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Color Curly Brackets (indicating CPC extensions to IPC)
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CPC
COOPERATIVE PATENT CLASSIFICATION
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C01B
NON-METALLIC ELEMENTS ; COMPOUNDS THEREOF;
{
METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
}
NOTE
-
In this subclass, tradenames that are often found in scientific and patent literature have been used in order to define precisely the scope of the groups.

Attention is drawn to the definitions of groups of chemical elements following the title of section C.

WARNING
-

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

C01B31/16 covered by B01J 39/24 , B01J 41/18
C01B35/16 , C01B35/18 covered by C01B 35/00 + s.gr.

General concordance IPC4 or IPC5 to IPC6 groups is as follows:
C01B 25/37 (partly) : C01B 37/002
C01B 25/453 : C01B 37/00 , C01B 39/54
C01B 33/185 : C01B 37/02
C01B 33/28 and subgroups : C01B 37/00 , C01B 39/00
C01B 35/1009 : C01B 37/06 , C01B 39/12 , C01B 39/54


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Guide Heading:
Hydrogen ; Hydrides ; Water ; Synthesis gas from hydrocarbons
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C01B 3/00
Hydrogen ; Gaseous mixtures containing hydrogen ; Separation of hydrogen from mixtures containing it ( separation of gases by physical means B01D ) ; Purification of hydrogen ( production of water gas or synthesis gas from solid carbonaceous material C10J; purifying or modifying the chemical compositions of combustible technical gases containing carbon monoxide C10K )
NOTE
-
1. In this group it is desirable to add the indexing codes of groups B01J 2208/00 and B01J 2219/00 , for details relating to the reactors used in the generation of hydrogen or synthesis gas. 2. In groups C01B 3/12 to C01B 3/18 and in groups C01B 3/22 to C01B 3/586 it is desirable to add the indexing codes of group C01B 2203/00 , for aspects relating to hydrogen or synthesis gas generation processes.

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C01B 3/0005
.
{
Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ( purification of hydrogen C01B 3/508 ) ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
}
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C01B 3/001
. .
{
characterised by the uptaking medium; Treatment thereof
}
C01B 3/0015
. . .
{
Organic compounds; Solutions thereof
}
C01B 3/0021
. . .
{
Carbon, e.g. active carbon, carbon nanotubes, fullerenes; Treatment thereof
}
C01B 3/0026
. . .
{
of one single metal or a rare earth metal; Treatment thereof
}
NOTE
-
In all of the groups C01B 3/0026 to C01B 3/0084 , the metallic storage materials may contain minor quantities of non-metals such as B, C, O, S, Se, Si; e.g. C01B 3/0036 "only containing iron and titanium" includes Fe-Ti compositions comprising non-metals

In the groups C01B 3/0026 and C01B 3/0047 to C01B 3/0068 a "rare-earth metal" means one single metal or a combination of metals selected from the lanthanides, Sc or Y

