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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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SEPARATION ( separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B 9/02 ; treatment of water C02F, e.g. softening by ion-exchange C02F 1/42 ;
{
arrangements of air intake cleaners in gas turbine plants F02C 7/05
}
; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F 13/28 )
NOTE
-
This subclass covers:
- evaporation, distillation, crystallisation, filtration, dust precipitation, gas cleaning, absorption, adsorption;
- similar processes which are not concerned with, or limited to, separation (except in
the case of absorption or adsorption).

In this subclass the terms or expressions are used with the meaning indicated:
- "filtration" and analogous terms include straining solids from fluids;
- "filter medium" is a porous material or porous arrangement of material used to filter solids from fluids;
- "filtering element" is a section of filter medium in addition to parts to which the medium is demountably or permanently fixed, including other sections of medium, end caps, peripheral frames or edge strips, but excluding housings;
- "filter housing" is the fluid-constraining impervious vessel, whether open or closed, which contains, or is adapted to contain, one or more filtering elements or filter media;
- "filter chamber" is the space within a housing, where filtering elements or filter media are located. Partitions may divide a single housing into a plurality of chambers;
- "filtering apparatus" consists of filtering elements combined with housings, cleaning arrangements, motor or the like parts, which are characteristic of the particular type of apparatus. Ancillary devices such as pumps or valves are considered part of a filtering apparatus when inside the apparatus. Ancillary devices performing similar or different unit operation such as comminutors, mixers or non-filtering separators, whether or not inside the apparatus, are not considered part of a filtering apparatus. The term does not extend to apparatus, e.g. washing machines, of which the filter forms only a part.

For apparatus used in drying or evaporation, F26 takes precedence over B01D.

Group B01D 59/00 takes precedence over the other groups of this subclass and over other subclasses in class B01


WARNING
-
 
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following groups:

B01D 19/0454 covered by B01D 9/00
B01D15/04 covered by B01J 39/00 to B01J 49/02
B01D17/022 covered by B01D 17/0202
B01D17/025 covered by B01D 17/0208
B01D17/028 covered by B01D 17/0211
B01D17/032 covered by B01D 17/0214
B01D17/035 covered by B01D 17/0205
B01D17/038 covered by B01D 17/0217
B01D17/05 covered by B01D 17/047
B01D17/09 covered by B01D 17/005
B01D 17/12 covered by B01D 17/00
B01D25/133 covered by B01D 25/285
B01D25/168 covered by B01D 25/285
B01D 25/21 covered by B01D 25/164
B01D29/075 covered by B01D 29/62 , B01D 29/76
B01D29/37 covered by B01D 29/336 , B01D 29/356
B01D33/052 covered by B01D 33/64
B01D35/01 covered by B01D 36/001
B01D61/26 covered by A61M 1/1656
B01D61/34 covered by A61M 1/16

5. The group B01D 24/00 was introduced in March 1989. This group includes subject matter of B01D 23/00 , B01D 25/06 , B01D 25/10 , B01D 29/0027 , B01D 33/0032 and B01D 33/0054 .

6. Documents from the backlog of the group B01D 23/00 , and the subgroups B01D 25/06 , B01D 25/10 , B01D 29/0027 , B01D 33/0032 and B01D 33/0054 are in the process of being revised and also systematically transferred to B01D 24/00 .

7. The groups B01D 29/01 to B01D 29/43 and B01D 29/50 to B01D 29/965 were introduced in March 1989; these subgroups include the subject matter of the subgroups of groups B01D 29/0002 , which are from this date no longer use for the classification of new documents.

8. The documents from the backlog of the subgroups of group B01D 29/0002 are in the process of being systematically transferred to the other subgroups of group B01D 29/00 .

11. The documents from the backlog of the subgroups of group B01D 33/0003 are in the process of being systematically transferred to the other subgroups of group B01D 33/00 .

9. Groups B01D 25/16 , B01D 25/18 and B01D 25/20 are no longer used for the classification of new. Patent documents are continuously being reclassified to groups B01D 29/44 , B01D 29/46 and B01D 29/48 .

10. The groups B01D 25/04 , B01D 25/08 , B01D 25/121 , B01D 25/122 , B01D 25/124 , B01D 25/125 , B01D 25/14 , are no longer used for classification of new documents from December 1, 2011 onwards. The backlog of those groups are being continuously reclassified to groups B01D 25/00 , B01D 29/00 and subgroups.


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Evaporating (
{
evaporation in general, e.g. of liquids for gas phase reactions B01B 1/005
}
; removal of incrustation B08B; preparation of starch C08B 30/00 ; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26 )
B01D 1/0005
.
{
Evaporating devices suitable for floating on water
}
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B01D 1/0011
.
{
Heating features
}
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. .
{
Use of electrical or wave energy ( B01D 1/0029 takes precedence )
}
B01D 1/0023
. . .
{
Induction heating
}
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B01D 1/0029
. .
{
Use of radiation
}
. . .
{
Solar energy ( for treatment of water C02F 1/14 )
}
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B01D 1/0041
. .
{
Use of fluids
}
B01D 1/0047
. . .
{
in a closed circuit ( B01D 3/007 takes precedence )
}
B01D 1/0052
. . .
{
Use of a liquid transfer medium or intermediate fluid, e.g. bain-marie
}
B01D 1/0058
. .
{
Use of waste energy from other processes or sources, e.g. combustion gas ( for water treatment C02F 1/16 )
}
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B01D 1/0064
.
{
Feeding of liquid into an evaporator
}
B01D 1/007
. .
{
the liquid feed being split up in at least two streams before entering the evaporator
}
B01D 1/0076
. .
{
Maintaining the liquid in the evaporator at a constant level
}
B01D 1/0082
.
{
Regulation; Control
}
B01D 1/0088
.
{
Cascade evaporators
}
B01D 1/0094
.
{
with forced circulation
}
B01D 1/02
.
Evaporators with heating coils
B01D 1/04
.
Evaporators with horizontal tubes
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B01D 1/06
.
Evaporators with vertical tubes
. .
{
by film evaporating
}
B01D 1/08
. .
with short tubes ( B01D 1/12
{
B01D 1/065
}
take precedence )
B01D 1/10
. .
with long tubes, e.g. Kestner evaporators ( B01D 1/12
{
B01D 1/065
}
take precedence )
B01D 1/12
. .
and forced circulation
B01D 1/14
.
with heated gases or vapours
{
or liquids
}
in contact with the liquid
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B01D 1/16
.
by spraying ( B01D 1/22 takes precedence )
. .
to obtain dry solids ( B01D 1/24 takes precedence )
. .
Sprayers ( in general B05B )
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B01D 1/22
.
by bringing a thin layer of the liquid into contact with a heated surface
{
( B01D 1/065 takes precedence )
}
B01D 1/221
. .
{
Composite plate evaporators
}
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B01D 1/222
. .
{
In rotating vessels; vessels with movable parts
}
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B01D 1/223
. . .
{
containing a rotor
}
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B01D 1/225
. . . .
{
with blades or scrapers
}
B01D 1/226
. . . . .
{
in the form of a screw or with helical blade members
}
B01D 1/227
. . . .
{
with brushes
}
B01D 1/228
. . .
{
horizontally placed cylindrical container or drum ( B01D 1/223 takes precedence )
}
. .
to obtain dry solids
B01D 1/26
.
Multiple-effect evaporating
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.
with vapour compression
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B01D 1/2803
. .
{
Special features relating to the vapour to be compressed
}
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B01D 1/2806
. . .
{
The vapour is divided in at least two streams and only a part of the vapour is compressed
}
B01D 1/2809
. . . .
{
At least two streams are compressed
}
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B01D 1/2812
. . .
{
The vapour is coming from different sources
}
B01D 1/2815
. . . .
{
At least one source is a compressor
}
B01D 1/2818
. . .
{
Cleaning of the vapour before compression, e.g. demisters, washing of the vapour
}
B01D 1/2821
. . .
{
B2+B2B
}
B01D 1/2825
. . .
{
B2+B4
}
B01D 1/2828
. . .
{
B2+B4B
}
B01D 1/2831
. . .
{
B2B+B4
}
B01D 1/2834
. . .
{
B2B+B4B
}
B01D 1/2837
. . .
{
B4+B4B
}
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B01D 1/284
. .
{
Special features relating to the compressed vapour
}
B01D 1/2843
. . .
{
The compressed vapour is divided in at least two streams
}
B01D 1/2846
. . .
{
The compressed vapour is not directed to the same apparatus from which the vapour was taken off
}
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B01D 1/285
. . .
{
In combination with vapour from an other source
}
B01D 1/2853
. . . .
{
At least one of the other sources is a compressor, ejector
}
B01D 1/2856
. . .
{
The compressed vapour is used for heating a reboiler or a heat exchanger outside an evaporator
}
B01D 1/2859
. . .
{
D2+D4
}
NOTE
-
Documents are only classified in B01D 1/2843 when at least one stream is directed to the same apparatus from which the vapour was taken off

B01D 1/2862
. . .
{
D2+D4+D6
}
B01D 1/2865
. . .
{
D2+D4+D6B
}
B01D 1/2868
. . .
{
D2+D6
}
B01D 1/2871
. . .
{
D2+D6B
}
B01D 1/2875
. . .
{
D4+D6
}
B01D 1/2878
. . .
{
D4+D6B
}
B01D 1/2881
. .
{
Compression specifications ( e.g. pressure, temperature, processes )
}
B01D 1/2884
. .
{
Multiple effect compression ( B01D 1/2815 , B01D 1/2828 , B01D 1/2834 and B01D 1/2837 take precedence )
}
B01D 1/2887
. .
{
The compressor is integrated in the evaporation apparatus
}
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B01D 1/289
. .
{
Compressor features ( e.g. constructions, details, cooling, lubrication, driving systems )
}
B01D 1/2893
. . .
{
Driving systems
}
B01D 1/2896
. .
{
Control, regulation
}
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B01D 1/30
.
Accessories for evaporators;
{
Constructional details thereof
}
B01D 1/305
. .
{
Demister (vapour-liquid separation)
}
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Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping (
{
evaporation in general, e.g. of liquids for gas phase reactions B01B 1/005
}
; gas chromatography B01D 15/08 ; destructive distillation C10B ; preparation of alcoholic beverages by distillation C12G 3/12 )
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.
{
Processes specially adapted for distillation or rectification of fermented solutions
}
. .
{
by continuous methods
}
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. .
{
Rectification of spirit
}
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B01D 3/004
. . .
{
by continuous methods
}
B01D 3/005
. . . .
{
Combined distillation and rectification
}
B01D 3/006
.
{
by vibration
}
B01D 3/007
.
{
Energy recuperation; Heat pumps
}
.
{
Liquid distribution
}
.
{
in combination with chemical reactions
}
B01D 3/02
.
in boilers or stills
B01D 3/04
.
pipe stills
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B01D 3/06
.
Flash distillation
B01D 3/065
. .
{
Multiple-effect flash distillation ( more than two traps )
}
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B01D 3/08
.
in rotating vessels ; Atomisation on rotating discs (
{
B01D 1/222
}
, B01D 3/10 take precedence )
. .
{
using a rotary evaporator
}
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B01D 3/10
.
Vacuum distillation ( B01D 3/12 takes precedence )
B01D 3/101
. .
{
Recirculation of the fluid used as fluid working medium in a vacuum creating device
}
B01D 3/103
. .
{
by using a barometric column
}
B01D 3/105
. .
{
with the use of an ejector for creating the vacuum, the ejector being placed between evaporator or distillation devices
}
B01D 3/106
. .
{
with the use of a pump for creating vacuum and for removing the distillate
}
B01D 3/108
. .
{
using a vacuum lock for removing the concentrate during distillation
}
B01D 3/12
.
Molecular distillation
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.
Fractional distillation
{
or use of a fractionation or rectification column
}
B01D 3/141
. .
{
where at least one distillation column contains at least one dividing wall
}
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B01D 3/143
. .
{
by two or more of a fractionation, separation or rectification step
}
B01D 3/145
. . .
{
One step being separation by permeation
}
B01D 3/146
. . .
{
Multiple effect distillation
}
B01D 3/148
. . .
{
in combination with at least one evaporator
}
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B01D 3/16
. .
Fractionating columns in which vapour bubbles through liquid ( packing elements B01J 19/30 , B01J 19/32 )
B01D 3/163
. . .
{
Plates with valves
}
B01D 3/166
. . .
{
Heating and/or cooling of plates
}
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B01D 3/18
. . .
with horizontal bubble plates
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B01D 3/20
. . . .
Bubble caps ; Risers for vapour ; Discharge pipes for liquid
B01D 3/205
. . . . .
{
Bubble caps
}
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B01D 3/22
. . .
with horizontal sieve plates or grids ; Construction of sieve plates or grids
B01D 3/225
. . . .
{
Dual-flow sieve trays
}
B01D 3/24
. . .
with sloping plates or elements mounted stepwise
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B01D 3/26
. .
Fractionating columns in which vapour and liquid flow past each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction
B01D 3/28
. . .
Fractionating columns with surface contact and vertical guides, e.g. film action
B01D 3/30
. .
Fractionating columns with movable parts or in which centrifugal movement is caused
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B01D 3/32
. .
Other features of fractionating columns;
{
Constructional details of fractionating columns not provided for in groups B01D 3/16 to B01D 3/30
}
B01D 3/322
. . .
{
Reboiler specifications
}
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B01D 3/324
. . .
{
Tray constructions
}
B01D 3/326
. . . .
{
Tray supports
}
B01D 3/328
. . . .
{
Sealing between the column and the trays
}
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B01D 3/34
.
with one or more auxiliary substances
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B01D 3/343
. .
{
the substance being a gas
}
B01D 3/346
. . .
{
the gas being used for removing vapours, e.g. transport gas
}
B01D 3/36
. .
Azeotropic distillation
B01D 3/38
. .
Steam distillation
. .
Extractive distillation
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B01D 3/42
.
Regulation ; Control
B01D 3/4205
. .
{
Reflux ratio control splitter
}
Collapse
B01D 3/4211
. .
{
of columns
}
B01D 3/4216
. . .
{
Head stream
}
B01D 3/4222
. . .
{
Head- and side stream
}
B01D 3/4227
. . .
{
Head- and bottom stream
}
B01D 3/4233
. . .
{
Head- and feed stream
}
B01D 3/4238
. . .
{
Head-, side- and bottom stream
}
B01D 3/4244
. . .
{
Head-, side- and feed stream
}
B01D 3/425
. . .
{
Head-, bottom- and feed stream
}
B01D 3/4255
. . .
{
Head-, side-, bottom- and feed stream
}
B01D 3/4261
. . .
{
Side stream
}
B01D 3/4266
. . .
{
Side- and bottom stream
}
B01D 3/4272
. . .
{
Side- and feed stream
}
B01D 3/4277
. . .
{
Side-, bottom- and feed stream
}
B01D 3/4283
. . .
{
Bottom stream
}
B01D 3/4288
. . .
{
Bottom- and feed stream
}
B01D 3/4294
. . .
{
Feed stream
}
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Condensation of vapours ; Recovering volatile solvents by condensation ( B01D 8/00 takes precedence; condensers F28B )
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.
{
by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
}
B01D 5/0006
. .
{
Coils or serpentines
}
B01D 5/0009
. .
{
Horizontal tubes
}
B01D 5/0012
. .
{
Vertical tubes
}
B01D 5/0015
. .
{
Plates
}
B01D 5/0018
. .
{
Dome shaped ( B01D 5/0066 takes precedence )
}
B01D 5/0021
. .
{
Vortex
}
B01D 5/0024
. .
{
Rotating vessels or vessels containing movable parts
}
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B01D 5/0027
.
{
by direct contact between vapours or gases and the cooling medium
}
B01D 5/003
. .
{
within column(s)
}
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B01D 5/0033
.
{
Other features
}
B01D 5/0036
. .
{
Multiple-effect condensation; Fractional condensation
}
B01D 5/0039
. .
{
Recuperation of heat, e.g. use of heat pump(s), compression
}
B01D 5/0042
. .
{
Thermo-electric condensing; using Peltier-effect
}
B01D 5/0045
. .
{
Vacuum condensation
}
B01D 5/0048
. .
{
Barometric condensation
}
B01D 5/0051
. .
{
Regulation processes; Control systems e.g. valves
}
B01D 5/0054
. .
{
General arrangements, e.g. flow sheets
}
Collapse
B01D 5/0057
.
{
in combination with other processes
}
Collapse
B01D 5/006
. .
{
with evaporation or distillation
}
B01D 5/0063
. . .
{
Reflux condensation
}
B01D 5/0066
. . .
{
Dome shaped condensation
}
B01D 5/0069
. .
{
with degasification or deaeration
}
B01D 5/0072
. .
{
with filtration
}
B01D 5/0075
. .
{
with heat exchanging ( B01D 5/0039 takes precedence )
}
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B01D 5/0078
.
{
characterised by auxiliary systems or arrangements
}
B01D 5/0081
. .
{
Feeding the steam or the vapours
}
B01D 5/0084
. .
{
Feeding or collecting the cooling medium ( B01D 5/0087 takes precedence )
}
B01D 5/0087
. .
{
Recirculating of the cooling medium
}
B01D 5/009
. .
{
Collecting, removing and/or treatment of the condensate
}
B01D 5/0093
. .
{
Removing and treatment of non condensable gases
}
B01D 5/0096
. .
{
Cleaning ( cleaning in general B08B )
}
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Sublimation ( B01D 8/00 takes precedence; freeze-drying F26 )
B01D 7/02
.
Crystallisation directly from the vapour phase ( into single crystals C30B 23/00 )
Cold traps ; Cold baffles ( pumps for evacuating by condensing or freezing F04B 37/08 )
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Crystallisation ( crystallisation directly from the vapour phase B01D 7/02 ; making single crystals C30B ;
{
crystallisation as part of the Bayer process also classified in C01F 7/14
}
)
Collapse
B01D 9/0004
.
{
cooling by heat exchange ( by evaporation of components of the mixture to be separated B01D 9/0013 ; refrigeration machines F25B )
}
B01D 9/0009
. .
{
by direct heat exchange with added cooling fluid
}
B01D 9/0013
. .
{
by indirect heat exchange
}
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B01D 9/0018
.
{
Evaporation of components of the mixture to be separated
}
B01D 9/0022
. .
{
by reducing pressure
}
B01D 9/0027
. .
{
by means of conveying fluid, e.g. spray-crystallisation ( spray-drying F26B )
}
B01D 9/0031
. .
{
by heating ( B01D 9/0022 , B01D 9/0027 take precedence )
}
B01D 9/0036
.
{
Crystallisation on to a bed of product crystals; Seeding
}
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B01D 9/004
.
{
Fractional crystallisation; Fractionating or rectifying columns
}
B01D 9/0045
. .
{
Washing of crystals, e.g. in wash columns
}
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B01D 9/005
.
{
Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
}
B01D 9/0054
. .
{
Use of anti-solvent
}
B01D 9/0059
.
{
General arrangements of crystallisation plant, e.g. flow sheets
}
B01D 9/0063
.
{
Control or regulation ( control per se G05 )
}
B01D 9/0068
.
{
Prevention of crystallisation
}
B01D 9/0072
.
{
Crystallisation in microfluidic devices
}
B01D 9/0077
.
{
Screening for crystallisation conditions or for crystal forms
}
B01D 9/0081
.
{
Use of vibrations, e.g. ultrasound
}
Collapse
B01D 2009/0086
.
{
Processes or apparatus therefor
}
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B01D 2009/009
. .
{
Separation of organic compounds by selective or extractive crystallisation with the aid of auxiliary substances forming complex or molecular compounds, e.g. with ureum, thioureum or metal salts
}
B01D 2009/0095
. . .
{
with the aid of other complex forming substances than ureum, thioureum or metal salts
}
Collapse
B01D 9/02
.
from solutions
{
not used
}
B01D 9/04
. .
concentrating solutions by removing frozen solvent therefrom
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Solvent extraction
B01D 2011/002
.
{
Counter-current extraction
}
B01D 2011/005
.
{
Co-current extraction
}
B01D 2011/007
.
{
Extraction using a solvent in the gas phase
}
Collapse
B01D 11/02
.
of solids
NOTE
-
Combinations of characteristics of individual groups, e.g. B01D 11/0226 and B01D 11/028 are expressed as B01D 11/0226 +B01D 11/028