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C01B 3/0031
. . .
{
Intermetallic compounds; Metal alloys; Treatment thereof
}
C01B 3/0036
. . . .
{
only containing iron and titanium; Treatment thereof
}
C01B 3/0042
. . . .
{
only containing magnesium and nickel; Treatment thereof
}
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C01B 3/0047
. . . .
{
containing a rare earth metal; Treatment thereof
}
C01B 3/0052
. . . . .
{
also containing titanium
}
C01B 3/0057
. . . . .
{
also containing nickel
}
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C01B 3/0063
. . . . .
{
only containing a rare earth metal and only one other metal
}
C01B 3/0068
. . . . . .
{
the other metal being nickel
}
C01B 3/0073
. . .
{
Slurries, Suspensions
}
C01B 3/0078
. . .
{
Composite solid storage mediums, i.e. coherent or loose mixtures of different solid constituents, chemically or structurally heterogeneous solid masses, coated solids or solids having a chemically modified surface region
}
C01B 3/0084
. . .
{
Solid storage mediums characterised by their shape, e.g. pellets, sintered shaped bodies, sheets, porous compacts, spongy metals, hollow particles, solids with cavities, layered solids
}
C01B 3/0089
.
{
Ortho-para conversion
}
C01B 3/0094
.
{
Atomic hydrogen
}
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C01B 3/02
.
Production of hydrogen or of gaseous mixtures containing
{
a substantial proportion of
}
 hydrogen
C01B 3/025
. .
{
Preparation or purification of gas mixtures for ammonia synthesis
}
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C01B 3/04
. .
by decomposition of inorganic compounds, e.g. ammonia
{
( C01B 3/0005 takes precedence )
}
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C01B 3/042
. . .
{
Decomposition of water
}
C01B 3/045
. . . .
{
in gaseous phase
}
C01B 3/047
. . .
{
Decomposition of ammonia
}
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C01B 3/06
. .
by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents ( by electrolysis of water C25B 1/04 )
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C01B 3/061
. . .
{
by reaction of metal oxides with water
}
C01B 3/063
. . . .
{
Cyclic methods
}
C01B 3/065
. . .
{
from a hydride
}
C01B 3/066
. . .
{
by reaction of water with phosphorus
}
C01B 3/068
. . .
{
the hydrogen being generated from the water as a result of a cyclus of reactions, not covered by groups C01B 3/063 or C01B 3/105
}
C01B 3/08
. . .
with metals
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C01B 3/10
. . .
by reaction of water vapour with metals
C01B 3/105
. . . .
{
Cyclic methods
}
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C01B 3/12
. . .
by reaction of water vapour with carbon monoxide
C01B 3/14
. . . .
Handling of heat and steam
C01B 3/16
. . . .
using catalysts
C01B 3/18
. . . .
using moving solid particles
C01B 3/20
. . .
by reaction of metal hydroxides with carbon monoxide
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C01B 3/22
. .
by decomposition of gaseous or liquid organic compounds (
{
C01B 3/0005 takes precedence
}
 ; coking liquid carbonaceous materials C10B 55/00 )
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C01B 3/24
. . .
of hydrocarbons
C01B 3/26
. . . .
using catalysts
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C01B 3/28
. . . .
using moving solid particles
C01B 3/30
. . . . .
using the fluidised bed technique
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C01B 3/32
. .
by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
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C01B 3/323
. . .
{
Catalytic reaction of gaseous or liquid organic compounds other than hydrocarbons with gasifying agents
}
C01B 3/326
. . . .
{
characterised by the catalyst
}
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C01B 3/34
. . .
by reaction of hydrocarbons with gasifying agents
C01B 3/342
. . . .
{
with the aid of electrical means, electromagnetic or mechanical vibrations, or particle radiations
}
C01B 3/344
. . . .
{
using non-catalytic solid particles
}
C01B 3/346
. . . .
{
using heat generated by superheated steam
}
C01B 3/348
. . . .
{
by direct contact with heat accumulating liquids, e.g. molten metals, molten salts
}
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C01B 3/36
. . . .
using oxygen or mixtures containing oxygen as gasifying agents
C01B 3/363
. . . . .
{
characterised by the burner used
}
C01B 3/366
. . . . .
{
Partial combustion in internal-combustion engines
}
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C01B 3/38
. . . .
using catalysts
C01B 3/382
. . . . .
{
Multi-step processes
}
C01B 3/384
. . . . .
{
the catalyst being continuously externally heated
}
C01B 3/386
. . . . .
{
Catalytic partial combustion
}
C01B 3/388
. . . . .
{
the heat being generated by superheated steam
}
C01B 3/40
. . . . .
characterised by the catalyst
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C01B 3/42
. . . . .
using moving solid particles
C01B 3/44
. . . . . .
using the fluidised bed technique
C01B 3/46
. . . .
using discontinuously preheated non-moving solid materials, e.g. blast and run
C01B 3/48
. . . .
followed by reaction of water vapour with carbon monoxide
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C01B 3/50
.
Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification ( C01B 3/14 takes precedence )
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C01B 3/501
. .
{
by diffusion
}
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C01B 3/503
. . .
{
characterised by the membrane
}
C01B 3/505
. . . .
{
Membranes containing palladium
}
C01B 3/506
. .
{
at low temperatures
}
C01B 3/508
. .
{
by selective and reversible uptake by an appropriate medium, i.e. the uptake being based on physical or chemical sorption phenomena or on reversible chemical reactions ( the appropriate mediums per se C01B 3/0005 )
}
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C01B 3/52
. .
by contacting with liquids ; Regeneration of used liquids
{
( C01B 3/508 takes precedence )
}
C01B 3/54
. . .
including a catalytic reaction
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C01B 3/56
. .
by contacting with solids ; Regeneration of used solids
{
( C01B 3/508 takes precedence )
}
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C01B 3/58
. . .
including a catalytic reaction
C01B 3/583
. . . .
{
the reaction being the selective oxidation of carbon monoxide
}
C01B 3/586
. . . .
{
the reaction being a methanation reaction
}
C01B 4/00
Hydrogen isotopes ; Inorganic compounds thereof prepared by isotope exchange, e.g. NH3 + D2 ---> NH2D + HD ( separation of isotopes B01D 59/00 ; other chemical reactions to form compounds of hydrogen isotopes, see the relevant groups for hydrogen compounds in class C01 )
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C01B 5/00
Water
C01B 5/02
.
Heavy water ; Preparation by chemical reaction of hydrogen isotopes or their compounds, e.g. 4ND3 + 7O2 ---> 4NO2 + 6D2O, 2D2 + O2 ---> 2D2O
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C01B 6/00
Hydrides of metals
{
including fully or partially hydrided metals, alloys or intermetallic compounds ( use of some thereof for reversible sorption of hydrogen C01B 3/0005 , C01B 3/508 ) ; Compounds containing at least one metal-hydrogen bond, e.g. (GeH3)2S, SiH GeH
}
 ; Monoborane or diborane ; Addition complexes thereof ( higher hydrides of boron, substituted hydrides of boron C01B 35/00 )
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C01B 6/003
.
{
Hydrides containing only one metal and one or several non-metals
}
C01B 6/006
. .
{
only one metal and one or several halogens
}
C01B 6/02
.
Hydrides of transition elements ; Addition complexes thereof
C01B 6/04
.
Hydrides of alkali metals, alkaline earth metals, beryllium or magnesium ; Addition complexes thereof
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C01B 6/06
.
Hydrides of aluminium, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, bismuth or polonium ; Monoborane ; Diborane ; Addition complexes thereof
C01B 6/065
. .
{
Hydrides of arsenic or antimony
}
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C01B 6/10
. .
Monoborane ; Diborane ; Addition complexes thereof
C01B 6/11
. . .
Preparation from boron or inorganic compounds containing boron and oxygen
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C01B 6/13
. . .
Addition complexes of monoborane or diborane, e.g. with phosphine, arsine or hydrazine
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C01B 6/15
. . . .
Metal borohydrides ; Addition complexes thereof
C01B 6/17
. . . . .
Preparation from boron or inorganic compounds containing boron and oxygen
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C01B 6/19
. . . . .
Preparation from other compounds of boron
C01B 6/21
. . . . . .
Preparation of borohydrides of alkali metals, alkaline earth metals, magnesium or beryllium ; Addition complexes thereof, e.g. LiBH4.2N2H4, NaB2H7
C01B 6/23
. . . . . .
Preparation of borohydrides of other metals, e.g. aluminium borohydride ; Addition complexes thereof, e.g. Li[Al(BH4)3H]
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C01B 6/24
.
Hydrides containing at least two metals ; Addition complexes thereof ( C01B 6/13 to C01B 6/23 take precedence )
C01B 6/243
. .
{
containing only hydrogen, aluminium and alkali metals, e.g. Li(AlH4)
}
C01B 6/246
. .
{
also containing non-metals other than hydrogen
}
C01B 6/26
. .
Preparation from the metal with the highest valency or from its oxides or salts of its oxyacids
C01B 6/34
.
Purification ; Stabilisation
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Guide Heading:
Halogens, compounds thereof
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C01B 7/00
Halogens ; Halogen acids ( oxyacids C01B 11/00 )
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C01B 7/01
.
Chlorine ; Hydrogen chloride
C01B 7/012
. .
{
Preparation of hydrogen chloride from the elements
}
C01B 7/015
. .
{
Chlorine hydrates; Obtaining chlorine therefrom
}
C01B 7/017
. .
{
Preparation of hydrogen chloride by reacting together chlorine, water and carbon or carbon monoxide ( the carbon not acting only as catalyst )
}
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C01B 7/03
. .
Preparation from chlorides
C01B 7/035
. . .
{
Preparation of hydrogen chloride from chlorides
}
C01B 7/04
. . .
Preparation of chlorine from hydrogen chloride
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C01B 7/05
. . .
Preparation from ammonium chloride
C01B 7/055
. . . .
{
Preparation of hydrogen chloride from ammonium chloride
}
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C01B 7/07
. .
Purification;
{
Separation ( C01B 7/015 takes precedence )
}
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C01B 7/0706
. . .
{
of hydrogen chloride
}
C01B 7/0712
. . . .
{
by distillation
}
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C01B 7/0718
. . . .
{
by adsorption
}
C01B 7/0725
. . . . .
{
by active carbon
}
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C01B 7/0731
. . . .
{
by extraction
}
C01B 7/0737
. . . . .
{
hydrogen chloride being extracted
}
C01B 7/0743
. . .
{
of gaseous or dissolved chlorine
}
C01B 7/075
. . .
of liquid chlorine
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C01B 7/09
.
Bromine ; Hydrogen bromide
C01B 7/093
. .
{
Hydrogen bromide
}
C01B 7/096
. .
{
Bromine
}
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C01B 7/13
.
Iodine ; Hydrogen iodide
C01B 7/135
. .
{
Hydrogen iodide
}
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C01B 7/14
. .
Iodine
C01B 7/16
. . .
Preparation from seaweed
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C01B 7/19
.
Fluorine ; Hydrogen fluoride
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C01B 7/191
. .
{
Hydrogen fluoride
}
C01B 7/192
. . .
{
Preparation from fluorspar
}
C01B 7/193
. . .
{
Preparation from silicon tetrafluoride, fluosilicic acid or fluosilicates
}
C01B 7/194
. . .
{
Preparation from ammonium fluoride
}
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C01B 7/195
. . .
{
Separation; Purification
}
C01B 7/196
. . . .
{
by distillation
}
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C01B 7/197
. . . .
{
by adsorption
}
C01B 7/198
. . . . .
{
by solid ion-exchangers
}
C01B 7/20
. .
Fluorine
C01B 7/24
.
Inter-halogen compounds
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C01B 9/00
General methods of preparing halides ( particular individual halides, see the relevant groups in C01B to C01G according to the element combined with the halogen; electrolytic production of inorganic compounds C25B )
C01B 9/02
.
Chlorides
C01B 9/04
.
Bromides
C01B 9/06
.
Iodides
C01B 9/08
.
Fluorides
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C01B 11/00
Oxides or oxyacids of halogens ; Salts thereof
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C01B 11/02
.
Oxides of chlorine
C01B 11/021
. .
{
Chlorine hemioxide (Cl2O)
}
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C01B 11/022
. .
{
Chlorine dioxide (ClO2)
}
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C01B 11/023
. . .
{
Preparation from chlorites or chlorates
}
C01B 11/024
. . . .
{
from chlorites
}
C01B 11/025
. . . .
{
from chlorates without any other reaction reducing agent than chloride ions
}
C01B 11/026
. . . .
{
from chlorate ions in the presence of a peroxidic compound, e.g. hydrogen peroxide, ozone, peroxysulfates
}
C01B 11/027
. . . .
{
from chlorate ions in the presence of a nitrogen compound selected from nitrogen dioxide, nitrate or nitrite ions, nitrosylchloride, hydrazine or hydrazine compounds
}
C01B 11/028
. . .
{
Separation; Purification
}
C01B 11/029
. .
{
Chlorine trioxide (ClO3); Chlorine hexoxide (Cl2O6); Chlorine heptoxide (Cl2O7)
}
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C01B 11/04
.
Hypochlorous acid
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C01B 11/06
. .
Hypochlorites
C01B 11/062
. . .
{
Hypochlorites of alkali metals
}
C01B 11/064
. . .
{
Hypochlorites of alkaline-earth metals
}
C01B 11/066
. . .
{
Magnesium hypochlorite
}
C01B 11/068
. . .
{
Stabilisation by additives other than oxides, hydroxides, carbonates of alkali or alkaline-earth metals; Coating of particles; Shaping; Granulation
}
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C01B 11/08
.
Chlorous acid
C01B 11/10
. .
Chlorites
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C01B 11/12
.
Chloric acid
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C01B 11/14
. .
Chlorates
C01B 11/145
. . .
{
Separation; Crystallisation; Purification, After-treatment; Stabilisation by additives
}
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C01B 11/16
.
Perchloric acid
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C01B 11/18
. .
Perchlorates
C01B 11/185
. . .
{
Ammonium perchlorate
}
C01B 11/20
.
Oxygen compounds of bromine
C01B 11/22
.
Oxygen compounds of iodine
C01B 11/24
.
Oxygen compounds of fluorine
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Guide Heading:
Oxygen ; Oxides or hydroxides in general ; Per-compounds
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C01B 13/00
Oxygen ; Ozone ; Oxides or hydroxides in general
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C01B 13/02
.
Preparation of oxygen (
{
enrichment of a gaseous mixture, in particular air, in oxygen or separation of oxygen from a gaseous mixture by an adsorption process B01D63/03
}
 ; by liquefying F25J )
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C01B 13/0203
. .
{
from inorganic compounds
}
C01B 13/0207
. . .
{
Water
}
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C01B 13/0211
. . .
{
Peroxy compounds
}
C01B 13/0214
. . . .
{
Hydrogen peroxide
}
C01B 13/0218
. . .
{
Chlorate
}
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C01B 13/0222
. .
{
from organic compounds
}
C01B 13/0225
. . .
{
Peroxy compounds
}
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C01B 13/0229
. .
{
Purification or separation processes
}
NOTE
-
In groups C01B 13/0229 to C01B 13/0288 , additional features relating to the purification or separation processes are indexed with codes chosen from C01B 2210/0026 to M210/00W90.

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C01B 13/0233
. . .
{
Chemical processing only
}
C01B 13/0237
. . . .
{
by oxidation
}
C01B 13/024
. . . .
{
by reduction
}
C01B 13/0244
. . . .
{
by complexation
}
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C01B 13/0248
. . .
{
Physical processing only
}
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C01B 13/0251
. . . .
{
by making use of membranes
}
C01B 13/0255
. . . . .
{
characterised by the type of membrane
}
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C01B 13/0259
. . . .
{
by adsorption on solids
}
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C01B 13/0262
. . . . .
{
characterised by the adsorbent
}
C01B 13/0266
. . . . . .
{
Carbon based materials
}
C01B 13/027
. . . . . .
{
Zeolites
}
C01B 13/0274
. . . . . .
{
Other molecular sieve materials
}
C01B 13/0277
. . . . .
{
Temperature swing adsorption
}
C01B 13/0281
. . . . .
{
in getters
}
C01B 13/0285
. . . .
{
by absorption in liquids
}
C01B 13/0288
. . .
{
Combined chemical and physical processing
}
NOTE
-
In this group, processing steps are indexed with codes chosen from C01B 2210/0001 to C01B 2210/0025

C01B 13/0292
. .
{
Preparation from air using a molten phase containing alkali metal nitrite, optionally together with other oxygen acceptors
}
C01B 13/0296
. .
{
Generators releasing in a self-sustaining way pure oxygen from a solid charge, without interaction of it with a fluid nor external heating, e.g. chlorate candles or canisters containing them ( charges per se C01B 13/02 )
}
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C01B 13/08
. .
from air with the aid of metal oxides, e.g. barium oxide, manganese oxide
{
( C01B 13/0292 takes precedence )
}
C01B 13/083
. . .
{
with barium oxide
}
C01B 13/086
. . .
{
with manganese oxide
}
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C01B 13/10
.
Preparation of ozone
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C01B 13/11
. .
by electric discharge
NOTE
-
In groups C01B 13/11 and C01B 13/11 B, additional features relating to the preparation of ozone by electrical discharge are indexed with codes chosen from C01B 2201/00 to C01B 2201/90 .