B01D 11/0203
. .
{
with a supercritical fluid
}
B01D 11/0207
. .
{
Control systems
}
B01D 11/0211
. .
{
in combination with an electric or magnetic field
}
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B01D 11/0215
. .
{
Solid material in other stationary receptacles
}
B01D 11/0219
. . .
{
Fixed bed of solid material
}
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B01D 11/0223
. . .
{
Moving bed of solid material ( see also B01D 11/0261 )
}
B01D 11/0226
. . . .
{
with the general transport direction of the solids parallel to the rotation axis of the conveyer, e.g. worm
}
B01D 11/023
. . . .
{
using moving bands, trays fixed on moving transport chains
}
B01D 11/0234
. . . .
{
using other slow rotating arms or elements, whereby the general transport direction of the solids is not parallel to the rotation axis, e.g. perpendicular ( B01D 11/0238 takes precedence )
}
B01D 11/0238
. . . .
{
on fixed or rotating flat surfaces, e.g. tables combined with rotating elements or on rotating flat surfaces
}
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B01D 11/0242
. . . .
{
in towers, e.g. comprising contacting elements
}
B01D 11/0246
. . . . .
{
comprising rotating means
}
B01D 11/0249
. . . . .
{
comprising jet means
}
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B01D 11/0253
. . .
{
Fluidised bed of solid materials
}
B01D 11/0257
. . . .
{
using mixing mechanisms, e.g. stirrers, jets ( B01D 11/0242 takes precedence )
}
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B01D 11/0261
. .
{
comprising vibrating mechanisms, e.g. mechanical, acoustical
}
B01D 11/0265
. . .
{
Applying ultrasound
}
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B01D 11/0269
. .
{
Solid material in other moving receptacles ( B01D 11/0238 takes precedence )
}
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B01D 11/0273
. . .
{
in rotating drums
}
B01D 11/0276
. . . .
{
with the general transport direction of the solids parallel to the rotation axis of the conveyer, e.g. spirals
}
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B01D 11/028
. .
{
Flow sheets
}
B01D 11/0284
. . .
{
Multistage extraction
}
B01D 11/0288
. .
{
Applications, solvents
}
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B01D 11/0292
. .
{
Treatment of the solvent
}
B01D 11/0296
. . .
{
Condensation of solvent vapours ( condensation in general B01D 5/00 )
}
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B01D 11/04
.
of solutions which are liquid
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B01D 11/0403
. .
{
with a supercritical fluid
}
B01D 11/0407
. . .
{
the supercritical fluid acting as solvent for the solute
}
B01D 11/0411
. . .
{
the supercritical fluid acting as solvent for the solvent and as anti-solvent for the solute, e.g. formation of particles from solutions
}
B01D 11/0415
. .
{
in combination with membranes
}
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B01D 11/0419
. .
{
in combination with an electric or magnetic field or with vibrations
}
B01D 11/0423
. . .
{
Applying ultrasound
}
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B01D 11/0426
. .
{
Counter-current multistage extraction towers in a vertical or sloping position
}
B01D 11/043
. . .
{
with stationary contacting elements, sieve plates or loose contacting elements
}
B01D 11/0434
. . .
{
comprising rotating mechanisms, e.g. mixers, rotational oscillating motion, mixing pumps
}
B01D 11/0438
. . .
{
comprising vibrating mechanisms, electromagnetic radiations
}
B01D 11/0442
. . .
{
Mixers with gas-agitation
}
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B01D 11/0446
. .
{
Juxtaposition of mixers-settlers
}
B01D 11/0449
. . .
{
with stationary contacting elements
}
B01D 11/0453
. . .
{
with narrow passages limited by plates, walls, e.g. helically coiled tubes ( B01D 11/0461 takes precedence )
}
B01D 11/0457
. . .
{
comprising rotating mechanisms, e.g. mixers, mixing pumps
}
B01D 11/0461
. . .
{
mixing by counter-current streams provoked by centrifugal force
}
B01D 11/0465
. . .
{
comprising vibrating mechanisms, radiations
}
B01D 11/0469
. . .
{
with gas agitation
}
B01D 11/0473
. . .
{
Jet mixers, venturi mixers
}
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B01D 11/0476
. .
{
Moving receptacles, e.g. rotating receptacles
}
B01D 11/048
. . .
{
Mixing by counter-current streams provoked by centrifugal force, in rotating coils or in other rotating spaces
}
B01D 11/0484
. .
{
Controlling means
}
B01D 11/0488
. .
{
Flow sheets
}
B01D 11/0492
. .
{
Applications, solvents used
}
B01D 11/0496
. .
{
by extraction in microfluidic devices
}
Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
NOTE
-
Attention is drawn to WARNING (6) following the subclass title

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Separating processes involving the treatment of liquids with solid sorbents ( using liquid sorbents B01D 11/00 ; ion exchange processes or materials, sorbent materials in general B01J, e.g. sorbents for chromatography B01J 20/281 ; for investigating or analysing materials G01N 30/00 ) ; Apparatus therefor
B01D 15/02
.
with moving adsorbents
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B01D 15/08
.
Selective adsorption, e.g. chromatography
NOTE
-

In order that group B01D 15/08 may provide a basis for a complete search with respect to chromatography in general, all subject matter of general interest is classified in this group even if it is classified primarily in the application-oriented groups, for example dairy products A23C 9/148 , treatment of blood, e.g. A61M 1/36 , optically active organic compounds C07B 57/00 or peptides C07K 1/16

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B01D 15/10
. .
caracterised by constructional or operational features
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B01D 15/12
. . .
relating to the preparation of the feed
B01D 15/125
. . . .
{
Pre-filtration
}
B01D 15/14
. . .
relating to the introduction of the feed to the apparatus
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B01D 15/16
. . .
relating to the conditioning of the fluid carrier
B01D 15/161
. . . .
{
Temperature conditioning
}
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B01D 15/163
. . . .
{
Pressure or speed conditioning
}
B01D 15/165
. . . . .
{
Flash chromatography
}
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B01D 15/166
. . . .
{
Fluid composition conditioning, e.g. gradient
}
B01D 15/168
. . . . .
{
pH gradient, chromatofocusing, i.e. separation according to the isoelectric point pI
}
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B01D 15/18
. . .
relating to flow patterns
B01D 15/1807
. . . .
{
using counter-currents, e.g. fluidised beds
}
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B01D 15/1814
. . . .
{
recycling of the fraction to be distributed
}
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B01D 15/1821
. . . . .
{
Simulated moving beds
}
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B01D 15/1828
. . . . . .
{
characterized by process features
}
B01D 15/1835
. . . . . . .
{
Flushing
}
B01D 15/1842
. . . . . .
{
characterized by apparatus features
}
B01D 15/185
. . . . . .
{
characterized by the components to be separated
}
B01D 15/1857
. . . . .
{
Reactive simulated moving beds
}
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B01D 15/1864
. . . .
{
using two or more columns
}
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B01D 15/1871
. . . . .
{
placed in series
}
B01D 15/1878
. . . . . .
{
for multi-dimensional chromatography
}
B01D 15/1885
. . . . .
{
placed in parallel
}
B01D 15/1892
. . . .
{
the sorbent material moving as a whole, e.g. continuous annular chromatography, true moving beds
}
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B01D 15/20
. . .
relating to the conditioning of the sorbent material
B01D 15/203
. . . .
{
Equilibration or regeneration
}
B01D 15/206
. . . .
{
Packing or coating
}
B01D 15/22
. . .
relating to the construction of the column
Collapse
B01D 15/24
. . .
relating to the treatment of the fractions to be distributed
B01D 15/242
. . . .
{
Intermediate storage of effluents
}
B01D 15/245
. . . .
{
Adding materials to the effluents
}
B01D 15/247
. . . .
{
Fraction collectors
}
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B01D 15/26
. .
characterised by the separation mechanism
B01D 15/265
. . .
{
Adsorption chromatography
}
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B01D 15/30
. . .
Partition chromatography
B01D 15/305
. . . .
{
Hydrophilic interaction chromatography (HILIC)
}
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B01D 15/32
. . .
Bonded phase chromatography
B01D 15/322
. . . .
{
Normal bonded phase
}
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B01D 15/325
. . . .
{
Reversed phase
}
B01D 15/327
. . . . .
{
with hydrophobic interaction
}
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B01D 15/34
. . .
Size selective separation, e.g. size exclusion chromatography, gel filtration, permeation
B01D 15/345
. . . .
{
Perfusive chromatography
}
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B01D 15/36
. . .
involving ionic interaction
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B01D 15/361
. . . .
{
Ion-exchange
}
B01D 15/362
. . . . .
{
Cation-exchange
}
B01D 15/363
. . . . .
{
Anion-exchange
}
B01D 15/364
. . . . .
{
Amphoteric or zwitterionic ion-exchanger
}
B01D 15/365
. . . .
{
Ion-exclusion
}
B01D 15/366
. . . .
{
Ion-pair, e.g. ion-pair reversed phase
}
B01D 15/367
. . . .
{
Ion-suppression
}
B01D 15/368
. . . .
{
Cation- pi interaction
}
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B01D 15/38
. . .
involving specific interaction not covered by one or more of groups B01D 15/265 to B01D 15/36
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B01D 15/3804
. . . .
{
Affinity chromatography
}
B01D 15/3809
. . . . .
{
of the antigen-antibody type, e.g. protein A, G, L chromatography
}
B01D 15/3814
. . . . .
{
of the substrate or co-factor - enzyme type
}
B01D 15/3819
. . . . .
{
of the nucleic acid-nucleic acid binding protein type
}
B01D 15/3823
. . . . .
{
of other types, e.g. avidin, streptavidin, biotin
}
B01D 15/3828
. . . . .
{
Ligand exchange chromatography, e.g. complexation, chelation or metal interaction chromatography
}
B01D 15/3833
. . . .
{
Chiral chromatography
}
B01D 2015/3838
. . . .
{
Ligand exchange chromatography, e.g. complexation chromatography, chelation chromatography, metal interaction chromatography
}
B01D 15/3842
. . . .
{
Micellar chromatography
}
B01D 15/3847
. . . .
{
Multimodal interactions
}
B01D 15/3852
. . . .
{
using imprinted phases or molecular recognition; using imprinted phases
}
B01D 15/3857
. . . .
{
Reaction chromatography
}
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B01D 15/3861
. . . .
{
using an external stimulus
}
B01D 15/3866
. . . . .
{
using ultra-sound
}
B01D 15/3871
. . . . .
{
using light
}
B01D 15/3876
. . . . .
{
modifying the temperature
}
B01D 15/388
. . . . .
{
modifying the pH
}
B01D 15/3885
. . . . .
{
Using electrical or magnetic means
}
B01D 2015/389
. . . .
{
using ultra-sound
}
B01D 2015/3895
. . . .
{
using light
}
B01D 15/40
. . .
using supercritical fluid as mobile phase or eluent
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B01D 15/42
. .
characterised by the development mode, e.g. by displacement or by elution
B01D 15/422
. . .
{
Displacement mode
}
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B01D 15/424
. . .
{
Elution mode
}
B01D 15/426
. . . .
{
Specific type of solvent
}
B01D 15/428
. . .
{
Frontal mode
}
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Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion ( devices for separating or removing fatty or oily substances or similar floating material from water, waste water, or sewage C02F 1/40 ; cleaning or keeping clear the surface of open water from oil or like materials E02B 15/04 ; arrangements for separating lubricants from refrigerants F25B 43/02 )
NOTE
-
in this group, documents are classified and arranged according to a combination system limited to the symbols of the group and subgroups of B01D 17/00 . In this system each combination is indicated, also of subgroups depending from the same group, e.g. B01D 17/041 +B01D 17/042