C01B 13/115
. . .
{
characterised by the electrical circuits producing the electrical discharge
}
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C01B 13/14
.
Methods for preparing oxides or hydroxides in general ( particular individual oxides or hydroxides, see the relevant groups of subclasses C01B to C01G or C25B, according to the element combined with the oxygen or hydroxy group )
C01B 13/145
. .
{
After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity
}
C01B 13/16
. .
Purification
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C01B 13/18
. .
by thermal decomposition of compounds, e.g. of salts or hydroxides
C01B 13/185
. . .
{
Preparing mixtures of oxides
}
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C01B 13/20
. .
by oxidation of elements in the gaseous state ; by oxidation or hydrolysis of compounds in the gaseous state
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C01B 13/22
. . .
of halides or oxyhalides
C01B 13/24
. . . .
in the presence of hot combustion gases
C01B 13/26
. . . .
in the presence of a fluidised bed
C01B 13/28
. . . .
using a plasma or an electric discharge
C01B 13/30
. . . .
Removal and cooling of the oxide-containing suspension
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C01B 13/32
. .
by oxidation or hydrolysis of elements or compounds in the liquid or solid state
{
or in non-aqueous solution, e.g. sol-gel process
}
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C01B 13/322
. . .
{
of elements or compounds in the solid state
}
C01B 13/324
. . . .
{
by solid combustion synthesis
}
C01B 13/326
. . .
{
of elements or compounds in the liquid state
}
C01B 13/328
. . .
{
by processes making use of emulsions, e.g. the kerosine process
}
C01B 13/34
. .
by oxidation or hydrolysis of sprayed or atomised solutions
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C01B 13/36
. .
by precipitation reactions in
{
aqueous
}
 solutions
{
( C01B 13/328 takes precedence )
}
C01B 13/363
. . .
{
Mixtures of oxides or hydroxides by precipitation
}
C01B 13/366
. . .
{
by hydrothermal processing
}
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C01B 15/00
Peroxides ; Peroxyhydrates ; Peroxyacids or salts thereof ; Superoxides ; Ozonides
C01B 15/005
.
{
Stabilisation of the solid compounds subsequent to the preparation or to the crystallisation, by additives or by coating
}
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C01B 15/01
.
Hydrogen peroxide
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C01B 15/013
. .
Separation ; Purification ; Concentration
C01B 15/0135
. . .
{
Purification by solid ion-exchangers or solid chelating agents
}
C01B 15/017
. . .
Anhydrous hydrogen peroxide ; Anhydrous solutions or gaseous mixtures containing hydrogen peroxide
Collapse
C01B 15/022
. .
Preparation from organic compounds
C01B 15/023
. . .
by the alkyl-anthraquinone process
C01B 15/024
. . .
from hydrocarbons
C01B 15/026
. . .
from alcohols
Collapse
C01B 15/027
. .
Preparation from water
C01B 15/0275
. . .
{
Preparation by reaction of water, carbon monoxide and oxygen
}
Collapse
C01B 15/029
. .
Preparation from hydrogen and oxygen
C01B 15/0295
. . .
{
by electrical discharge
}
Collapse
C01B 15/03
. .
Preparation from inorganic peroxy compounds, e.g. from peroxysulfate
C01B 15/032
. . .
from metal peroxides
C01B 15/037
. .
Stabilisation by additives
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C01B 15/04
.
Metal peroxides or peroxyhydrates thereof;
{
Metal
}
 superoxides;
{
Metal
}
 ozonides;
{
Peroxyhydrates thereof
}
Collapse
C01B 15/043
. .
of alkali metals, alkaline earth metals or magnesium
{
or beryllium or aluminium
}
C01B 15/0435
. . .
{
of alkali metals
}
Collapse
C01B 15/047
. .
of heavy metals
C01B 15/0475
. . .
{
of actinides
}
Collapse
C01B 15/055
.
Peroxyhydrates ( C01B 15/04 takes precedence ) ; Peroxyacids or salts thereof
Collapse
C01B 15/06
. .
containing sulfur
Collapse
C01B 15/08
. . .
Peroxysulfates
C01B 15/085
. . . .
{
Stabilisation of the solid compounds, subsequent to the preparation or to the crystallisation, by additives or by coating
}
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C01B 15/10
. .
containing carbon
C01B 15/103
. . .
{
containing only alkali metals as metals
}
C01B 15/106
. . .
{
Stabilisation of the solid compounds, subsequent to the preparation or to the crystallisation, by additives or by coating
}
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C01B 15/12
. .
containing boron
C01B 15/123
. . .
{
Stabilisation of the solid compounds, subsequent to the preparation or to the crystallisation, by additives or by coating
}
C01B 15/126
. . .
{
Dehydration of solid hydrated peroxyborates to less hydrated or anhydrous products
}
C01B 15/14
. .
containing silicon
C01B 15/16
. .
containing phosphorus
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C01B 17/00
Sulfur ; Compounds thereof
Collapse
C01B 17/02
.
Preparation of sulfur ; Purification
C01B 17/0205
. .
{
Separation of sulfur from liquids, e.g. by coalescence
}
C01B 17/021
. .
{
Separation of sulfur from gases
}
C01B 17/0216
. .
{
Solidification or cooling of liquid sulfur
}
C01B 17/0221
. .
{
Melting
}
C01B 17/0226
. .
{
Vaporising or superheating
}
C01B 17/0232
. .
{
Purification, e.g. degassing
}
C01B 17/0237
. .
{
Converting into particles, e.g. by granulation, milling
}
Collapse
C01B 17/0243
. .
{
Other after-treatment of sulfur
}
C01B 17/0248
. . .
{
of particulate sulfur
}
Collapse
C01B 17/0253
. .
{
from non-gaseous sulfur compounds other than sulfides or materials containing such sulfides
}
Collapse
C01B 17/0259
. . .
{
by reduction of sulfates
}
C01B 17/0264
. . . .
{
of calcium sulfates
}
Collapse
C01B 17/027
. .
Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses
{
or sulfur containing ores
}
 ; Purification
{
of the recovered sulfur
}
C01B 17/033
. . .
using a liquid extractant
Collapse
C01B 17/04
. .
from gaseous sulfur compounds including gaseous sulfides
Collapse
C01B 17/0404
. . .
{
by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
}
C01B 17/0408
. . . .
{
Pretreatment of the hydrogen sulfide containing gases
}
Collapse
C01B 17/0413
. . . .
{
characterised by the combustion step
}
C01B 17/0417
. . . . .
{
Combustion reactors
}
C01B 17/0421
. . . . .
{
Multistage combustion
}
Collapse
C01B 17/0426
. . . .
{
characterised by the catalytic conversion
}
C01B 17/043
. . . . .
{
Catalytic converters
}
C01B 17/0434
. . . . .
{
Catalyst compositions
}
C01B 17/0439
. . . . .
{
at least one catalyst bed operating below the dew-point of sulfur
}
C01B 17/0443
. . . . .
{
in a moving bed
}
C01B 17/0447
. . . .
{
Separation of the obtained sulfur
}
C01B 17/0452
. . . .
{
Process control; Start-up or cooling-down procedures of the Claus process
}
C01B 17/0456
. . . .
{
the hydrogen sulfide-containing gas being a Claus process tail gas
}
Collapse
C01B 17/046
. . . .
{
without intermediate formation of sulfur dioxide
}
C01B 17/0465
. . . . .
{
Catalyst compositions
}
C01B 17/0469
. . . . .
{
at least one catalyst bed operating below the dew-point of sulfur
}
Collapse
C01B 17/0473
. . .
{
by reaction of sulfur dioxide or sulfur trioxide containing gases with reducing agents other than hydrogen sulfide
}
C01B 17/0478
. . . .
{
with hydrocarbons or mixtures containing them
}
C01B 17/0482
. . . .
{
with carbon or solid carbonaceous materials
}
C01B 17/0486
. . . .
{
with carbon monoxide or carbon monoxide containing mixtures
}
C01B 17/0491
. . . .
{
with hydrogen or hydrogen-containing mixtures, e.g. synthesis gas
}
C01B 17/0495
. . .
{
by dissociation of hydrogen sulfide into the elements
}
C01B 17/05
. . .
by wet processes
C01B 17/06
. .
from non-gaseous sulfides or materials containing such sulfides, e.g. ores
C01B 17/10
. .
Finely divided sulfur, e.g. sublimed sulfur, flowers of sulfur
Collapse
C01B 17/12
. .
Insoluble sulfur (mu-sulfur)
C01B 17/125
. . .
{
Sulfur isotopes other than 32S
}
Collapse
C01B 17/16
.
Hydrogen sulfides
Collapse
C01B 17/161
. .
{
Preparation from elemental sulfur
}
C01B 17/162
. . .
{
from elemental sulfur and hydrogen
}
C01B 17/164
. .
{
Preparation by reduction of oxidic sulfur compounds
}
C01B 17/165
. .
{
Preparation from sulfides, oxysulfides or polysulfides
}
C01B 17/167
. .
{
Separation
}
C01B 17/168
. .
{
Purification
}
C01B 17/18
. .
Hydrogen polysulfides
C01B 17/20
.
Methods for preparing sulfides or polysulfides, in general ( ammonium sulfides or polysulfides C01C ; sulfides or polysulfides of metals, other than alkali metals, magnesium, calcium, strontium and barium, see the relevant groups of subclasses C01F or C01G , according to the metal )
Collapse
C01B 17/22
.
Alkali metal sulfides or polysulfides
Collapse
C01B 17/24
. .
Preparation by reduction
C01B 17/26
. . .
with carbon
C01B 17/28
. . .
with reducing gases
C01B 17/30
. .
Preparation from sodium or potassium amalgam with sulfur or sulfides
C01B 17/32
. .
Hydrosulfides of sodium or potassium
C01B 17/34
. .
Polysulfides of sodium or potassium
C01B 17/36
. .
Purification
C01B 17/38
. .
Dehydration
C01B 17/40
. .
Making shaped products, e.g. granules
Collapse
C01B 17/42
.
Sulfides or polysulfides of magnesium, calcium, strontium, or barium
C01B 17/43
. .
from oxides or hydroxides with sulfur or hydrogen sulfide
C01B 17/44
. .
by reduction of sulfates
Collapse
C01B 17/45
.
Compounds containing sulfur and halogen, with or without oxygen
Collapse
C01B 17/4507
. .
{
containing sulfur and halogen only
}
Collapse
C01B 17/4515
. . .
{
containing sulfur and fluorine only
}
C01B 17/4523
. . . .
{
Sulfur tetrafluoride
}
C01B 17/453
. . . .
{
Sulfur hexafluoride
}
Collapse
C01B 17/4538
. . .
{
containing sulfur and chlorine only
}
C01B 17/4546
. . . .
{
Sulfur dichloride
}
C01B 17/4553
. . . .
{
Sulfur hexachloride
}
Collapse
C01B 17/4561
. .
{
Compounds containing sulfur, halogen and oxygen only
}
C01B 17/4569
. . .
{
Thionyl fluoride (SOF2)
}
C01B 17/4576
. . .
{
Sulfuryl fluoride (SO2F2)
}
C01B 17/4584
. . .
{
Thionyl chloride (SOCl2)
}
C01B 17/4592
. . .
{
Sulfuryl chloride (SO2Cl2)
}
Collapse
C01B 17/46
.
Compounds containing sulfur, halogen, hydrogen, and oxygen
C01B 17/463
. .
{
Fluorosulfonic acid (FSO3H)
}
C01B 17/466
. .
{
Chlorosulfonic acid (ClSO3H)
}
Collapse
C01B 17/48
.
Sulfur dioxide ; Sulfurous acid
Collapse
C01B 17/50
. .
Preparation of sulfur dioxide
Collapse
C01B 17/501
. . .
{
by reduction of sulfur compounds
}
C01B 17/502
. . . .
{
of sulfur trioxide
}
C01B 17/503
. . . .
{
of sulfuric acid
}
C01B 17/504
. . . .
{
of ammonium sulfates ( of ammonium sulfates containing sulfuric acid solutions C01B 17/585 )
}
C01B 17/505
. . . .
{
of alkali metal sulfates
}
C01B 17/506
. . . .
{
of calcium sulfates
}
C01B 17/507
. . . .
{
of iron sulfates
}
C01B 17/508
. . .
{
by oxidation of sulfur compounds
}
C01B 17/52
. . .
by roasting sulfides ( C22B 1/00 takes precedence )
C01B 17/54
. . .
by burning elemental sulfur
C01B 17/56
. . .
Separation ; Purification
Collapse
C01B 17/58
. . .
Recovery of sulfur dioxide from acid tar or the like
{
or from any waste sulfuric acid
}
C01B 17/585
. . . .
{
from ammonium sulfate containing sulfuric acid solutions
}
C01B 17/60
. . .
Isolation of sulfur dioxide from gases
Collapse
C01B 17/62
.
Methods of preparing sulfites in general ( particular individual sulfites, see the relevant groups of subclasses C01B to C01G , according to the cation )
C01B 17/625
. .
{
metabisulfites or pyrosulfites
}
Collapse
C01B 17/64
.
Thiosulfates ; Dithionites ; Polythionates
Collapse
C01B 17/66
. .
Dithionites
{
or hydrosulfites ( S204 2- )
}
C01B 17/665
. . .
{
Stabilisation by additives subsequent to preparation; Dust prevention by additives
}
Collapse
C01B 17/69
.
Sulfur trioxide ; Sulfuric acid
C01B 17/70
. .
Stabilisation of gamma-form sulfur trioxide
Collapse
C01B 17/74
. .
Preparation
C01B 17/745
. . .
{
from sulfates
}
Collapse
C01B 17/76
. . .
by contact processes
C01B 17/762
. . . .
{
High pressure processes
}
Collapse
C01B 17/765
. . . .
Multi-stage SO3-conversion
C01B 17/7655
. . . . .
{
with intermediate absorption
}
C01B 17/77
. . . .
Fluidised-bed processes
C01B 17/775
. . . .
Liquid phase contacting processes or wet catalysis processes
Collapse
C01B 17/78
. . . .
characterised by the catalyst used
C01B 17/79
. . . . .
containing vanadium
Collapse
C01B 17/80
. . . .
Apparatus
C01B 17/803
. . . . .
{
Converters
}
C01B 17/806
. . . . .
{
Absorbers; Heat exchangers
}
Collapse
C01B 17/82
. . .
of sulfuric acid using a nitrogen oxide process
C01B 17/84
. . . .
Chamber process
C01B 17/86
. . . .
Tower process
C01B 17/88
. .
Concentration of sulfuric acid
Collapse
C01B 17/90
. .
Separation ; Purification
Collapse
C01B 17/901
. . .
{
Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids ( obtaining sulfur dioxide as an intermediate in sulfur trioxide recovery from sulfates, e.g. iron sulfates C01B 17/501 , from spent acids C01B 17/58 )
}
C01B 17/902
. . . .
{
by dialysis
}
C01B 17/903
. . . .
{
by liquid-liquid extraction
}
C01B 17/904
. . . .
{
by ion-exchange
}
C01B 17/905
. . .
{
Removal of organic impurities
}
C01B 17/906
. . .
{
Removal of mercury
}
C01B 17/907
. . .
{
Removal of arsenic
}
C01B 17/908
. . .
{
Removal of antimony or bismuth
}
Collapse
C01B 17/92
. . .
Recovery from acid tar or the like,
{
e.g. alkylation acids ( obtaining sulfur dioxide as an intermediate in sulfur trioxode recovery therefrom C01B 17/58 )
}
C01B 17/925
. . . .
{
by processes involving a liquid-liquid extraction
}
C01B 17/94
. . .
Recovery from nitration acids
Collapse
C01B 17/96
.
Methods for the preparation of sulfates in general ( particular individual sulfates, see the relevant groups of subclasses C01B to C01G , according to the cation )
C01B 17/965
. .
{
Pyrosulfates
}
C01B 17/98
.
Other compounds containing sulfur and oxygen ( persulfuric acids C01B 15/06 ; persulfates C01B 15/08 )
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C01B 19/00
Selenium ; Tellurium ; Compounds thereof ( phosphorus compounds C01B 25/14 )
C01B 19/001
.
{
Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
}
C01B 19/002
.
{
Compounds containing, besides selenium or tellurium, more than one other element, with -O- and -OH not being considered as anions
}
C01B 19/004
.
{
Oxides; Hydroxides
}
C01B 19/005
.
{
Halides
}
C01B 19/007
.
{
Tellurides or selenides of metals ( C01B 19/002 takes precedence )
}
C01B 19/008
.
{
Salts of oxyacids of selenium or tellurium
}
C01B 19/02
.
Elemental selenium or tellurium
C01B 19/04
.
Binary compounds
{
including binary selenium-tellurium compounds ( C01B 19/004 , C01B 19/005 , C01B 19/007 take precedence )
}
Collapse
C01B 21/00
Nitrogen ; Compounds thereof
C01B 21/02
.
Preparation of nitrogen ( by decomposition of ammonia
{
C01B 3/047
}
 )
Collapse
C01B 21/04
.
Purification or separation of nitrogen ( by liquefying F25J )
Collapse
C01B 21/0405
. .
{
Purification or separation processes
}
NOTE
-
In this group, additional features relating to the purification or separation processes are indexed with codes chosen from C01B 2210/0026 to C01B 2210/0098