B01D 17/005
.
{
by thermal diffusion
}
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B01D 17/02
.
Separation of non-miscible liquids
B01D 17/0202
. .
{
by ab- or adsorption
}
. .
{
by gas bubbles or moving solids
}
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B01D 17/0208
. .
{
by sedimentation
}
B01D 17/0211
. . .
{
with baffles
}
B01D 17/0214
. . .
{
with removal of one of the phases
}
. .
{
by centrifugal force
}
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B01D 17/04
. .
Breaking emulsions
B01D 17/041
. . .
{
with moving devices
}
B01D 17/042
. . .
{
by changing the temperature
}
B01D 17/044
. . .
{
by changing the pressure
}
. . .
{
with coalescers
}
. . .
{
with separation aids
}
. . .
{
by changing the state of aggregation
}
.
Separation of liquids from each other by electricity
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B01D 17/08
.
Thickening liquid suspensions by filtration
B01D 17/085
. .
{
with membranes
}
B01D 17/10
. .
with stationary filtering elements
B01D 17/12
.
Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
WARNING
-
This group is not complete pending reclassification; see also group B01D 17/00

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Degasification of liquids
Collapse
B01D 19/0005
.
{
with one or more auxiliary substances
}
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B01D 19/001
. .
{
by bubbling steam through the liquid ( B01D 19/0042 , B01D 19/0047 and B01D 19/0052 take precedence )
}
B01D 19/0015
. . .
{
in contact columns containing plates, grids or other filling elements
}
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B01D 19/0021
.
{
by bringing the liquid in a thin layer
}
B01D 19/0026
. .
{
in rotating vessels or in vessels containing movable parts
}
B01D 19/0031
.
{
by filtration
}
.
{
Flash degasification ( the other groups take precedence )
}
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B01D 19/0042
.
{
modifying the liquid flow ( B01D 19/0021 takes precedence )
}
B01D 19/0047
. .
{
Atomizing, spraying, trickling
}
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B01D 19/0052
. .
{
in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused ( B01D 19/0026 takes precedence )
}
. . .
{
the centrifugal movement being caused by a vortex, e.g. using a cyclone, or by a tangential inlet
}
.
{
Regulation, control including valves and floats ( for construction and details of valves F16K )
}
B01D 19/0068
.
{
General arrangements, e.g. flowsheets ( B01D 19/0063 takes precence )
}
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B01D 19/0073
.
{
by a method not covered by groups B01D 19/0005 to B01D 19/0042
}
B01D 19/0078
. .
{
by vibration
}
. .
{
using an electric current
}
. .
{
using a magnetic field ( magnetic separation in general B03C 1/00 )
}
. .
{
by using a vortex, cavitation
}
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.
Foam dispersion or prevention ( during boiling B01B 1/02 ; during fermentation C12 )
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B01D 19/04
. .
by addition of chemical substances
NOTE
-
Antifoam compositions containing a specific compound as the main substance are only classified in the, for this specific compound, corresponding B01D 19/0404 subgroup (e.g. polysiloxanes receive the classification B01D 19/0409 ); when the specific compound(s) is (are) not the main substance, then the attributed classification for this compound(s) is a combination of B01D 19/0404 + the corresponding B01D 19/0404 subgroup(s), (e.g. hydrocarbons containing silica are classified in B01D 19/0404 + B01D 19/0409 ).
If the main substance is a mixture containing more than one specific compound, then the attributed classification is a combination of the corresponding B01D 19/0404 subgroup of the specific compounds, (e.g. benzene sulfonate and an amide are classified in B01D 19/0413 + B01D 9/02 ).

In groups B01D 19/0404 to B01D 19/0495 , in the absence of an indication to the contrary, an invention is classified in the last appropriate place].

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B01D 19/0404
. . .
{
characterised by the nature of the chemical substance
}
B01D 19/0409
. . . .
{
compounds containing Si-atoms
}
B01D 19/0413
. . . .
{
compounds containing N-atoms
}
B01D 19/0418
. . . .
{
compounds containing P-atoms
}
B01D 19/0422
. . . .
{
compounds containing S-atoms
}
B01D 19/0427
. . . .
{
compounds containing halogen-atoms
}
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B01D 19/0431
. . . .
{
containing aromatic rings
}
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B01D 19/0436
. . . . .
{
with substituted groups
}
B01D 19/044
. . . . . .
{
which contain Si-atoms
}
B01D 19/0445
. . . . . .
{
which contain N-atoms
}
B01D 19/045
. . . . . .
{
which contain P-atoms
}
B01D 19/0454
. . . . . .
{
which contain S-atoms
}
B01D 19/0459
. . . . . .
{
which contain halogen-atoms
}
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B01D 19/0463
. . . .
{
containing rings other than aromatic rings
}
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B01D 19/0468
. . . . .
{
with substituted groups
}
B01D 19/0472
. . . . . .
{
which contain Si-atoms
}
B01D 19/0477
. . . . . .
{
which contain N-atoms
}
B01D 19/0481
. . . . . .
{
which contain P-atoms
}
B01D 19/0486
. . . . . .
{
which contain S-atoms
}
B01D 19/049
. . . . . .
{
which contain halogen-atoms
}
B01D 19/0495
. . . .
{
containing hetero rings
}
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Separation of suspended solid particles from liquids by sedimentation (
{
separation of ores or the like by sedimentation B03B 5/48 to B03B 5/60
}
; differential sedimentation B03D 3/00 ;
{
purification of water, waste water, sewage or sludge C02F, e.g.
}
devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F 1/40 )
WARNING
-
The following groups are not complete: B01D 21/0006, see also B01D 21/00 B01D 21/0018, see also B01D 21/00 B01D 21/0054 , see also B01D 21/00 B01D 21/0057 , see also B01D 21/00 B01D 21/003, see also B01D 21/00 B01D 21/0036 , see also B01D 21/00 B01D 21/0087, see also B01D 21/00 B01D 21/2416 , see also B01D 21/2405 B01D 21/2422 , see also B01D 21/2405 B01D 21/2427, see also B01D 21/24 B01D 21/2433, see also B01D 21/24 B01D 21/262, see also B01D 21/26 B01D 21/265, see also B01D 21/26 B01D 21/267, see also B01D 21/26 B01D 21/28 , see also B01D 21/28 B01D 21/302 , see also B01D 21/30 B01D21/30B, see also B01D 21/30 ]

B01D 21/0003
.
{
Making of sedimentation devices, structural details thereof, e.g. prefabricated parts
}
B01D 21/0006
.
{
Settling tanks provided with means for cleaning and maintenance
}
B01D 21/0009
.
{
Settling tanks making use of electricity or magnetism ( electric ultra filters B01D 61/425 ; filters making use of electricity or magnetism B01D 35/06 ; magnetic or electrostatic separation B03C )
}
B01D 21/0012
.
{
Settling tanks making use of filters, e.g. by floating layers of particulate material
}
B01D 21/0015
.
{
Controlling the inclination of settling devices
}
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B01D 21/0018
.
{
provided with a pump mounted in or on a settling tank
}
B01D 21/0021
. .
{
provided with a jet pump
}
B01D 21/0024
.
{
Inlets or outlets provided with regulating devices, e.g. valves, flaps ( B01D 21/24 takes precedence )
}
B01D 21/0027
.
{
Floating sedimentation devices
}
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B01D 21/003
.
{
Sedimentation tanks provided with a plurality of compartments separated by a partition wall ( B01D 21/0039 takes precedence )
}
B01D 21/0033
. .
{
Vertical, perforated partition walls ( B01D 21/2422 takes precedence )
}
B01D 21/0036
. .
{
Horizontal partition walls
}
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B01D 21/0039
.
{
Settling tanks provided with contact surfaces, e.g. baffles, particles
}
B01D 21/0042
. .
{
Baffles or guide plates
}
B01D 21/0045
. .
{
Plurality of essentially parallel plates
}
B01D 21/0048
. .
{
Plurality of plates inclined in alternating directions
}
B01D 21/0051
. .
{
Plurality of tube like channels
}
B01D 21/0054
. .
{
Plates in form of a coil
}
B01D 21/0057
. .
{
with counter-current flow direction of liquid and solid particles
}
B01D 21/006
. .
{
with co-current flow direction of liquid and solid particles
}
B01D 21/0063
. .
{
with cross-flow flow direction of liquid and solid particles
}
B01D 21/0066
. .
{
with a meandering flow pattern of liquid or solid particles
}
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B01D 21/0069
. .
{
Making of contact surfaces, structural details, materials therefor
}
B01D 21/0072
. . .
{
Means for adjusting, moving or controlling the position or inclination of the contact surfaces e.g. for optimising the particle-liquid separation, for removing the settled particles, for preventing fouling
}
B01D 21/0075
. . .
{
Contact surfaces having surface features
}
B01D 2021/0078
.
{
Settling tanks provided with contact surfaces, e.g. baffles, particles
}
B01D 2021/0081
.
{
Settling tanks provided with vibrators
}
B01D 21/0084
.
{
Enhancing liquid-particle separation using the flotation principle ( flotation in general B03D 1/00 )
}
B01D 21/0087
.
{
Settling tanks provided with means for ensuring a special flow pattern, e.g. even inflow or outflow ( B01D 21/2411 takes precedence )
}
B01D 21/009
.
{
Heating or cooling mechanisms specially adapted for settling tanks
}
B01D 21/0093
.
{
Mechanisms for taking out of action one or more units of a multi-unit settling mechanism
}
B01D 21/0096
.
{
Safety mechanisms specially adapted for settling tanks ( B01D 21/22 takes precedence )
}
B01D 21/01
.
using flocculating agents ( for purifying water C02F 1/52 ; for liquid radioactive waste G21F 9/10 )
Collapse
B01D 21/02
.
Settling tanks
{
with single outlets for the separated liquid
}
Collapse
B01D 21/04
. .
with moving scrapers
B01D 21/06
. . .
with rotating scrapers
B01D 21/08
. .
provided with flocculating compartments
Collapse
B01D 21/10
.
Settling tanks with multiple outlets for the separated liquids
Collapse
B01D 21/12
. .
with moving scrapers
B01D 21/14
. . .
with rotating scrapers
B01D 21/16
. .
provided with flocculating compartments
Collapse
B01D 21/18
.
Construction of the scrapers or the driving mechanisms for settling tanks
B01D 21/183
. .
{
with multiple scraping mechanisms
}
B01D 21/186
. .
{
with two or more scrapers fixed at different heights on a central rotating shaft
}
B01D 21/20
. .
Driving mechanisms
B01D 21/22
. .
Safety mechanisms
Collapse
B01D 21/24
.
Feed or discharge mechanisms for settling tanks
Collapse
B01D 21/2405
. .
{
Feed mechanisms for settling tanks
}
B01D 21/2411
. . .
{
having a tangential inlet
}
Collapse
B01D 21/2416
. . .
{
Liquid distributors with a plurality of feed points
}
B01D 21/2422
. . . .
{
Vertically arranged feed points
}
B01D 21/2427
. .
{
The feed or discharge opening located at a distant position from the side walls
}
Collapse
B01D 21/2433
. .
{
Discharge mechanisms for floating particles
}
B01D 21/2438
. . .
{
provided with scrapers on the liquid surface for removing floating particles
}
B01D 21/2444
. .
{
Discharge mechanisms for the classified liquid
}
Collapse
B01D 21/245
. .
{
Discharge mechanisms for the sediments
}
B01D 21/2455
. . .
{
Conveyer belts
}
B01D 21/2461
. . .
{
Positive-displacement pumps; Screw feeders; Trough conveyers
}
B01D 21/2466
. . .
{
Mammoth pumps, e.g. air lift pumps
}
B01D 21/2472
. . .
{
Means for fluidising the sediments, e.g. by jets or mechanical agitators
}
B01D 21/2477
. . .
{
Centrifugal pumps
}
B01D 21/2483
. . .
{
Means or provisions for manually removing the sediments
}
B01D 21/2488
. .
{
bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
}
B01D 21/2494
. .
{
provided with means for the removal of gas, e.g. noxious gas, air
}
Collapse
B01D 21/26
.
Separation of sediment aided by centrifugal force
{
or centripetal force
}
( centrifuges B04B ; cyclones B04C )
B01D 21/262
. .
{
by using a centrifuge
}
B01D 21/265
. .
{
by using a vortex inducer or vortex guide, e.g. coil ( B01D 21/0054 takes precedence )
}
B01D 21/267
. .
{
by using a cyclone
}
Collapse
B01D 21/28
.
Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
B01D 21/283
. .
{
Settling tanks provided with vibrators
}
B01D 21/286
. .
{
Means for gentle agitation for enhancing flocculation
}
Collapse
B01D 21/30
.
Control equipment
WARNING
-

Groups B01D 21/302 to B01D 21/34 are not complete, see also B01D 21/30

B01D 21/302
. .
{
Active control mechanisms with external energy e.g. with solenoid valve
}
B01D 21/305
. .
{
Control of chemical properties of a component, e.g. control of pH
}
B01D 21/307
. .
{
Passive control mechanisms without external energy, e.g. using a float
}
B01D 21/32
. .
Density control of clear liquid or sediment, e.g. optical control;
{
Control of physical properties
}
B01D 21/34
. .
Regulation of feed distribution ; Regulation of liquid level;
{
Control of process parameters
}
Collapse
Guide Heading:
Filtration ; Filtering material, regeneration thereof (
{
aquarium filters A01K 63/04 ; filters for cigars and cigarettes A24D 3/00 ; filters for coffee or tea-making machines A47J 31/06 ; filters for frying fat A47J 37/12 ; filters for suction cleaners A47L 9/10
}
; blood or infusion liquid filters A61M 5/165 ;
{
liquid-liquid separation, e.g. for filtering elements made hydrophilic or hydrophobic, B01D 12/00 , B01D 17/00 , B01D 43/00 ; filtering material and its regeneration, as well as filtering aids, B01D 39/00 ; gas or air filters in general B01D 46/00 ; filtration devices for laboratory use B01L ; "dewatering" ore or coal slurry B03B 5/48 ; magnetic filters B03C 1/00
}
; screens or sieves per se B07B 1/00 ;
{
filters for lubricating and cooling systems in turning, boring or milling machines B23Q 11/10 ; filters for cooling systems in grinding machines B24B 55/00
}
; extrusion filters B29C 47/68 ;
{
filter presses B30B 9/02 ; purification of process water, drinking water and waste water C02F ; filters for alcoholic beverages C12H 1/00
}
; filtering spinning solution or melt D01D 1/10 ;
{
filters for washing machines D06F 39/10 ; filters or strainers for papermaking D21D ; filters in water collecting systems E03B 3/18 , E03B 7/07 ; subsoil filters for boreholes E21B 43/02 ; air filters for internal-combustion engines F02M 35/02 ; filters for pumps F04B 39/16 , F04D 29/70 ; filters in pipe systems F16L 55/24
}
; filtration of lubricants F16N 39/06 ;
{
filters for volume measuring apparatus G01F 15/12
}
)
Collapse
Gravity filters ( with moving filtering elements B01D 33/0035 )
B01D 23/005
.
{
making filtering elements, not provided for elesewhere ( see also B01D 25/001 , B01D 27/005 , B01D 29/0093 )
}
Collapse
B01D 23/02
.
with fixed filter bodies
B01D 23/04
. .
with filter bags filtering from the inside
B01D 23/06
. .
with rigid tubular bodies
B01D 23/08
. .
with saucer-shaped filtering elements
Collapse
B01D 23/10
.
with loose filter material
B01D 23/12
. .
with filtering material supported on louvred sides
B01D 23/14
. .
carbon filters
B01D 23/16
. .
Sand or gravel filters
{
( filterbed-basin filters, small bed filters, e.g. in closed housing B01D 23/10 )
}
B01D 23/18
. .
Bottoms of filter beds
Collapse
B01D 23/20
.
Feed or discharge devices ( nozzles B05B )
B01D 23/205
. .
{
Special adaptation of spray heads therefor
}
B01D 23/24
.
Regeneration of the filter material in the filter
B01D 23/26
.
integrally combined with devices for controlling the filtration
{
( shutting-off elements, changing over from one element to another B01D 35/12 , B01D 35/14 ; control of filtration processes B01D 37/04 )
}
B01D 23/28
.
Filter funnels ; Holders therefor ( funnels in general B67C ;
{
funnels for laboratory use B01L ; coffee or tea strainers or apparatus A47J 31/00 - A47J 31/06
}
)
Collapse
Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof ( B01D 27/02 takes precedence )
NOTE
-
See WARNING after subclass title, particularly items (7), (8) and (14)