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C01B 21/0411
. . .
{
Chemical processing only
}
C01B 21/0416
. . . .
{
by oxidation
}
C01B 21/0422
. . . .
{
by reduction
}
C01B 21/0427
. . . .
{
by complexation
}
Collapse
C01B 21/0433
. . .
{
Physical processing only
}
Collapse
C01B 21/0438
. . . .
{
by making use of membranes
}
C01B 21/0444
. . . . .
{
characterised by the membrane
}
Collapse
C01B 21/045
. . . .
{
by adsorption in solids
}
Collapse
C01B 21/0455
. . . . .
{
characterised by the adsorbent
}
C01B 21/0461
. . . . . .
{
Carbon based materials
}
C01B 21/0466
. . . . . .
{
Zeolites
}
C01B 21/0472
. . . . . .
{
Other molecular sieve materials
}
C01B 21/0477
. . . . .
{
Temperature swing adsorption
}
C01B 21/0483
. . . . .
{
in getters
}
C01B 21/0488
. . . .
{
by absorption in liquids
}
C01B 21/0494
. . .
{
Combined chemical and physical processing
}
NOTE
-
In this group, processing steps are indexed with codes chosen from C01B 2210/0001 to C01B 2210/0025

Collapse
C01B 21/06
.
Binary compounds of nitrogen with metals, with silicon, or with boron,
{
or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
}
 ( azides C01B 21/08 )
NOTE
-
Binary compounds, i.e. compounds of nitrogen with only one other element chosen from metals, silicon, boron or carbon, are classified in groups C01B 21/06 or C01B 21/0605 to C01B 21/076 . Compounds of nitrogen with more than one element chosen from metals, silicon or boron are classified in C01B 21/0602

Documents relating to several specific binary compounds are classified in 21/06 only and receive the indexing codes chosen from C01B 21/0602 to C01B 21/076 to identify the specific compounds

C01B 21/0602
. .
{
with two or more other elements chosen from metals, silicon or boron
}
C01B 21/0605
. .
{
Binary compounds of nitrogen with carbon
}
Collapse
C01B 21/0607
. .
{
with alkali metals
}
C01B 21/061
. . .
{
with lithium
}
C01B 21/0612
. .
{
with alkaline-earth metals, beryllium or magnesium
}
Collapse
C01B 21/0615
. .
{
with transition metals other than titanium, zirconium or hafnium
}
C01B 21/0617
. . .
{
with vanadium, niobium or tantalum
}
C01B 21/062
. . .
{
with chromium, molybdenum or tungsten
}
C01B 21/0622
. . .
{
with iron, cobalt or nickel
}
C01B 21/0625
. . .
{
with copper
}
C01B 21/0627
. . .
{
with one or more rare earth metals
}
C01B 21/063
. . .
{
with one or more actinides, e.g. UN, PuN
}
C01B 21/0632
. .
{
with gallium, indium or thallium
}
C01B 21/0635
. .
{
with germanium, tin or lead
}
C01B 21/0637
. .
{
with metals not specified in groups C01B 21/0607 to C01B 21/0635 , other than aluminium, titanium, zirconium or hafnium
}
Collapse
C01B 21/064
. .
with boron
C01B 21/0641
. . .
{
Preparation by direct nitridation of elemental boron
}
C01B 21/0643
. . .
{
Preparation from boron halides
}
C01B 21/0645
. . .
{
Preparation by carboreductive nitridation
}
C01B 21/0646
. . .
{
Preparation by pyrolysis of boron and nitrogen containing compounds
}
C01B 21/0648
. . .
{
After-treatment, e.g. grinding, purification ( transformation of hexagonal into cubic or wurtzitic boron nitride C04B 35/5831 )
}
Collapse
C01B 21/068
. .
with silicon
C01B 21/0682
. . .
{
Preparation by direct nitridation of silicon
}
C01B 21/0685
. . .
{
Preparation by carboreductive nitridation
}
C01B 21/0687
. . .
{
After-treatment, e.g. grinding, purification
}
Collapse
C01B 21/072
. .
with aluminium
Collapse
C01B 21/0722
. . .
{
Preparation by direct nitridation of aluminium
}
C01B 21/0724
. . . .
{
using a plasma
}
C01B 21/0726
. . .
{
Preparation by carboreductive nitridation
}
C01B 21/0728
. . .
{
After-treatment, e.g. grinding, purification
}
Collapse
C01B 21/076
. .
with titanium or zirconium
{
or hafnium
}
C01B 21/0761
. . .
{
Preparation by direct nitridation of titanium, zirconium or hafnium
}
C01B 21/0763
. . .
{
Preparation from titanium, zirconium or hafnium halides
}
C01B 21/0765
. . .
{
Preparation by carboreductive nitridation
}
C01B 21/0766
. . .
{
Preparation by pyrolysis of nitrogen containing titanium, zirconium or hafnium compounds
}
C01B 21/0768
. . .
{
After-treatment, e.g. grinding, purification
}
C01B 21/08
.
Hydrazoic acid ; Azides ; Halogen azides
Collapse
C01B 21/082
.
Compounds containing nitrogen and non-metals
{
and optionally metals
}
 ( C01B 21/06 , C01B 21/08 take precedence )
Collapse
C01B 21/0821
. .
{
Oxynitrides of metals, boron or silicon
}
C01B 21/0823
. . .
{
Silicon oxynitrides
}
C01B 21/0825
. . .
{
Aluminium oxynitrides
}
C01B 21/0826
. . .
{
Silicon aluminium oxynitrides, i.e. sialons
}
C01B 21/0828
. .
{
Carbonitrides or oxycarbonitrides of metals, boron or silicon
}
Collapse
C01B 21/083
. .
containing one or more halogen atoms
Collapse
C01B 21/0832
. . .
{
Binary compounds of nitrogen with halogens
}
Collapse
C01B 21/0835
. . . .
{
Nitrogen trifluoride
}
C01B 21/0837
. . . . .
{
Purification
}
Collapse
C01B 21/084
. . .
containing also one or more oxygen atoms, e.g. nitrosyl halides
Collapse
C01B 21/0842
. . . .
{
Halides of nitrogen oxides
}
C01B 21/0844
. . . . .
{
Nitrosyl fluoride
}
C01B 21/0846
. . . . .
{
Nitrosyl chloride
}
C01B 21/0848
. . . .
{
Nitrosyl perchlorate
}
Collapse
C01B 21/086
. .
containing one or more sulfur atoms
C01B 21/0865
. . .
{
Binary compounds of nitrogen with sulfur
}
Collapse
C01B 21/087
. .
containing one or more hydrogen atoms
Collapse
C01B 21/088
. . .
containing also one or more halogen atoms
Collapse
C01B 21/09
. . . .
Halogeno-amines, e.g. chloramine
C01B 21/091
. . . . .
{
Chloramine, i.e. NH2Cl or dichloramine, i.e. NHCl2
}
Collapse
C01B 21/092
. . .
containing also one or more metal atoms
Collapse
C01B 21/0923
. . . .
{
Metal imides or amides ( silicon imides or amides C01B 21/087 )
}
C01B 21/0926
. . . . .
{
of alkali metals
}
Collapse
C01B 21/093
. . .
containing also one or more sulfur atoms
C01B 21/0935
. . . .
{
Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof
}
C01B 21/094
. . . .
Nitrosyl containing acids
C01B 21/096
. . . .
Amidosulfonic acid ; Salts thereof
Collapse
C01B 21/097
. .
containing phosphorus atoms
C01B 21/0975
. . .
{
containing also one or more sulfur atoms
}
Collapse
C01B 21/098
. . .
Phosphonitrilic dihalides ; Polymers thereof
C01B 21/0983
. . . .
{
Phosphonitrilic difluorides; Polymers thereof
}
C01B 21/0986
. . . .
{
Phosphonitrilic dichlorides; Polymers thereof
}
Collapse
C01B 21/12
. .
Carbamic acid
{
or thiocarbamic acid
}
 ; Salts thereof
C01B 21/125
. . .
{
Metal carbamates
}
Collapse
C01B 21/14
. .
Hydroxylamine ; Salts thereof
Collapse
C01B 21/1409
. . .
{
Preparation
}
C01B 21/1418
. . . .
{
by catalytic reduction of nitrogen oxides or nitrates with hydrogen
}
C01B 21/1427
. . . .
{
by reduction of nitrogen oxides or nitrites with bisulfite or sulfur dioxide, e.g. by the Raschig process
}
C01B 21/1436
. . . .
{
by reaction in the gas phase, e.g. of nitrogen, hydrogen and oxygen
}
C01B 21/1445
. . . .
{
of hydoxylamine from its salts
}
C01B 21/1454
. . . .
{
of hydroxylamine salts by processes not covered by one or more of groups C01B 21/1418 to C01B 21/1445 , e.g. by conversion of one salt into another
}
C01B 21/1463
. . .
{
Concentration
}
C01B 21/1472
. . .
{
Separation
}
C01B 21/1481
. . .
{
Purification
}
C01B 21/149
. . .
{
Stabilisation
}
C01B 21/16
. .
Hydrazine ; Salts thereof
Collapse
C01B 21/20
.
Nitrogen oxides ; Oxyacids of nitrogen ; Salts thereof
C01B 21/203
. .
{
Preparation of nitrogen oxides using a plasma or an electric discharge
}
C01B 21/206
. .
{
Nitric anhydride (N2O5) ( C01B 21/203 takes precedence )
}
C01B 21/22
. .
Nitrous oxide (N2O)
{
( C01B 21/203 takes precedence )
}
Collapse
C01B 21/24
. .
Nitric oxide (NO)
{
( C01B 21/203 takes precedence )
}
Collapse
C01B 21/26
. . .
Preparation by catalytic
{
or non-catalytic
}
 oxidation of ammonia
C01B 21/262
. . . .
{
obtaining nitrogen dioxide or tetroxide
}
C01B 21/265
. . . .
{
characterised by the catalyst
}
C01B 21/267
. . . .
{
Means for preventing deterioration or loss of catalyst or for recovering lost catalyst
}
C01B 21/28
. . . .
Apparatus
Collapse
C01B 21/30
. . .
Preparation by oxidation of nitrogen
{
( C01B 21/26 takes precedence )
}
C01B 21/32
. . . .
Apparatus
C01B 21/34
. .
Nitrogen trioxide (N2O3)
{
( C01B 21/203 takes precedence )
}
C01B 21/36
. .
Nitrogen dioxide ( NO2, N2O4 ) (
{
C01B 21/203
}
 , C01B 21/26 , C01B 21/30 take precedence )
Collapse
C01B 21/38
. .
Nitric acid
C01B 21/40
. . .
Preparation by absorption of oxides of nitrogen
{
( C01B 21/26 takes precedence )
}
C01B 21/42
. . .
Preparation from nitrates
C01B 21/44
. . .
Concentration
{
( C01B 21/40 takes precedence )
}
C01B 21/46
. . .
Purification ; Separation;
{
Stabilisation ( C01B 21/40 takes precedence )
}
C01B 21/48
. .
Methods for the preparation of nitrates in general ( particular individual nitrates, see the relevant groups of subclasses C01B to C01G , according to the cation )
C01B 21/50
. .
Nitrous acid ; Salts thereof
Collapse
C01B 23/00
Noble gases ; Compounds thereof ( liquefying F25J;
{
noble gases obtained by rectification F25J 3/028
}
 )
C01B 23/0005
.
{
Compounds of noble gases
}
Collapse
C01B 23/001
.
{
Purification or separation processes of noble gases
}
Collapse
C01B 23/0015
. .
{
Chemical processing only
}
C01B 23/0021
. . .
{
by oxidation
}
C01B 23/0026
. . .
{
by reduction
}
C01B 23/0031
. . .
{
by complexation
}
Collapse
C01B 23/0036
. .
{
Physical processing only
}
Collapse
C01B 23/0042
. . .
{
by making use of membranes
}
C01B 23/0047
. . . .
{
characterised by the membrane
}
Collapse
C01B 23/0052
. . .
{
by adsorption in solids
}
Collapse
C01B 23/0057
. . . .
{
characterised by the adsorbent
}
C01B 23/0063
. . . . .
{
Carbon based materials
}
C01B 23/0068
. . . . .
{
Zeolites
}
C01B 23/0073
. . . . .
{
Other molecular sieve materials
}
C01B 23/0078
. . . .
{
Temperature swing adsorption
}
C01B 23/0084
. . . .
{
in getters
}
C01B 23/0089
. . .
{
by absorption in liquids
}
C01B 23/0094
. .
{
Combined chemical and physical processing
}
NOTE
-
In this group, processing steps are indexed with codes chosen from C01B 2210/0001 to C01B 2210/0025