B01D 24/001
.
{
Making filter elements ( not provided for elsewhere ) ( see also B01D 25/001 , B01D 27/005 , B01D 29/012 , B01D 29/111 , B01D 33/0093 )
}
Collapse
B01D 24/002
.
{
with multiple filtering elements in parallel connection
}
B01D 24/004
. .
{
arranged concentrically or coaxially
}
. .
{
Filters being divided into a plurality of cells or compartments ( B01D 24/004 takes precedence )
}
Collapse
B01D 24/007
.
{
with multiple filtering elements in series connection
}
B01D 24/008
. .
{
arranged concentrically or coaxially
}
Collapse
B01D 24/02
.
with the filter bed stationary during the filtration
Collapse
. .
the filtering material being clamped between pervious fixed walls ( B01D 24/10 , B01D 24/20 take precedence )
B01D 24/042
. . .
{
the filtering material being held in a flexible porous bag
}
Collapse
B01D 24/045
. . .
{
with at least one flat vertical wall
}
B01D 24/047
. . . .
{
with vertical tubes distributing the liquid to be filtered or for collecting filtrate
}
B01D 24/06
. . .
the pervious walls comprising a series of louvres or slots
B01D 24/08
. . .
the filtering material being supported by at least two pervious coaxial walls
Collapse
B01D 24/10
. .
the filtering material being held in a closed container
B01D 24/105
. . .
{
downward filtration without specifications about the filter material supporting means
}
Collapse
. . .
Downward filtration, the filtering material being supported by pervious surfaces ( B01D 24/18 takes precedence )
B01D 2024/125
. . . .
{
spray heads specially adapted therefor
}
Collapse
. . .
Downward filtration, the container having distribution or collection headers or pervious conduits ( B01D 24/18 takes precedence )
B01D 2024/145
. . . .
{
spray heads specially adapted therefor
}
Collapse
. . .
Upward filtration ( B01D 24/18 takes precedence )
B01D 2024/162
. . . .
{
spray heads specially adapted therefor
}
B01D 24/165
. . . .
{
the filtering material being supported by pervious surfaces
}
B01D 24/167
. . . .
{
the container having distribution or collection headers or pervious conduits
}
Collapse
B01D 24/18
. . .
Combined upward and downward filtration
B01D 24/183
. . . .
{
the filtering material being supported by pervious surfaces
}
B01D 24/186
. . . .
{
the container having distribution or collection headers or pervious conduits
}
Collapse
B01D 24/20
. .
the filtering material being provided in an open container
B01D 24/205
. . .
{
Downward filtration without specifications about the filter material supporting means
}
B01D 24/22
. . .
Downward filtration, the filter material being supported by pervious surfaces
B01D 24/24
. . .
Downward filtration, the container having distribution or collection headers or pervious conduits
Collapse
B01D 24/26
. . .
Upward filtration
B01D 24/263
. . . .
{
the filtering material being supported by pervious surfaces
}
B01D 24/266
. . . .
{
the container having distribution or collection headers or pervious conduits
}
Collapse
B01D 24/28
.
with the filter bed moving during the filtration ( with the filter bed fluidised B01D 24/36 )
Collapse
B01D 24/30
. .
Translation
B01D 24/305
. . .
{
Vibrations
}
B01D 24/32
. .
Rotation
B01D 24/34
.
with the filtering material and its pervious support moving ( tipping buckets, trays or like sections B01D 33/327 )
B01D 24/36
.
with the filter bed fluidised during the filtration ( with the filter bed being stationary B01D 24/02 )
Collapse
B01D 24/38
.
Feed or discharge devices
B01D 24/383
. .
{
using multiple way valves
}
B01D 24/386
. .
{
internal recirculation
}
Collapse
B01D 24/40
. .
for feeding
B01D 24/402
. . .
{
containing fixed liquid displacement elements or cores
}
. . .
{
Special treatment of the feed stream before contacting the filtering material, e.g. cutting ( B01D 35/24 , B01D 37/02 , B01D 37/03 take precedence )
}
B01D 24/407
. . .
{
provoking a tangential stream
}
Collapse
B01D 24/42
. .
for discharging filtrate
B01D 24/425
. . .
{
containing fixed liquid displacement elements or cores
}
B01D 24/44
. .
for discharging filter cake, e.g. chutes
Collapse
.
Regenerating the filtering material in the filter ( B01D 24/44 takes precedence )
Collapse
. .
{
by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer ( B01D 24/4631 takes precedence )
}
B01D 24/461
. . .
{
by scrapers
}
B01D 24/4615
. . .
{
by brushes
}
B01D 24/4621
. . .
{
by nozzles acting on the cake side of the filter material, or by fluids acting in co-current direction with the feed stream
}
B01D 24/4626
. .
{
Construction of spray heads specially adapted for regeneration of the filter material or for filtrate discharging
}
Collapse
B01D 24/4631
. .
{
Counter-current flushing, e.g. by air
}
B01D 24/4636
. . .
{
with backwash shoes; with nozzles
}
Collapse
B01D 24/4642
. . .
{
with valves, e.g. rotating valves
}
B01D 24/4647
. . . .
{
with a rectilinear movement of the closing means
}
B01D 24/4652
. . .
{
by using gasbumps
}
B01D 24/4657
. . .
{
by using membranes
}
B01D 24/4663
. . .
{
by using pistons
}
Collapse
. .
{
by moving the filtering element ( B01D 24/4605 and B01D 24/4631 take precedence )
}
B01D 24/4673
. . .
{
using rotary devices or vibration mechanisms, e.g. stirrers
}
B01D 24/4678
. . .
{
using free vortex flow
}
B01D 24/4684
. . .
{
using spray devices
}
B01D 24/4689
. . .
{
Displacement of the filtering material to a compartment of the filtering device for regeneration
}
B01D 24/4694
. .
{
containing filter material retaining means ( e.g. screens, balls ) placed on the surface of the filter material
}
Collapse
B01D 24/48
.
integrally combined with devices for controlling the filtration
Collapse
B01D 24/4807
. .
{
Handling the filter cake for purposes other than regenerating
}
B01D 24/4815
. . .
{
for washing
}
Collapse
B01D 24/4823
. . .
{
for drying
}
B01D 24/483
. . . .
{
by compression
}
B01D 24/4838
. . . .
{
by gases or by heating
}
. . .
{
Retarding cake deposition on the filter during the filtration period, e.g. using stirrers ( B01D 24/407 takes precedence )
}
B01D 24/4853
. .
{
by clearness or turbidity measuring
}
B01D 24/4861
. .
{
by flow measuring
}
B01D 24/4869
. .
{
by level measuring
}
. .
{
in which the filtering elements are moved between filtering operations; particular measures for removing or replacing the filtering elements ( B01D 24/46 , B01D 24/4807 take precedence )
}
B01D 24/4884
. .
{
by pressure measuring
}
B01D 24/4892
. .
{
by temperature measuring
}
Collapse
Filters formed by clamping together several filtering elements or parts of such elements ( disc filters B01D 29/39 )
NOTE
-
See WARNING after subclass title, particularly items (7), (8), (12), (13) and (14)

.
{
Making filtering elements ( not provided for elsewhere; see also B01D 24/001 , B01D 27/005 , B01D 29/012 , B01D 29/111 , B01D 33/0093 )
}
.
{
Clamping devices ( B01D 25/12 and subgroups take precedence )
}
Collapse
B01D 25/003
.
{
integrally combined with devices for controlling the filtration
}
B01D 25/004
. .
{
by clearness or turbidity measuring
}
B01D 25/005
. .
{
by flow measuring
}
B01D 25/006
. .
{
by level measuring
}
B01D 25/007
. .
{
by pressure measuring
}
B01D 25/008
. .
{
by temperature measuring
}
B01D 25/02
.
in which the elements are pre-formed independent filtering units, e.g. modular systems
B01D 25/04
.
with screens or sheets, e.g. cloths, paper ( B01D 25/12 takes precedence )
B01D 25/06
.
with loose, granular of fibrous filtering material
B01D 25/08
.
with rigid self-supporting filtering elements
B01D 25/10
.
in which the suspended particles form the filtering medium
Collapse
B01D 25/12
.
Filter presses, i.e. of the plate and frame type
{
( filter presses in which the liquid is removed by pressing-out solid matter B30B )
}
B01D 25/121
. .
{
with bandshaped filtering elements intermittently entrained between the press plates, the lateral sides of the elements being clamped between two successive plates or between a plate and a successive frame during the filtration period, e.g. zigzag endless filter belts
}
B01D 25/122
. .
{
Construction of the plates
}
B01D 25/124
. .
{
Pressing-out operation after filtration, e.g. of the cake ( presses in general B30 )
}
B01D 25/125
. .
{
Opening and/or closing and/or pressure applying devices or means
}
Collapse
. .
with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands ( B01D 25/172 , B01D 25/176 , B01D 25/19 take precedence )
B01D 25/1275
. . .
{
the plates or the frames being placed in a non-vertical position
}
B01D 25/14
. .
Clamping means
{
clamping of filter cloth or similar securing means
}
Collapse
B01D 25/16
.
Edge filtering elements, i.e. using contiguous impervious surfaces
Collapse
B01D 25/164
. .
Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates ( B01D 25/127 , B01D 25/172 , B01D 25/176 , B01D 25/19 take precedence )
B01D 25/1645
. . .
{
the plates being placed in a non-vertical position
}
B01D 25/172
. .
Plate spreading means ( removal of filter cakes B01D 25/32 )
B01D 25/176
. .
attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates
B01D 25/18
. .
of flat, stacked bodies
B01D 25/19
. .
Clamping means for closing the filter press, e.g. hydraulic jacks
B01D 25/20
. .
of spirally or helically wound bodies
Collapse
. .
Plate and frame presses ( B01D 25/172 , B01D 25/176 , B01D 25/19 take precedence )
B01D 25/215
. . .
{
Construction of the filter plates, frames
}
Collapse
B01D 25/22
.
Cell-type filters
B01D 25/24
. .
Cell-type roll filters
B01D 25/26
. .
Cell-type stack filters
Collapse
B01D 25/28
.
Leaching or washing filter cakes in the filter
{
handling the filter cake for purposes other than regenerating
}
B01D 25/281
. .
{
specially for chamber filter presses
}
Collapse
B01D 25/282
. .
{
for drying
}
B01D 25/284
. . .
{
by gases or by heating
}
B01D 25/285
. . .
{
by compression using inflatable membranes
}
B01D 25/287
. . .
{
by compression using pistons
}
B01D 25/288
. .
{
Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
}
Collapse
B01D 25/30
.
Feeding devices;
{
Discharge devices
}
B01D 25/302
. .
{
specially adapted for chamber filter presses
}
B01D 25/305
. .
{
for discharging filtrate
}
. .
{
with internal recirculation through the filtering element ( B01D 37/02 takes precedence )
}
Collapse
B01D 25/32
.
Removal of the filter cakes
B01D 25/322
. .
{
specially for chamber filter presses
}
Collapse
B01D 25/325
. .
{
counter-current flushing, e.g. by air bumps
}
B01D 25/327
. . .
{
with backwash shoes, with nozzles
}
Collapse
. .
by moving,
{
e.g. rotating,
}
the filter elements
{
( B01D 25/172 , B01D 25/19 take precedence )
}
. . .
{
Particular measures for replacing or isolating one or more filtering elements; Transport systems for the filtering apparatus ( B01D 25/28 , B01D 25/32 , B01D 25/346 , B01D 25/36 take precedence )
}
B01D 25/346
. . .
{
by vibration
}
B01D 25/36
. . .
by centrifugal force
Collapse
B01D 25/38
. .
by moving parts, e.g. scrapers, contacting stationary filter elements
{
sprayers
}
B01D 25/383
. . .
{
Brushes
}
B01D 25/386
. . .
{
Nozzles
}
Collapse
Cartridge filters of the throw-away type
NOTE
-
See WARNING after subclass title, particularly item (14)

B01D 27/005
.
{
Making filter elements ( not provided for elsewhere ) ( see also B01D 24/001 , B01D 25/001 , B01D 29/012 , B01D 29/111 , B01D 33/0093 )
}
B01D 27/02
.
with cartridges made from a mass of loose
{
granular or fibrous
}
material
Collapse
B01D 27/04
.
with cartridges made of a piece of unitary material, e.g. filter paper
Collapse
B01D 27/06
. .
with corrugated, folded or wound material
B01D 27/07
. . .
having a coaxial stream through the filtering element
B01D 27/08
.
Construction of the casing
Collapse
B01D 27/10
.
Safety devices, e.g. by-passes
B01D 27/101
. .
{
Filter condition indicators
}
B01D 27/103
. .
{
Bypass or safety valves
}
B01D 27/105
. .
{
Bidirectional working filters
}
B01D 27/106
. .
{
Anti-leakage or anti-return valves
}
B01D 27/108
. .
{
Flow control valves; Damping or calibrated passages
}
Collapse
B01D 27/14
.
having more than one filtering element
Collapse
B01D 27/142
. .
{
connected in parallel
}
B01D 27/144
. . .
{
arranged concentrically or coaxially
}
Collapse
B01D 27/146
. .
{
connected in series
}
B01D 27/148
. . .
{
arranged concentrically or coaxially
}
Collapse
Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
{
( B01D 24/00 , B01D 25/00 and B01D 27/00 take precedence )
}
NOTE
-
See WARNING after subclass title, particularly items (7), (8), (9), (10) ,(12) and (14)

Collapse
B01D 29/0002
.
{
Aspects of other filters with filtering elements stationary during filtration, or of filtering elements thereof
}
Collapse
B01D 29/0004
. .
{
Filters with flat filtering elements
}
B01D 29/0006
. . .
{
Making filtering elements
}
B01D 29/0009
. . .
{
with curved filtering elements
}
B01D 29/0011
. . .
{
ring shaped
}
Collapse
B01D 29/0013
. .
{
Filters in which the filtering elements are moved between filtering operations; Means specially adapted for removing the filtering elements or introducing new ones; Transport systems specially adapted for the filtering elements
}
B01D 29/0015
. . .
{
Filtering bands
}
Collapse
B01D 29/0018
. .
{
Filters with screens or sheets, e.g. cloth, paper
}
B01D 29/002
. . .
{
with rigid, self-supporting filtering elements, e.g. of ceramic material
}
Collapse
B01D 29/0022
. . .
{
Filters with corrugated, folded, or wound sheets
}
B01D 29/0025
. . . .
{
allowing a coaxial stream through the filtering element ( for cartridge filters B01D 27/06 )
}
B01D 29/0027
. .
{
Filters with loose, granular, or fibrous filtering material
}
Collapse
B01D 29/0029
. .
{
Bag, cage, hose, tube, sleeve, or like filters
}
B01D 29/0031
. . .
{
Pressing-out operation after filtration, e.g. by means of membranes ( filter presses per se B01D 25/12 )
}
Collapse
B01D 29/0034
. . .
{
Filters having flexible filtering material
}
Collapse
B01D 29/0036
. . . .
{
which is supported
}
B01D 29/0038
. . . . .
{
on solid frames with surface grooves and the like
}
B01D 29/004
. . . . .
{
to take up a concertina shape during filtration
}
Collapse
B01D 29/0043
. . .
{
having rigid self-supporting filtering material ( B01D 29/0068 takes precedence )
}
B01D 29/0045
. . . .
{
Edge filtering elements
}
Collapse
B01D 29/0047
. . .
{
with multiple filtering units
}
B01D 29/005
. . . .
{
connected in parallel ( B01D 29/0056 takes precedence )
}
B01D 29/0052
. . . .
{
connected in series ( B01D 29/0059 takes precedence )
}
Collapse
B01D 29/0054
. . . .
{
arranged concentrically or coaxially
}
B01D 29/0056
. . . . .
{
connected in parallel
}
B01D 29/0059
. . . . .
{
connected in series
}
B01D 29/0061
. . .
{
which are vibrated
}
B01D 29/0063
. . .
{
which are open-ended
}
B01D 29/0065
. . .
{
Filter candles
}
Collapse
B01D 29/0068
. .
{
Filters with hollow discs side-by-side on or around one or more tubes ( with elements moving during filtration B01D 33/0048 , B01D 33/0051 )
}
B01D 29/007
. . .
{
having filtrate discharge tubes fixed non-perpendicularly to the filtering surfaces
}
B01D 29/0072
. .
Filters integrally combined with devices for controlling the filtration ( for shutting-off elements or changing over from one element to another B01D 35/12 , B01D 35/14 ; controlling filtration processes B01D 37/04 )
Collapse
B01D 29/0075
. .
{
Regeneration of the filtering material in the filter ( for two separate filter elements placed in different units B01D 35/12 )
}
B01D 29/0077
. . .
{
by scrapers, brushes, nozzles or the like placed on the cake-side of the filters ( B01D 29/0084 takes precedence )
}
Collapse
B01D 29/0079
. . .
{
Counter-current flushing, e.g. by air bumps
}
B01D 29/0081
. . . .
{
with backwash shoes; with nozzles
}
Collapse
B01D 29/0084
. . .
{
by moving the filter element ( B01D 29/0088 takes precedence )
}
B01D 29/0086
. . . .
{
by vibration
}
B01D 29/0088
. . .
{
by centrifugal force
}
B01D 29/009
. .
{
Filters having feed or discharge devices
}
B01D 29/0093
.
{
Making filtering elements ( not provided for elsewhere ) ( see also B01D 23/005 , B01D 25/001 , B01D 27/005 )
}
B01D 29/0095
.
{
Flat filtering elements ( B01D 25/12 , B01D 25/26 , B01D 29/0015 , B01D 29/0068 take precedence )
}
B01D 29/0097
.
{
Curved filtering elements, e.g. concave filtering elements
}
Collapse
B01D 29/01
.
with flat filtering elements ( B01D 29/39 takes precedence )
NOTE
-
If the construction of the filtering element itself is of minor importance the document is classified in the subgroups B01D 29/01 , B01D 29/014 , B01D 29/016 or B01D 29/018 ; otherwise in the subgroups B01D 29/03 to B01D 29/07

B01D 29/012
. .
{
Making filtering elements ( making bag, cage, hose, tube, sleeve or like filtering elements B01D 29/111 )
}
B01D 29/014
. .
{
with curved filtering elements ( construction B01D 29/035 , B01D 29/071 )
}
B01D 29/016
. .
{
with corrugated, folded or wound filtering elements
}
B01D 29/018
. .
{
ring shaped
}
Collapse
B01D 29/03
. .
self-supporting
B01D 29/031
. . .
{
with corrugated, folded filtering elements
}
B01D 2029/033
. . .
{
bar screens
}
B01D 29/035
. . .
{
with curved filtering elements
}
Collapse
B01D 29/036
. . .
{
ring shaped
}
B01D 29/038
. . . .
{
with corrugated, folded filtering elements
}
Collapse
B01D 29/05
. .
supported
B01D 29/055
. . .
{
ring shaped
}
Collapse
B01D 29/07
. . .
with corrugated, folded or wound filtering sheets
. . . .
{
with curved filtering elements ( B01D 29/072 , B01D 29/073 take precedence )
}
B01D 29/072
. . . .
{
ring shaped
}
B01D 29/073
. . . .
{
with wound filtering sheets
}
B01D 2029/075
.
{
Located in a closed housing and comprising scrapers or agitators on the cake side of the filtering elements, e.g. Nutsche- or Rosenmund-type filters for performing multiple step operations
}
B01D 29/085
.
Funnel filters ; Holders therefor
Collapse
.
with filtering bands, e.g. movable between filtering operations
{
( B01D 25/121 takes precedence )
}
B01D 29/093
. .
{
combined with means to fasten the opposite edges of the filtering band together, e.g. Zipper
}
B01D 29/096
. .
{
Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
}
Collapse
B01D 29/11
.
with bag, cage, hose, tube, sleeve or like filtering elements
NOTE
-
If the construction of the filtering element itself is of minor importance the document is classified in the subgroups B01D 29/11 , B01D 29/114 and B01D 29/117 , otherwise in the subgroups B01D 29/13 to B01D29/37

B01D 29/111
. .
{
Making filtering elements
}
B01D 29/112
. .
{
Ring shaped filters wherein both opposite axial sides are opened and the axial length is shorter than the diameter, e.g. as used in hydraulic transmission systems
}
Collapse
. .
{
arranged for inward flow filtration ( B01D 29/15 , B01D 29/33 take precedence )
}
B01D 29/115
. . .
{
open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
}
Collapse
. .
{
arranged for outward flow filtration ( B01D 29/23 , B01D 29/35 take precedence )
}
B01D 29/118
. . .
{
open-ended
}
Collapse
B01D 29/13
. .
Supported filter elements
Collapse
B01D 29/15
. . .
arranged for inward flow filtration
B01D 29/17
. . . .
open-ended
{
the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
}
B01D 29/19
. . . .
on solid frames with surface grooves or the like
Collapse
B01D 29/21
. . . .
with corrugated, folded or wound sheets
B01D 29/213
. . . . .
{
having a concertina shape
}
B01D 29/216
. . . . .
{
with wound sheets
}
Collapse
B01D 29/23
. . .
arranged for outward flow filtration
Collapse
B01D 29/232
. . . .
{
with corrugated, folded or wound sheets
}
B01D 29/235
. . . . .
{
having a concertina shape
}
B01D 29/237
. . . . .
{
with wound sheets
}
B01D 29/25
. . . .
open-ended
{
the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
}
B01D 29/27
. . . .
Filter bags
Collapse
B01D 29/31
. .
Self-supporting filtering elements
Collapse
B01D 29/33
. . .
arranged for inward flow filtration
B01D 29/333
. . . .
{
with corrugated, folded filtering elements
}
B01D 29/336
. . . .
{
open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
}
Collapse
B01D 29/35
. . .
arranged for outward flow filtration
B01D 29/353
. . . .
{
with corrugated, folded filtering elements
}
B01D 29/356
. . . .
{
open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
}
Collapse
B01D 29/39
.
with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
B01D 29/395
. .
{
mounted axially on the tube
}
Collapse
B01D 29/41
. .
mounted transversely on the tube
B01D 29/413
. . .
{
divided in sectors
}
B01D 29/416
. . .
{
Filtering tables
}
B01D 29/43
. .
mounted otherwise than transversely on the tube
{
mounted otherwise than axially on the tube
}
Collapse
B01D 29/44
.
Edge filtering elements, i.e. using contiguous impervious surfaces
B01D 29/445
. .
{
Bar screens
}
B01D 29/46
. .
of flat, stacked bodies
B01D 29/48
. .
of spirally or helically wound bodies
Collapse
.
with multiple filtering elements, characterised by their mutual disposition ( B01D 29/39 takes precedence )
Collapse
B01D 29/52
. .
in parallel connexion
B01D 29/54
. . .
arranged concentrically or coaxially
Collapse
B01D 29/56
. .
in series connexion
B01D 29/58
. . .
arranged concentrically or coaxially
Collapse
B01D 29/60
.
integrally combined with devices for controlling the filtration
B01D 29/601
. .
{
by clearness or turbidity measuring
}
B01D 29/603
. .
{
by flow measuring
}
B01D 29/605
. .
{
by level measuring
}
B01D 29/606
. .
{
by pressure measuring
}
B01D 29/608
. .
{
by temperature measuring
}
Collapse
B01D 29/62
.
Regenerating the filter material in the filter ( devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D 35/12 )
Collapse
B01D 29/64
. .
by scrapers, brushes,
{
nozzles
}
, or the like, acting on the cake side of the filtering element
Collapse
B01D 29/6407
. . .
{
brushes
}
B01D 29/6415
. . . .
{
with a rotary movement with respect to the filtering element
}
B01D 29/6423
. . . .
{
with a translational movement with respect to the filtering element
}
B01D 29/643
. . . .
{
with a combination of movements with respect to the filtering elements
}
Collapse
B01D 29/6438
. . .
{
nozzles
}
B01D 29/6446
. . . .
{
with a rotary movement with respect to the filtering element
}
B01D 29/6453
. . . .
{
with a translational movement with respect to the filtering element
}
B01D 29/6461
. . . .
{
with a combination of movements with respect to the filtering elements
}
Collapse
B01D 29/6469
. . .
{
scrapers
}
B01D 29/6476
. . . .
{
with a rotary movement with respect to the filtering element
}
B01D 29/6484
. . . .
{
with a translatory movement with respect to the filtering element
}
B01D 29/6492
. . . .
{
with a combination of movements with respect to the filtering elements
}
Collapse
B01D 29/66
. .
by flushing, e.g. counter-current air-bumps
B01D 29/661
. . .
{
by using gas-bumps
}
B01D 29/663
. . .
{
by using membranes
}
B01D 29/665
. . .
{
by using pistons
}
B01D 29/666
. . .
{
by a stirrer placed on the filtrate side of the filtering element
}
B01D 29/668
. . .
{
with valves, e.g. rotating valves for coaxially placed filtering elements
}
NOTE
-
the subgroup covers only counter-current flushing

Collapse
B01D 29/68
. . .
with backwash arms, shoes or nozzles
B01D 29/682
. . . .
{
with a rotary movement with respect to the filtering element
}
B01D 29/684
. . . .
{
with a translatory movement with respect to the filtering element
}
B01D 29/686
. . . .
{
with a combination of movements with respect to the filtering elements
}
B01D 29/688
. . . .
{
with backwash arms or shoes acting on the cake side
}
Collapse
B01D 29/70
. .
by forces created by movement of the filter element
B01D 29/705
. . .
{
by compression of compressible filter medium, e.g foam
}
B01D 29/72
. . .
involving vibrations
B01D 29/74
. . .
involving centrifugal force
Collapse
.
Handling the filter cake in the filter for purposes other than for regenerating ( B01D 29/94 takes precedence )
B01D 29/78
. .
for washing
Collapse
B01D 29/80
. .
for drying
Collapse
B01D 29/82
. . .
by compression
B01D 29/822
. . . .
{
using membranes
}
B01D 29/824
. . . .
{
using pistons
}
B01D 29/826
. . . .
{
using rollers
}
. . . .
{
using screws ( B01D 29/6476 takes precedence )
}
Collapse
B01D 29/84
. . .
by gases or by heating
B01D 29/843
. . . .
{
by direct contact with a fluid
}
B01D 29/846
. . . .
{
by indirect heat-exchange
}
Collapse
. .
Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
{
( B01D 29/908 takes precedence )
}
B01D 29/865
. . .
{
by vibration of the liquid
}
Collapse
B01D 29/88
.
having feed or discharge devices
. .
{
with internal recirculation through the filtering element ( B01D 37/02 takes precedence )
}
Collapse
B01D 29/90
. .
for feeding
B01D 29/902
. . .
{
containing fixed liquid displacement elements or cores
}
. . .
{
directing the mixture to be filtered on the filtering element in a manner to clean the filter continuously ( B01D 29/115 , B01D 29/118 , B01D 29/17 , B01D 29/25 , B01D 29/336 , B01D 29/356 , B01D 29/902 , B01D 29/908 take precedence )
}
. . .
{
Special treatment of the feed stream before contacting the filtering element, e.g. cutting ( B01D 35/24 , B01D 37/02 , B01D 37/03 take precedence )
}
B01D 29/908
. . .
{
provoking a tangential stream
}
Collapse
B01D 29/92
. .
for discharging filtrate
B01D 29/925
. . .
{
containing liquid displacement elements or cores
}
Collapse
B01D 29/94
. .
for discharging the filter cake, e.g. chutes
B01D 29/945
. . .
{
for continuously discharging concentrated liquid
}
Collapse
.
in which the filtering elements are moved between filtering operations ; Particular measures for removing or replacing the filtering elements ; Transport systems for filters ( B01D 29/09 , B01D 29/70 take precedence )
B01D 29/965
. .
{
Device for changing the inclination of the filtering element
}
Collapse
Filters with filtering elements which move during the filtering operation ( filters comprising loose filtering material moving or fluidised during filtration B01D 24/28 to B01D 24/36 ; centrifuges B04B )
NOTE
-
See WARNING after subclass title, particularly items (7), (8), (11) and (14)

Collapse
B01D 33/0003
.
{
Aspects of filters with filtering elements which move during the filtering operation
}
Collapse
B01D 33/0006
. .
{
with rotating filtering surfaces ( rotating brush filters B01D 35/10 )
}
Collapse
B01D 33/0009
. . .
{
with cylindrical filtering surfaces, e.g. hollow drums, rotating drum filters for paper making D21B
}
B01D 33/0012
. . . .
{
Drums provided with cells each independently connected with pressure distributor
}
Collapse
B01D 33/0016
. . . .
{
Drums with a single compartment
}
B01D 33/0019
. . . . .
{
arranged for outward flow filtration
}
Collapse
B01D 33/0022
. . . .
{
combined with filtering bands or the like
}
Collapse
B01D 33/0025
. . . . .
{
with endless filtering bands
}
B01D 33/0029
. . . . . .
{
with multiple filtering bands with or without one or more non filtering bands
}
B01D 33/0032
. . . .
{
with loose, granular, or fibrous filtering material
}
Collapse
B01D 33/0035
. . . .
{
Gravity filters
}
B01D 33/0038
. . . . .
{
with external feed
}
Collapse
B01D 33/0041
. . .
{
with plane surfaces
}
B01D 33/0045
. . . .
{
with rotary tables
}
B01D 33/0048
. . . .
{
with hollow discs transversely mounted on a hollow shaft
}
B01D 33/0051
. . . .
{
with hollow frames axially mounted on a hollow shaft
}
B01D 33/0054
. . . .
{
with loose, granular, or fibrous filtering material
}
B01D 33/0058
. . .
{
with filtering surfaces travelling along conveyers ( tipping bucket type B01D 35/08 ; brush filters B01D 35/10 )
}
Collapse
B01D 33/0061
. .
{
Accessories and components
}
Collapse
B01D 33/0064
. . .
{
Devices for handling the filter cake, e.g. washing, discharging
}
B01D 33/0067
. . . .
{
with scrapers, brushes, nozzles or the like placed on the cake-side of the filter ( B01D 33/0074 takes precedence )
}
Collapse
B01D 33/007
. . . .
{
counter-current flushing
}
B01D 33/0074
. . . . .
{
with backwash shoes, with nozzles
}
Collapse
B01D 33/0077
. . . .
{
by moving the filter element
}
B01D 33/008
. . . . .
{
by vibration
}
B01D 33/0083
. . . . .
{
by centrifugal force
}
B01D 33/0087
. . .
{
Feed or discharge devices for liquids
}
B01D 33/009
. . .
{
Pressure distribution systems ( pressure distribution systems for filters with tipping buckets or trays B01D 35/08 )
}
Collapse
B01D 33/0093
.
{
Making filter elements ( not provided for elsewhere ) ( see also B01D 24/001 , B01D 25/001 , B01D 27/005 , B01D 29/012 , B01D 29/111 )
}
B01D 33/0096
. .
{
moving rectilinearly ( filters B01D 35/10 )
}
Collapse
.
with translationally moving filtering elements, e.g. pistons ( B01D 33/04 to B01D 33/327 take precedence )
Collapse
B01D 33/0108
. .
{
with bag, cage, hose, tube, sleeve or the like filtering elements
}
Collapse
B01D 33/0116
. . .
{
arranged for inward flow filtration
}
B01D 33/0125
. . . .
{
open ended
}
Collapse
B01D 33/0133
. . .
{
arranged for outward flow filtration
}
B01D 33/0141
. . . .
{
open ended
}
Collapse
B01D 33/015
. .
{
with flat filtering elements
}
Collapse
B01D 33/0158
. . .
{
self-supporting
}
B01D 33/0166
. . . .
{
Bar screens
}
B01D 33/0175
. . . .
{
with curved filtering elements
}
Collapse
B01D 33/0183
. . .
{
supported
}
B01D 33/0191
. . . .
{
with corrugated, folded or wound filtering sheets
}
Collapse
B01D 33/03
. .
with vibrating filter elements
Collapse
B01D 33/0307
. . .
{
with bag, cage, hose, tube, sleeve or the like filtering elements
}
Collapse
B01D 33/0315
. . . .
{
arranged for inward flow filtration
}
B01D 33/0323
. . . . .
{
open ended
}
Collapse
B01D 33/033
. . . .
{
arranged for outward flow filtration
}
B01D 33/0338
. . . . .
{
open ended
}
Collapse
B01D 33/0346
. . .
{
with flat filtering elements
}
Collapse
B01D 33/0353
. . . .
{
self-supporting
}
B01D 33/0361
. . . . .
{
Bar screens
}
B01D 33/0369
. . . . .
{
with curved filtering elements
}
Collapse
B01D 33/0376
. . . .
{
supported
}
B01D 33/0384
. . . . .
{
with corrugated, folded or wound filtering sheets
}
B01D 33/0392
. . . . .
{
with curved filtering elements
}
Collapse
B01D 33/04
.
with filtering bands or the like supported on cylinders which are impervious for filtering
B01D 33/042
. .
{
whereby the filtration and squeezing-out take place between at least two filtering bands
}
Collapse
B01D 33/044
.
with filtering bands or the like supported on cylinders which are pervious for filtering
Collapse
B01D 33/048
. .
with endless filtering bands
B01D 2033/052
. . .
{
combined with a compression device
}
Collapse
B01D 33/056
.
Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
B01D 33/0565
. .
{
combined with means to fasten the opposite edges of the filtering band together, e.g. Zipper
}
Collapse
.
with rotary cylindrical filtering surfaces, e.g. hollow drums ( B01D 33/044 takes precedence;
{
rotating drums for paper-making D21B
}
)
B01D 33/067
. .
Construction of the filtering drums, e.g. mounting or sealing arrangements
B01D 2033/07
. .
{
arranged for inward flow filtration
}
Collapse
B01D 33/073
. .
arranged for inward flow filtration
B01D 33/09
. . .
with surface cells independently connected to pressure distributors
Collapse
B01D 33/11
. .
arranged for outward flow filtration
B01D 33/13
. . .
with surface cells independently connected to pressure distributors
Collapse
B01D 33/15
.
with rotary plane filtering surfaces
B01D 33/155
. .
{
the filtering surface being parallel to the rotation axis
}
Collapse
B01D 33/17
. .
with rotary filtering tables ( tables divided into separately tiltable buckets, trays or like sections B01D 33/327 )
B01D 33/19
. . .
the table surface being divided in successively tilted sectors or cells, e.g. for discharging the filter cake
Collapse
B01D 33/21
. .
with hollow filtering discs transversely mounted on a hollow rotary shaft
B01D 33/215
. . .
{
the filtering discs being fixed inwardly on a rotating construction
}
B01D 33/23
. . .
Construction of discs or component sectors thereof
B01D 33/25
. .
with hollow frames axially mounted on a hollow rotary shaft
Collapse
B01D 33/27
.
with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
B01D 33/275
. .
{
using contiguous impervious surfaces
}
Collapse
.
the movement of the filter elements being a combination of movements ( B01D 33/19 takes precedence )
B01D 33/31
. .
Planetary movement
B01D 33/327
. .
Tipping buckets, trays or like sections
B01D 33/333
.
with individual filtering elements moving along a closed path ( tipping buckets, trays or like sections B01D 33/327 )
Collapse
.
with multiple filtering elements characterised by their mutual disposition (
{
B01D 33/042
}
, B01D 33/21 take precedence )
Collapse
B01D 33/37
. .
in parallel connexion
B01D 33/39
. . .
concentrically or coaxially
Collapse
B01D 33/41
. .
in series connexion
B01D 33/42
. . .
concentrically or coaxially
Collapse
B01D 33/44
.
Regenerating the filter material in the filter ( devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D 35/12 )
Collapse
. .
by scrapers, brushes
{
nozzles
}
or the like acting on the cake-side of the filtering element
{
( B01D 33/503 takes precedence )
}
B01D 33/461
. . .
{
brushes
}
B01D 33/463
. . .
{
nozzles
}
B01D 33/465
. . .
{
take-off rollers
}
B01D 33/466
. . .
{
scrapers
}
B01D 33/468
. . .
{
wires, strands, strings or the like
}
Collapse
B01D 33/48
. .
by flushing, e.g. counter-current air-bumps
NOTE
-
the subgroup covers only counter-current flushing

Collapse
B01D 33/50
. . .
with backwash arms, shoes or nozzles
B01D 33/503
. . . .
{
the backwash arms, shoes acting on the cake side
}
B01D 33/506
. . . .
{
with a stirrer placed on the filtrate side
}
Collapse
B01D 33/52
. .
by forces created by movement of the filter element
B01D 33/54
. . .
involving vibrations
B01D 33/56
. . .
involving centrifugal force
Collapse
.
Handling the filter cake in the filter for purposes other than for regenerating ( B01D 33/76 takes precedence )
{
the filter cake remaining on the filtering element
}
B01D 33/60
. .
for washing
Collapse
B01D 33/62
. .
for drying
Collapse
B01D 33/64
. . .
by compression
B01D 33/642
. . . .
{
by pressure belts
}
B01D 33/644
. . . .
{
by pressure plates, membranes
}
B01D 33/646
. . . .
{
by pressure rollers
}
B01D 33/648
. . . .
{
by screws
}
Collapse
B01D 33/66
. . .
by gases or by heating
B01D 33/663
. . . .
{
by direct contact with a fluid
}
B01D 33/666
. . . .
{
by indirect heat-exchange
}
B01D 33/68
. .
Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
Collapse
.
having feed or discharge devices ( B01D 33/82 takes precedence )
B01D 33/705
. .
{
with internal recirculation through the filter
}
Collapse
B01D 33/72
. .
for feeding
B01D 33/722
. . .
{
containing fixed liquid displacement elements or cores
}
. . .
{
Special treatment of the feed stream before contacting the filtering element, e.g. cutting ( B01D 35/24 , B01D 37/02 , B01D 37/03 take precedence )
}
B01D 33/727
. . .
{
provoking a tangential stream
}
Collapse
B01D 33/74
. .
for discharging filtrate
B01D 33/742
. . .
{
containing fixed liquid displacement elements or cores
}
Collapse
B01D 33/745
. . .
{
Construction of suction casings, pans, or the like
}
B01D 33/747
. . . .
{
moving during the filtration period
}
Collapse
B01D 33/76
. .
for discharging the filter cake, e.g. chutes
B01D 33/763
. . .
{
for continuously discharging concentrated liquid
}
B01D 33/766
. . .
{
Devices for breaking the filter cake, e.g. cutting
}
Collapse
B01D 33/80
.
Accessories
B01D 33/801
. .
{
Driving means, shaft packing systems or the like
}
B01D 33/802
. .
{
Device for changing the inclination of the filtering element
}
. .
{
in which the filtering elements are moved between filtering operations ( B01D 33/52 takes precedence ) ; Particular measures for removing or replacing the filtering elements; Transport systems for filters
}
Collapse
B01D 33/804
. .
{
integrally combined with devices for controlling the filtration
}
B01D 33/805
. . .
{
by clearness or turbidity measuring
}
B01D 33/806
. . .
{
by flow measuring
}
B01D 33/807
. . .
{
by level measuring
}
B01D 33/808
. . .
{
by pressure measuring
}
B01D 33/809
. . .
{
by temperature measuring
}
B01D 33/82
. .
Means for pressure distribution
Collapse
Other filtering devices ; Auxiliary devices for filtration ; Filter housing constructions
NOTE
-
See WARNING after subclass title, particularly item (14)

B01D 35/005
.
{
Filters specially adapted for use in internal-combustion engine lubrication or fuel systems, not of special interest for B01D 23/00 - B01D 33/00 ( internal-combustion engine lubricating systems F02M ; lubrication in general F16N )
}
Collapse
.
Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, ( B01D 35/05 takes precedence;
{
water pipe system filters E03B 3/18 , E03B 7/07 ; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C 1/26 ; suction strainers or filters for pumps F04B 53/005 , F04D 29/70
}
)
B01D 35/023
. .
{
Filler pipe filters
}
Collapse
. .
rigidly mounted in or on tanks or reservoirs ( B01D 35/04 takes precedence )
B01D 35/0273
. . .
{
Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
}
B01D 35/0276
. . .
{
Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs
}
Collapse
B01D 35/04
. .
Plug, tap, or cock filters
{
filtering elements mounted in or on a faucet
}
B01D 35/043
. . .
{
Reversible faucet filters
}
B01D 35/046
. . .
{
the filtering element being mounted in the faucet plug
}
B01D 35/05
.
Floating filters
B01D 35/06
.
Filters making use of electricity or magnetism ( ultrafiltration, microfiltration B01D 61/14 ; electrodialysis, electro-osmosis B01D 61/42 ; devices comprising filters and magnetic separators B03C 1/30 )
B01D 35/08
.
Filters with tipping buckets or trays
B01D 35/10
.
Brush filters
{
Rotary brush filters
}
B01D 35/12
.
Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
Collapse
B01D 35/14
.
Safety devices specially adapted for filtration ( preventing or minimising fires or explosions A62C ) ; Devices for indicating clogging ( incorporated in a throw-away filter B01D 27/10 )
Collapse
B01D 35/143
. .
Filter condition indicators
B01D 35/1435
. . .
{
with alarm means
}
Collapse
B01D 35/147
. .
Bypass or safety valves
B01D 35/1475
. . .
{
Pressure relief valves or pressure control valves
}
B01D 35/15
. .
Bidirectional working filters
B01D 35/153
. .
Anti-leakage or anti-return valves
Collapse
B01D 35/157
. .
Flow control valves: Damping or calibrated passages
B01D 35/1573
. . .
{
Flow control valves
}
B01D 35/1576
. . .
{
Calibrated passages
}
B01D 35/16
.
Cleaning-out devices
{
e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
}
Collapse
B01D 35/18
.
Heating or cooling the filters
B01D 35/185
. .
{
comprising a vaporizing unit
}
B01D 35/20
.
Vibrating the filters ( regenerating filter material by vibrations in filters with stationary filtering elements B01D 29/72 ; discharging the filter cake by vibrations in filters with moving filtering elements B01D 33/54 , B01D 33/76 )
.
Directing the mixture to be filtered on to the filters in a manner to clean the filters
{
( B01D 29/904 takes precedence )
}
B01D 35/24
.
Providing loose granular material to scratch the filters clean
B01D 35/26
.
Filters with built-in pumps
{
filters provided with a pump mounted in or on the casing ( aquarium pumps or filters A01K 63/04 )
}
B01D 35/28
.
Strainers not provided for elsewhere
Collapse
B01D 35/30
.
Filter housing constructions
Collapse
. .
{
Constructions of two or more housings ( B01D 35/12 takes precedence )
}
B01D 35/303
. . .
{
the housings being modular, e.g. standardised
}
B01D 35/305
. .
{
with features related to crash tests or crash safety measures
}
B01D 35/306
. .
{
Filter mounting adapter
}
B01D 35/308
. .
{
Made of at least two different materials, e.g. metal and plastic
}
Collapse
B01D 35/31
. .
including arrangements for environmental protection, e.g. pressure resisting features
B01D 35/32
. . .
against radiation
. .
open-topped ( B01D 35/31 takes precedence )
Collapse
Filter circuits or combinations of filters with other separating devices
NOTE
-
See WARNING after subclass title, particularly item (14)

B01D 36/001
.
{
Filters in combination with devices for the removal of gas, air purge systems.
}
Collapse
.
{
Filters in combination with devices for the removal of liquids ( B01D 35/185 takes precedence )
}
B01D 36/005
. .
{
Liquid level sensing means, e.g. for water in gasoil-filters
}
B01D 36/006
. .
{
Purge means
}
B01D 36/008
. .
{
Means to filter or treat the separated liquid
}
.
Combinations of filters of different kinds ( B01D 29/50 , B01D 33/35 take precedence )
Collapse
B01D 36/04
.
Combinations of filters with settling tanks
B01D 36/045
. .
{
Combination of filters with centrifugal separation devices
}
Collapse
Processes of filtration ( processes specially adapted for filtering gases B01D 46/00 )
NOTE
-
See WARNING after subclass title, particularly item (14)

Collapse
B01D 37/02
.
Precoating the filter medium ; Addition of filter aids to the liquid being filtered
{
( devices for feeding reagents C02F 1/685 and sub-groups; filter aids )
}
B01D 37/025
. .
{
additives incorporated in the filter
}
B01D 37/03
.
using flocculating agents
Collapse
B01D 37/04
.
Controlling the filtration
NOTE
-
If the construction of the filtering element is of minor importance, the documents are classified in this group only

Filters integrally combined with devices for controlling the filtration are also classified in the relevant groups for these aspects, e.g. B01D 24/48 , B01D 29/60 , B01D 33/804

B01D 37/041
. .
{
by clearness or turbidity measuring
}
B01D 37/043
. .
{
by flow measuring
}
B01D 37/045
. .
{
by level measuring
}
B01D 37/046
. .
{
by pressure measuring
}
B01D 37/048
. .
{
by temperature measuring
}
Collapse
Filtering material for liquid or gaseous fluids
Collapse
B01D 39/02
.
Loose filtering material, e.g. loose fibres
B01D 39/04
. .
Organic material, e.g. cellulose, cotton
B01D 39/06
. .
Inorganic material, e.g. asbestos fibres, glass beads or fibres
Collapse
.
Filter cloth, i.e. woven, knitted or interlaced material ( metallic B01D 39/10 )
WARNING
-
Groups B01D 39/083 and B01D 39/086 are incomplete pending a reorganisation, see also B01D 39/08

B01D 39/083
. .
{
of organic material
}
B01D 39/086
. .
{
of inorganic material
}
Collapse
B01D 39/10
.
Filter screens essentially made of metal
B01D 39/12
. .
of wire gauze ; of knitted wire ; of expanded metal
Collapse
.
Other self-supporting filtering material;
{
Other filtering material ( non-woven fabrics in general D04H 3/00 )
}
Collapse
B01D 39/16
. .
of organic material, e.g. synthetic fibres
Collapse
. . .
{
the material being fibrous ( B01D 39/18 takes precedence )
}
B01D 39/1615
. . . .
{
of natural origin
}
Collapse
B01D 39/1623
. . . .
{
of synthetic origin
}
B01D 39/163
. . . . .
{
sintered or bonded
}
Collapse
B01D 39/1638
. . .
{
the material being particulate
}
B01D 39/1646
. . . .
{
of natural origin, e.g. cork or peat
}
Collapse
B01D 39/1653
. . . .
{
of synthetic origin
}
B01D 39/1661
. . . . .
{
sintered or bonded
}
Collapse
B01D 39/1669
. . .
{
Cellular material
}
B01D 39/1676
. . . .
{
of synthetic origin
}
B01D 39/1684
. . .
{
Wound filtering material
}
WARNING
-
This group is no longer used for classification of new documents as from December 1, 2011. The backlog of this group is being continuously reclassified to B01D 39/16 and B01D 2239/0695

B01D 39/1692
. . .
{
Other shaped material, e.g. perforated or porous sheets
}
. . .
the material being cellulose or derivatives thereof (
{
cork or peat B01D 39/1646
}
; making filter paper D21F 11/14 )
Collapse
. .
of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires ( porous ceramic material
{
C04B 38/00
}
; sintering metals C22C 1/04 ;
{
making porous sintered metal bodies B22F 3/10 , honeycomb filters B01D 46/2418 , materials used for filtering exhaust gases of an internal combustion engine F01N/022, ceramic honeycomb structures C04B 38/0006
}
)
Collapse
B01D 39/2003
. . .
{
Glass or glassy material
}
Collapse
B01D 39/2006
. . . .
{
the material being particulate
}
B01D 39/201
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2013
. . . . .
{
otherwise bonded, e.g. by resins
}
Collapse
B01D 39/2017
. . . .
{
the material being filamentary or fibrous
}
B01D 39/202
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2024
. . . . .
{
otherwise bonded, e.g. by resins
}
Collapse
B01D 39/2027
. . .
{
Metallic material
}
Collapse
B01D 39/2031
. . . .
{
the material being particulate
}
B01D 39/2034
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2037
. . . . .
{
otherwise bonded
}
Collapse
B01D 39/2041
. . . .
{
the material being filamentary or fibrous
}
B01D 39/2044
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2048
. . . . .
{
otherwise bonded
}
B01D 39/2051
. . . .
{
Metallic foam
}
Collapse
. . .
{
Carbonaceous material ( solid sorbent compositions comprising free carbon B01J 20/20 )
}
WARNING
-
Groups B01D 39/2058 to B01D 39/2065 are not complete, see also B01D 39/20

Collapse
B01D 39/2058
. . . .
{
the material being particulate
}
B01D 39/2062
. . . . .
{
Bonded, e.g. activated carbon blocks
}
B01D 39/2065
. . . .
{
the material being fibrous
}
Collapse
B01D 39/2068
. . .
{
Other inorganic materials, e.g. ceramics
}
Collapse
B01D 39/2072
. . . .
{
the material being particulate or granular
}
B01D 39/2075
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2079
. . . . .
{
otherwise bonded, e.g. by resins
}
Collapse
B01D 39/2082
. . . .
{
the material being filamentary or fibrous
}
B01D 39/2086
. . . . .
{
sintered or bonded by inorganic agents
}
B01D 39/2089
. . . . .
{
otherwise bonded, e.g. by resins
}
B01D 39/2093
. . . .
{
Ceramic foam
}
B01D 39/2096
. . .
{
Wound materials
}
WARNING
-
This group is no longer used for classification of new documents as from December 1, 2011. The backlog of this group is being continuously reclassified to B01D 39/20 and B01D 2239/0695

Collapse
Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
B01D 41/02
.
of loose filtering material
B01D 41/04
.
of rigid self-supporting filtering material
Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration ( flotation processes B03D 1/00 ; drying solid materials or objects F26B )
Collapse
Guide Heading:
Separating dispersed particles from gases or vapours ( suction cleaner filters A47L 9/10 ; filters for breathing-protection purposes A62B 23/00 ; filtering air for vehicles B60H 3/06 ; separating pneumatically-conveyed materials from propelling gas B65G 53/60 ; exhaust or silencing apparatus for machines or engines having means for removing solid constituents of exhaust F01N 3/02 ; air cleaners for the intakes of gas-turbine or jet-propulsion plants F02C 7/05 , of combustion engines F02M 35/024 , of compressors F04B 39/16 ; filtering in air-conditioning F24F 3/16 )
Collapse
Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
B01D 45/02
.
by utilising gravity
Collapse
.
by utilising inertia ( B01D 45/12 takes precedence )
B01D 45/06
. .
by reversal of direction of flow
Collapse
B01D 45/08
. .
by impingement against baffle separators
B01D 45/10
. . .
which are wetted
Collapse
B01D 45/12
.
by centrifugal forces ( centrifuges B04B ; cyclones B04C )
B01D 45/14
. .
generated by rotating vanes, discs, drums or brushes
B01D 45/16
. .
generated by the winding course of the gas stream,
{
the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
}
B01D 45/18
.
Cleaning-out devices
Collapse
Filters
{
i.e. particle separators
}
or filtering processes specially modified for separating dispersed particles from gases or vapours ( filtering elements B01D 23/00 to B01D 35/00 ; filtering material B01D 39/00 ; their regeneration outside the filters B01D 41/00 )
B01D 46/0001
.
{
Making filtering elements
}
Collapse
B01D 46/0002
.
{
Casings; Housings; Frame constructions
}
B01D 46/0004
. .
{
Details of removable closures, lids, caps or filter heads
}
Collapse
. .
{
Mounting of filtering elements within casings, housings or frames ( B01D 46/2422 takes precedence )
}
B01D 46/0006
. . .
{
Filter elements or cartridges installed in a drawer-like manner
}
B01D 46/0008
. . .
{
Two or more filter elements not fluidly connected positioned in the same housing
}
B01D 46/0009
. . .
{
Tray-like arrangements of filters in a vessel
}
B01D 46/001
. .
{
Means for connecting filter housings to supports
}
B01D 46/0012
. .
{
In-line filters
}
B01D 46/0013
. .
{
Modules
}
B01D 46/0015
. .
{
Throw-away type filters
}
B01D 46/0016
. .
{
Folded frame or housing constructions
}
B01D 46/0017
. .
{
Filter elements installed in a branch of a pipe, e.g. with an y-shaped tubular housing
}
Collapse
B01D 46/0019
.
{
with multiple filtering elements, characterised by their mutual disposition
}
Collapse
B01D 46/002
. .
{
connected in parallel
}
B01D 46/0021
. . .
{
arranged concentrically or coaxially
}
Collapse
B01D 46/0023
. .
{
connected in series
}
B01D 46/0024
. . .
{
arranged concentrically or coaxially
}
B01D 46/0026
. . .
{
Protecting screens at filter inlet or outlet
}
Collapse
B01D 46/0027
.
{
with additional separating or treating functions
}
B01D 46/0028
. .
{
provided with antibacterial or antifungal means
}
Collapse
B01D 46/003
. .
{
including coalescing means for the separation of liquid
}
B01D 46/0031
. . .
{
with collecting, draining means
}
B01D 46/0032
. .
{
using electrostatic forces to remove particles, e.g. electret filters
}
B01D 46/0034
. .
{
using magnetic forces to remove particles
}
B01D 46/0035
. .
{
by wetting, e.g. using surfaces covered with oil
}
B01D 46/0036
. .
{
by adsorption or absorption
}
B01D 46/0038
. .
{
with means for influencing the odor, e.g. deodorizing substances
}
Collapse
B01D 46/0039
.
{
with flow guiding by feed or discharge devices
}
Collapse
B01D 46/0041
. .
{
for feeding
}
B01D 46/0042
. . .
{
Use of the inlet flow in order to clean the filter surface
}
B01D 46/0043
. . .
{
containing fixed gas displacement elements or cores
}
B01D 46/0045
. . .
{
by using vanes
}
. . .
{
provoking a tangential stream ( B01D 46/0045 takes precedence )
}
Collapse
B01D 46/0047
. .
{
for discharging the filtered gas
}
B01D 46/0049
. . .
{
containing fixed gas displacement elements or cores
}
B01D 46/005
. .
{
Crossflow filtration, i.e. having an inlet and two outlets
}
Collapse
.
{
with filtering elements moving during filtering operation ( B01D 46/22 , B01D 46/32 take precedence )
}
B01D 46/0053
. .
{
with vibrating filtering elements
}
B01D 46/0054
. .
{
with translational movement
}
B01D 46/0056
. .
{
with rotational movement
}
Collapse
.
{
Regenerating the filter material in the filter ( B01D 46/04 , B01D 46/48 take precedence )
}
B01D 46/0058
. .
{
Devices for taking out of action one or more units of multi-unit filters
}
Collapse
B01D 46/006
. .
{
Chemical processes for the removal of the retained particles, e.g. by burning of processes
}
B01D 46/0061
. . .
{
making use of catalysts
}
B01D 46/0063
. . .
{
by heating only
}
Collapse
B01D 46/0064
. .
{
by means of acting on the cake side and moving with respect to the filtering elements
}
B01D 46/0065
. . .
{
by scrapers, brushes, nozzles or the like
}
Collapse
B01D 46/0067
. .
{
by acting counter-currently on the filtering surface ( e.g. flushing )
}
Collapse
B01D 46/0068
. . .
{
with pressurised gas, e.g. pulsed air
}
B01D 46/0069
. . . .
{
Using pressurized gas at supersonic velocities
}
B01D 46/0071
. . .
{
with backwash arms, shoes or nozzles
}
Collapse
B01D 46/0072
. .
{
by forces created by movement of the filter element
}
B01D 46/0073
. . .
{
involving contrifugal forces
}
Collapse
B01D 46/0075
. . .
{
involving vibrations or shaking
}
B01D 46/0076
. . . .
{
involving sonic or ultrasonic waves
}
B01D 46/0078
. .
{
by electrical means, e.g. for the generation of electrostatic forces in order to reject particles
}
B01D 46/0079
. .
{
by other means not moving with respect to the filtering elements, e.g. fixed nozzles on the cake side
}
B01D 46/008
. .
{
Replacing filter elements
}
B01D 46/0082
. .
{
Washing the filter inside the filter housing
}
B01D 46/0083
. .
{
Cleaning the filter surface by interrupting suction so that the filter cake falls by gravity
}
Collapse
B01D 46/0084
.
{
provided with safety means
}
B01D 46/0086
. .
{
Filter condition indicators
}
B01D 46/0087
. .
{
Bypass or safety valves
}
B01D 46/0089
. .
{
Anti-return means
}
B01D 46/009
. .
{
Identification of filter type or position thereof, e.g. by transponders or bar codes
}
Collapse
B01D 46/0091
. .
{
Including arrangements for environmental or personal protection
}
B01D 46/0093
. . .
{
against fire or explosion
}
B01D 46/0094
. . .
{
against radiation
}
B01D 46/0095
. .
{
Means acting upon failure of the filtering system, e.g. in case of damage of the filter elements; Failsafes
}
B01D 46/0097
. .
{
Special means for preventing bypass around the filter, i.e. in addition to usual seals
}
B01D 46/0098
. .
{
Protecting coverages on the filter which is removed before the filter is used, protection of filter, packaging
}
Collapse
B01D 46/02
.
Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
B01D 46/023
. .
{
Pockets filters, i.e. multiple bag filters mounted on a common frame
}
B01D 46/026
. .
{
Means for maintaining a space between filters, e.g. avoiding contact between adjacent filters
}
B01D 46/04
. .
Cleaning filters
Collapse
B01D 46/06
. .
with means keeping the working surfaces flat
B01D 46/08
. . .
the working surfaces forming a star shape
Collapse
B01D 46/10
.
Particle separators, e.g. dust precipitators, using filter plates, sheets, or pads having plane surfaces,
{
i.e. axial filtering
}
B01D 46/103
. .
{
Curved filtering elements
}
B01D 46/106
. .
{
Ring-shaped filtering elements
}
Collapse
B01D 46/12
. .
in multiple arrangements
B01D 46/125
. . .
{
V-type arrangements
}
B01D 46/14
. .
arranged in a star shape
B01D 46/16
. .
arranged on non-filtering conveyers
{
or supports
}
Collapse
B01D 46/18
.
Particle separators, e.g. dust precipitators, using filtering belts
B01D 46/185
. .
{
Construction of filtering belts or supporting belts including devices for centering, mounting or sealing thereof
}
B01D 46/20
. .
the belts combined with drums
B01D 46/22
. .
the belts travelling during filtering
Collapse
B01D 46/24
.
Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
Collapse
B01D 46/2403
. .
{
characterised by the physical shape or structure of the filtering element
}
B01D 46/2407
. . .
{
Filter candles
}
Collapse
B01D 46/2411
. . .
{
Filter cartridges
}
B01D 46/2414
. . . .
{
End caps including additional functions or special forms
}
Collapse
B01D 46/2418
. . .
{
Honeycomb filters ( used for filtering exhaust gases of an internal combustion engine F01N 3/022 ; ceramic honeycomb structures per se C04B 38/0006 )
}
B01D 46/2422
. . . .
{
Mounting of the body within a housing
}
Collapse
B01D 46/2425
. . . .
{
characterized by parameters related to the physical properties of the honeycomb structure material, e.g. modulus of rupture, porosity
}
Collapse
B01D 46/2429
. . . . .
{
of the honeycomb walls or cells
}
B01D 2046/2433
. . . . . .
{
Porosity
}
B01D 2046/2437
. . . . . .
{
Pore diameter
}
B01D 46/244
. . . . .
{
of the plugs
}
B01D 46/2444
. . . . .
{
of the outer peripheral sealing
}
B01D 46/2448
. . . . .
{
of the adhesive layers, i.e. joints between segments
}
Collapse
B01D 46/2451
. . . .
{
characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure, e.g. thickness, cell density
}
B01D 46/2455
. . . . .
{
of the whole honeycomb or segments, e.g. elliptic body, octagonal segment, centre of gravity
}
B01D 46/2459
. . . . .
{
of the plugs, e.g. projections, gaps, length
}
B01D 46/2462
. . . . .
{
the outer peripheral sealing, e.g. undulations, thickness
}
B01D 46/2466
. . . . .
{
of the adhesive layers, i.e. joints between segments, e.g. undulations, thickness
}
B01D 46/247
. . . . .
{
of the cells, e.g. diamonds, hexagonal configuration, cell density
}
B01D 46/2474
. . . . .
{
of the walls along the length of the honeycomb, e.g. inclination from inlet to outlet, length, thickness
}
B01D 2046/2477
. . . . .
{
Triangular shapes or configurations
}
B01D 2046/2481
. . . . .
{
Quadrangular shapes or configurations, e.g. square, diamond
}
B01D 2046/2485
. . . . .
{
Octagonal shapes or configurations
}
B01D 2046/2488
. . . . .
{
Circular shapes or configurations
}
B01D 2046/2492
. . . . .
{
Other shapes or configurations not covered by groups B01D 46/2474 to B01D 2046/2488
}
B01D 2046/2496
. . . .
{
The honeycomb filter being defined by mathematical equations
}
B01D 46/26
. .
rotatable
B01D 46/28
.
Particle separators, e.g. dust precipitators, using filter brushes
Collapse
B01D 46/30
.
Particle separators, e.g. dust precipitators, using loose filtering material
Collapse
B01D 46/32
. .
the material moving during filtering
B01D 46/34
. . .
not horizontally, e.g. using shoots
B01D 46/36
. . .
as a substantially horizontal layer, e.g. on rotary tables, drums, conveyer belts
B01D 46/38
. . .
as fluidised bed
Collapse
B01D 46/40
.
Particle separators, e.g. dust precipitators, using edge filters, i.e. using contiguous impervious surfaces
B01D 46/403
. .
{
of helically or spirally wound bodies
}
B01D 46/406
. .
{
of stacked bodies
}
Collapse
B01D 46/42
.
Auxiliary equipment or operation thereof
B01D 46/4209
. .
{
Prevention of static charge, e.g. by grounding
}
B01D 46/4218
. .
{
Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
}
B01D 46/4227
. .
{
Manipulating filters or filter elements, e.g. handles or extracting tools
}
B01D 46/4236
. .
{
Reducing noise or vibration emissions
}
B01D 46/4245
. .
{
Means for power supply or devices using electrical power in filters or filter elements
}
B01D 46/4254
. .
{
Allowing or improving visual supervision, e.g. lamps, transparent parts, windows
}
B01D 46/4263
. .
{
Means for active heating or cooling
}
B01D 46/4272
. .
{
Special valve constructions adapted to filters or filter elements
}
B01D 46/4281
. .
{
Venturi's or systems showing a venturi effect
}
B01D 46/429
. .
{
Means for wireless communication
}
Collapse
B01D 46/44
. .
controlling filtration
B01D 46/442
. . .
{
by measuring the concentration of particles
}
B01D 46/444
. . .
{
by flow measuring
}
B01D 46/446
. . .
{
by pressure measuring
}
B01D 46/448
. . .
{
by temperature measuring
}
B01D 46/46
. . .
automatic
B01D 46/48
. .
Removing dust other than cleaning filters
{
e.g. by using collecting trays
}
B01D 46/50
. .
Means for discharging electrostatic potential
Collapse
B01D 46/52
.
Particle separators, e.g. dust precipitators, using filters embodying folded
{
corrugated or wound sheet
}
material
Collapse
B01D 46/521
. .
{
using folded, pleated material
}
B01D 46/522
. . .
{
with specific folds, e.g. having different lengths
}
B01D 46/523
. . .
{
with means for maintaining spacing between the pleats or folds
}
Collapse
B01D 46/525
. . .
{
which comprises flutes
}
B01D 46/526
. . . .
{
in stacked arrangement
}
B01D 46/527
. . . .
{
in wound arrangement
}
. .
{
using wound sheets ( B01D 46/527 takes precedence )
}
Collapse
B01D 46/54
.
Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
B01D 46/543
. .
{
using membranes
}
B01D 46/546
. .
{
using nano- or microfibres
}
Collapse
B01D 47/00
Separating dispersed particles from gases, air or vapours by liquid as separating agent ( B01D 45/10 takes precedence; fractionating columns or parts thereof B01D 3/16 )
Collapse
B01D 47/02
.
by passing the gas or air or vapour over or through a liquid bath
WARNING
-
Groups B01D 47/021 to B01D 47/028 are not complete pending reclassification; see also this group

B01D 47/021
. .
{
by bubbling the gas through a liquid bath
}
B01D 47/022
. .
{
by using a liquid curtain ( B01D 47/06 takes precedence )
}
B01D 47/024
. .
{
by impinging the gas to be cleaned essentially in a perpendicular direction onto the liquid surface
}
B01D 47/025
. .
{
by contacting gas and liquid with a static flow mixer ( B01D 47/14 takes precedence )
}
B01D 47/027
. .
{
by directing the gas to be cleaned essentially tangential to the liquid surface
}
B01D 47/028
. .
{
by directing the gas through a wetted wire mesh or a perforated plate ( B01D 47/14 takes precedence )
}
B01D 47/04
.
by passing the gas or air or vapour through foam
B01D 47/05
.
by condensation of the separating agent
Collapse
B01D 47/06
.
Spray cleaning
WARNING
-
Groups B01D 47/063 and B01D 47/066 are not complete pending reclassification, see also B01D 47/06

B01D 47/063
. .
{
with two or more jets impinging against each other
}
B01D 47/066
. .
{
with nozzles using mechanical vibrations
}
Collapse
B01D 47/08
. .
with rotary nozzles
WARNING
-
Group B01D 47/085 is not complete pending reclassification, see also B01D 47/08

B01D 47/085
. . .
{
with nozzles which are partly immersed in the washing fluid
}
B01D 47/10
.
Venturi scrubbers
B01D 47/12
.
Washers with plural different washing sections ( B01D 47/14 takes precedence )
B01D 47/14
.
Packed scrubbers ( packing elements B01J 19/30 , B01J 19/32 )
Collapse
B01D 47/16
.
Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid
B01D 47/18
. .
with horizontally-arranged shafts
Collapse
B01D 49/00
Separating dispersed particles from gases, air or vapours by other methods
B01D 49/003
.
{
by sedimentation
}
B01D 49/006
.
{
by sonic or ultrasonic techniques
}
B01D 49/02
.
by thermal repulsion
Collapse
Combinations of devices for separating particles from gases or vapours
B01D 50/002
.
{
Combinations of devices relating to groups B01D 45/00 and B01D 46/00
}
B01D 50/004
.
{
Combinations of devices relating to groups B01D 45/00 and B01D 47/00
}
B01D 50/006
.
{
Combinations of devices relating to groups B01D 46/00 and B01D 47/00
}
B01D 50/008
.
{
Combinations of devices relating to groups B01D 45/00 and B01D 46/00 and B01D 47/00
}
Collapse
Auxiliary pre-treatment of gases or vapours to be cleaned ( preventing dust fires A62C; pretreatment specially adapted for magnetic or electrostatic separation B03C )
Collapse
B01D 51/02
.
Amassing the particles, e.g. by flocculation
{
( amassing by electric fields B03C 3/0175 )
}
B01D 51/04
. .
by seeding, e.g. by adding particles
Collapse
B01D 51/06
. .
by varying the pressure of the gas or vapour
B01D 51/08
. . .
by sound or ultrasonics
B01D 51/10
.
Conditioning the gas to be cleaned
Collapse
Separation of gases or vapours ; Recovering vapours of volatile solvents from gases ; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, ( recovery of volatile solvents by condensation B01D 5/00 ; sublimation B01D 7/00 ; cold traps, cold baffles B01D 8/00 ; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G 70/00 ; cleaning coal gas C10K ; working-up of natural gas, or synthetic natural gas, C10L 3/10 ; separation of difficult-to-condense gases or air by liquefaction F25J ; for investigating materials G01N 30/00 )
NOTE
-
Group B01D 53/34 takes precedence over groups B01D 53/02 to B01D 53/32

.
{
by condensation
}
B01D 53/005
.
{
by heat treatment
}
.
{
by irradiation
}
Collapse
.
by adsorption, e.g. preparative gas chromatography
{
( solid sorbent compositions B01J 20/00 , preparation of inorganic compounds or elements C01 )
}
NOTE
-
In group B01D 53/02 and subgroups it is desirable to add indexing codes relating to adsorbents, components to be removed, main components in the product gas stream or type of gas or vapour treatment chosen from groups B01D 2253/00 , B01D 2256/00 , B01D 2257/00 or B01D 2259/00

B01D 53/025
. .
{
with wetted adsorbents; Chromatography ( analytical chromatography G01N 30/00 - G01N 30/96 ; for liquids B01D 15/08 )
}
Collapse
. .
with stationary adsorbents
{
( B01D 53/025 takes precedence )
}
Collapse
. . .
{
Constructional details of adsorbing systems
}
B01D 53/0415
. . . .
{
Beds in cartridges
}
B01D 53/0423
. . . .
{
Beds in columns
}
. . . .
{
Beds with radial gas flow
}
. . . .
{
Cooling or heating systems
}
. . . .
{
Means for feeding or distributing gases
}
. . .
{
Controlling adsorption ( controlling temperature swing adsorption B01D 53/0462 , controlling pressure swing adsorption B01D 53/047 )
}
NOTE
-
In groups B01D 53/0462 and B01D 53/047 to B01D 53/0476 it is desirable to add indexing codes choosen from B01D 2259/40007 to B01D 2259/40081 relating to controlling and processing aspects of pressure or temperature swing adsorption

B01D 53/0462
. . .
{
Temperature swing adsorption
}
Collapse
. . .
Pressure swing adsorption
. . . .
{
Rapid pressure swing adsorption
}
. . . .
{
Vacuum pressure swing adsorption
}
. . . .
with storage or buffer vessel
Collapse
. .
with moving adsorbents, e.g. rotating beds
{
( B01D 53/025 takes precedence )
}
. . .
according to the "moving bed" method
Collapse
. . .
with dispersed adsorbents
. . . .
according to the "fluidised technique"
Collapse
.
by absorption
B01D 53/1406
. .
{
Multiple stage absorption
}
B01D 53/1412
. .
{
Controlling the absorption process
}
B01D 53/1418
. .
{
Recovery of products
}
B01D 53/1425
. .
{
Regeneration of liquid absorbents
}
Collapse
B01D 53/1431
. .
{
Pretreatment by other processes
}
B01D 53/1437
. . .
{
Pretreatment by adsorption
}
B01D 53/1443
. . .
{
Pretreatment by diffusion
}
B01D 53/145
. . .
{
Pretreatment by separation of solid or liquid material
}
Collapse
B01D 53/1456
. .
{
Removing acid components
}
B01D 53/1462
. . .
{
Removing mixtures of hydrogen sulfide and carbon dioxide
}
B01D 53/1468
. . .
{
Removing hydrogen sulfide
}
B01D 53/1475
. . .
{
Removing carbon dioxide
}
B01D 53/1481
. . .
{
Removing sulfur dioxide or sulfur trioxide
}
B01D 53/1487
. .
{
Removing organic compounds
}
. .
{
Selection of liquid materials for use as absorbents
}
NOTE
-
In B01D 53/1493 it is desirable to add indexing codes for compositional aspects of absorbents. The codes are chosen from B01D 2252/00 - B01D 2252/61

Collapse
. .
Absorbing units ; Liquid distributors therefor ( B01D 3/16 , B01D 3/26 , B01D 3/30 take precedence; packing elements B01J 19/30 , B01J 19/32 )
B01D 53/185
. . .
{
Liquid distributors
}
Collapse
.
by diffusion ( manufacturing semi-permeable membranes B01D 67/00 ; form, structure or properties of semi-permeable membranes B01D 69/00 ; material for semi-permeable membranes B01D 71/00 )
Collapse
B01D 2053/221
. .
{
Devices
}
B01D 2053/222
. . .
{
with plates
}
Collapse
B01D 2053/223
. . .
{
with hollow tubes
}
B01D 2053/224
. . . .
{
with hollow fibres
}
Collapse
B01D 53/225
. .
{
Multiple stage diffusion
}
B01D 53/226
. . .
{
in serial connexion
}
B01D 53/227
. . .
{
in parallel connexion
}
B01D 53/228
. .
{
characterised by specific membranes
}
B01D 53/229
. .
{
Integrated processes ( Diffusion and at least one other process, e.g. adsorption, absorption )
}
.
by centrifugal force ( centrifuges B04B ; cyclones B04C )
Collapse
.
Drying gases or vapours
. .
{
by adsorption
}
. .
{
by absorption
}
. .
{
by refrigeration (condensation)
}
B01D 53/266
. .
{
by filtration
}
. .
{
by diffusion
}
. .
Selection of materials for use as drying agents
.
Controlling by gas-analysis apparatus ( regulating non electrical variables in general G05D )
Collapse
.
by electrical effects other than those provided for in group B01D 61/00
. .
{
by electrostatic effects or by high-voltage electric fields
}
. .
{
in electrochemical cells
}
Collapse
.
Chemical or biological purification of waste gases
. .
{
Heat recovery
}
. .
{
Controlling the process
}
Collapse
. .
Removing components of undefined structure
. . .
Acidic components ( B01D 53/44 takes precedence )
. . .
Basic components ( B01D 53/44 takes precedence )
. . .
Organic components
Collapse
. .
Removing components of defined structure
Collapse
. . .
Sulfur compounds
. . . .
{
containing only one sulfur compound other than sulfur oxides or hydrogen sulfide
}
Collapse
. . . .
Sulfur oxides ( B01D 53/60 takes precedence )
Collapse
. . . . .
{
by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
}
. . . . . .
{
characterised by a specific solution or suspension
}
. . . . . .
{
characterised by a specific device
}
. . . . . .
{
in a spray drying process
}
. . . . .
{
by treating the gases with other liquids
}
. . . . .
{
by treating the gases with solids
}
Collapse
. . . .
Hydrogen sulfide
. . . . .
{
Mixtures of hydrogen sulfide and sulfur oxides
}
. . . . .
{
Mixtures of hydrogen sulfide and carbon dioxide
}
Collapse
. . .
Nitrogen compounds
Collapse
. . . .
Nitrogen oxides ( B01D 53/60 takes precedence )
. . . . .
{
by treating the gases with solids
}
. . . .
Ammonia
. . .
Simultaneously removing sulfur oxides and nitrogen oxides
. . .
Carbon oxides
. . .
Heavy metals or compounds thereof, e.g. mercury
. . .
Ozone
Collapse
. . .
Halogens or halogen compounds
. . . .
{
by treating the gases with solids
}
. . . .
Organic halogen compounds
. . .
Organic compounds not provided for in groups B01D 53/48 to B01D 53/70 , e.g. hydrocarbons
. .
After-treatment of removed components
Collapse
. .
General processes for purification of waste gases ; Apparatus or devices specially adapted therefor ( B01D 53/92 takes precedence )
. . .
Multi-step processes
B01D 53/76
. . .
Gas phase processes, e.g. by using aerosols
Collapse
. . .
Liquid phase processes
. . . .
with gas-liquid contact
. . . .
Injecting reactants
. . .
Semi-solid phase processes, i.e. by using slurries
Collapse
. . .
Solid phase processes
. . . .
with stationary reactants
. . . .
with moving reactants
Collapse
. . .
Biological processes
. . . .
with gas-solid contact
Collapse
. . .
Catalytic processes
Collapse
B01D 53/8603
. . . .
{
Removing sulfur compounds
}
B01D 53/8606
. . . . .
{
only one sulfur compound other than sulfur oxides or hydrogen sulfide
}
. . . . .
{
Sulfur oxides
}
Collapse
. . . . .
{
Hydrogen sulfide
}
. . . . . .
{
Mixtures of hydrogen sulfide and sulfur oxides
}
. . . . . .
{
Mixtures of hydrogen sulfide and carbon dioxides
}
Collapse
B01D 53/8621
. . . .
{
Removing nitrogen compounds
}
Collapse
. . . . .
{
Nitrogen oxides
}
. . . . . .
{
Processes characterised by a specific catalyst
}
B01D 53/8631
. . . . . .
{
Processes characterised by a specific device
}
. . . . .
{
Ammonia
}
B01D 53/8637
. . . .
{
Simultaneously removing sulfur oxides and nitrogen oxides
}
B01D 53/864
. . . .
{
Removing carbon monoxide or hydrocarbons
}
Collapse
B01D 53/8643
. . . .
{
Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
}
Collapse
. . . . .
{
Simultaneous elimination of the components ( B01D 53/8656 takes precedence )
}
. . . . . .
{
characterised by a specific catalyst
}
. . . . . .
{
characterised by a specific device
}
. . . . .
{
Successive elimination of the components
}
Collapse
. . . .
{
Removing halogens or halogen compounds
}
. . . . .
{
Organic halogen compounds
}
. . . .
{
Removing heavy metals or compounds thereof, e.g. mercury
}
. . . .
{
Removing organic compounds not provided for in B01D 53/8603 to B01D 53/8665
}
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. . . .
{
Removing components of defined structure not provided for in B01D 53/8603 to B01D 53/8668
}
B01D 53/8675
. . . . .
{
Ozone
}
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. . . .
{
Removing components of undefined structure
}
B01D 53/8681
. . . . .
{
Acidic components ( B01D 53/8687 takes precedence )
}
B01D 53/8684
. . . . .
{
Basic components ( B01D 53/8687 takes precedence )
}
B01D 53/8687
. . . . .
{
Organic components
}
. . . .
{
Multiple step processes
}
. . . .
{
After-treatment of removed components
}
. . . .
{
Controlling the catalytic process
}
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. . . .
Handling or mounting catalysts
. . . . .
{
Devices in general for catalytic purification of waste gases
}
. . . .
Injecting reactants
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. .
of engine exhaust gases ( exhaust
{
or silencing
}
apparatus
{
for internal combustion engines, machines or engines in general
}
, having means for purifying,
{
rendering innocuous
}
or otherwise treating exhaust gases F01N 3/00 )
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B01D 53/922
. . .
{
Mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
}
B01D 53/925
. . . .
{
Simultaneous elimination of carbon monoxide or hydrocarbons and nitrogen oxides
}
B01D 53/927
. . . .
{
Successive elimination of carbon monoxide or hydrocarbons and nitrogen oxides
}
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. . .
by catalytic processes
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B01D 53/9404
. . . .
{
Removing only nitrogen compounds
}
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. . . . .
{
Nitrogen oxides
}
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. . . . . .
{
Processes characterised by a specific catalyst
}
WARNING
-
Groups B01D 53/9418 to B01D 53/9427 are not complete pending a reorganisation. See also B01D 53/9413

. . . . . . .
{
for removing nitrogen oxides by selective catalytic reduction (SCR) using a reducing agent in a lean exhaust gas
}
. . . . . . .
{
for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases ( LNT, NSC, NSR )
}
. . . . . . .
{
for removing nitrous oxide
}
. . . . . .
{
Processes characterised by a specific device
}
B01D 53/9436
. . . . .
{
Ammonia
}
. . . .
{
Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts ( three-way-catalysts (TWC) B01D 53/9445 )
}
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. . . .
{
Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts (TWC) or four-way-catalysts (FWC)
}
WARNING
-
Groups B01D 53/945 and B01D 53/9454 are not complete pending a reorganisation. See also B01D 53/9445

. . . . .
{
characterised by a specific catalyst
}
. . . . .
{
characterised by a specific device
}
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. . . .
{
Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts ( layered catalysts with only one function B01D 53/9413 , B01D 53/944 or B01D 53/945 )
}
WARNING
-
Groups B01D 53/9459 to B01D 53/9477 are not complete pending a reorganisation. See also B01D 53/9459

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. . . . .
{
with catalysts positioned on one brick
}
. . . . . .
{
in different layers
}
. . . . . .
{
in different zones
}
. . . . .
{
with catalysts positioned on separate bricks, e.g. exhaust systems
}
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B01D&n