Collapse
C01B 25/00
Phosphorus ; Compounds thereof (
{
C01B 6/00
}
 , C01B 21/00 , C01B 23/00 take precedence; perphosphates C01B 15/16 )
Collapse
C01B 25/003
.
{
Phosphorus
}
C01B 25/006
. .
{
Stabilisation ( C01B 25/04 takes precedence )
}
C01B 25/01
.
Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
Collapse
C01B 25/02
.
Preparation of phosphorus
C01B 25/023
. .
of red phosphorus
C01B 25/027
. .
of yellow phosphorus
Collapse
C01B 25/04
.
Purification of phosphorus
C01B 25/043
. .
of red phosphorus
C01B 25/047
. .
of yellow phosphorus
C01B 25/06
.
Hydrogen phosphides
Collapse
C01B 25/08
.
Other phosphides
C01B 25/081
. .
{
of alkali metals, alkaline-earth metals or magnesium
}
Collapse
C01B 25/082
. .
{
of boron, aluminium, gallium or indium
}
C01B 25/084
. . .
{
of boron
}
C01B 25/085
. . .
{
of aluminium
}
C01B 25/087
. . .
{
of gallium or indium
}
C01B 25/088
. .
{
containing plural metal
}
C01B 25/10
.
Halides or oxyhalides of phosphorus
C01B 25/12
.
Oxides of phosphorus
C01B 25/14
.
Sulfur, selenium, or tellurium compounds of phosphorus
Collapse
C01B 25/16
.
Oxyacids of phosphorus ; Salts thereof ( peroxyacids or salts thereof C01B 15/00 )
C01B 25/161
. .
{
containing at least one phosphorus atom with an oxidation number less than five, other than those mentioned below; Salts thereof
}
C01B 25/163
. .
Phosphorous acid ; Salts thereof
C01B 25/165
. .
Hypophosphorous acid ; Salts thereof
C01B 25/168
. .
Pyrophosphorous acid ; Salts thereof
Collapse
C01B 25/18
. .
Phosphoric acid
C01B 25/185
. . .
{
Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
}
C01B 25/20
. . .
Preparation from elemental phosphorus or phosphoric anhydride
Collapse
C01B 25/22
. . .
Preparation by reacting phosphate-containing material with an acid, e.g. wet process
C01B 25/2204
. . . .
{
Arrangements of vessels used in reacting phosphate-containing material in wet process
}
Collapse
C01B 25/2208
. . . .
{
with an acid or a mixture of acids other than sulfuric acid
}
C01B 25/2212
. . . . .
{
with hydrochloric acid or hydrogen chloride in aqueous medium
}
C01B 25/2216
. . . . .
{
with nitric acid or nitrous vapours in aqueous medium
}
Collapse
C01B 25/222
. . . .
with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
Collapse
C01B 25/223
. . . . .
only one form of calcium sulfate being formed
C01B 25/2235
. . . . . .
{
Anhydrite processes
}
C01B 25/225
. . . . . .
Dihydrate process
C01B 25/226
. . . . . .
Hemihydrate process
Collapse
C01B 25/228
. . . . .
one form of calcium sulfate being formed and then converted to another form
C01B 25/2285
. . . . . .
{
Dihydrate-anhydrite or hemihydrate-anhydrite process
}
Collapse
C01B 25/229
. . . . . .
Hemihydrate-dihydrate process
C01B 25/2295
. . . . . . .
{
the conversion being performed in one or more vessels different from those used for reaction after separation of phosphoric acid
}
C01B 25/231
. . . . . .
Dihydrate-hemihydrate process
C01B 25/232
. . . . .
Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently lixiviating the obtained mass, e.g. clinker process
Collapse
C01B 25/234
. . .
Purification ; Stabilisation ; Concentration ( purification concomitant with preparation C01B 25/22 ; preparation involving solvent-solvent extraction C01B 25/46 )
Collapse
C01B 25/2343
. . . .
{
Concentration concomitant with purification, e.g. elimination of fluorine
}
C01B 25/2346
. . . . .
{
Concentration
}
C01B 25/235
. . . .
Clarification ; Stabilisation to prevent post-precipitation of dissolved impurities
Collapse
C01B 25/237
. . . .
Selective elimination of impurities
{
( C01B 25/2343 takes precedence )
}
Collapse
C01B 25/2372
. . . . .
{
Anionic impurities, e.g. silica or boron compounds
}
C01B 25/2375
. . . . . .
{
Fluoride or fluosilicate anion
}
C01B 25/2377
. . . . . .
{
Sulfate
}
C01B 25/238
. . . . .
Cationic impurities,
{
e.g. arsenic compounds
}
C01B 25/24
. .
Condensed phosphoric acids
Collapse
C01B 25/26
. .
Phosphates ( perphosphates C01B 15/16 )
C01B 25/265
. . .
{
General methods for obtaining phosphates
}
C01B 25/28
. . .
Ammonium phosphates
Collapse
C01B 25/30
. . .
Alkali metal phosphates
Collapse
C01B 25/301
. . . .
{
Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates ( using ion-exchangers C01B 25/30 )
}
C01B 25/303
. . . . .
{
with elimination of impurities
}
Collapse
C01B 25/305
. . . .
{
Preparation from phosphorus-containing compounds by alkaline treatment
}
C01B 25/306
. . . . .
{
from phosphates
}
C01B 25/308
. . . .
{
Methods for converting an alkali metal orthophosphate into another one; Purification; Decolorasing; Dehydrating; Drying
}
Collapse
C01B 25/32
. . .
Phosphates of magnesium, calcium, strontium, or barium
C01B 25/321
. . . .
{
Methods for converting an alkaline earth metal ortho-phosphate into another ortho-phosphate ( by reaction, e.g. of phosphate rock with phosphoric acid C01B 25/322 )
}
C01B 25/322
. . . .
{
Preparation by neutralisation of orthophosphoric acid
}
C01B 25/324
. . . .
{
Preparation from a reaction solution obtained by acidifying with an acid other than orthophosphoric acid
}
C01B 25/325
. . . .
{
Preparation by double decomposition
}
C01B 25/327
. . . .
{
After-treatment ( increasing the phosphate content of ores C01B 25/32 )
}
C01B 25/328
. . . .
{
Defluorination during or after the preparation
}
C01B 25/34
. . . .
Magnesium phosphates
C01B 25/36
. . .
Aluminium phosphates
Collapse
C01B 25/37
. . .
Phosphates of heavy metals
C01B 25/372
. . . .
{
of titanium, vanadium, zirconium, niobium, hafnium or tantalum
}
C01B 25/375
. . . .
{
of iron
}
C01B 25/377
. . . .
{
of manganese
}
Collapse
C01B 25/38
. . .
Condensed phosphates
C01B 25/385
. . . .
{
of alkaline-earth metals or magnesium
}
Collapse
C01B 25/39
. . . .
of alkali metals
C01B 25/395
. . . . .
{
Preparation and dehydrating
}
Collapse
C01B 25/40
. . . .
Polyphosphates
C01B 25/405
. . . . .
{
of ammonium
}
Collapse
C01B 25/41
. . . . .
of alkali metals
Collapse
C01B 25/412
. . . . . .
{
Preparation from alkali metal orthophosphates
}
C01B 25/414
. . . . . . .
{
Apparatus
}
C01B 25/416
. . . . . . .
{
Pure alkali metal polyphosphates from impure starting materials
}
C01B 25/418
. . . . . .
{
After-treatment
}
Collapse
C01B 25/42
. . . .
Pyrophosphates
C01B 25/425
. . . . .
{
of alkali metals
}
Collapse
C01B 25/44
. . . .
Metaphosphates
C01B 25/445
. . . . .
of alkali metals
Collapse
C01B 25/45
. . .
containing plural metal, or metal and ammonium
C01B 25/451
. . . .
{
containing metal and ammonium
}
C01B 25/453
. . . .
{
having molecular-sieve properties
}
WARNING
-
Group C01B 25/453 is no longer used for the classification of new documents from May, 1995. The backlog of this groups is continuously being reclassified to the appropriate subgroups of C01B 37/00 and C01B 39/00 .

Collapse
C01B 25/455
. . .
containing halogen
{
( completely halogenated alkali metal phosphates C01D , e.g. lithium hexafluorophosphate C01D 15/005 )
}
C01B 25/4555
. . . .
{
Hypochlorite-phosphate double salts, e.g. 4(Na3PO411H2O). NaOCl or so-called chlorinated trisodium phosphate
}
Collapse
C01B 25/46
. .
Preparation involving solvent-solvent extraction ( solvent extraction in general B01D 11/00 )
Collapse
C01B 25/461
. . .
{
the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound ( selective extraction of impurities contained in acid C01B 25/237 )
}
NOTE
-
The extracting agent may be diluted with a compound or a mixture of compounds which are not solvents for phosphoric acid, e.g. a hydrocarbon

Documents which belong to more than one subgroup of C01B 25/462 to C01B 25/466 are classified by a combination, e.g. C01B 25/462 +B4+B8

C01B 25/462
. . . .
{
the extracting agent being alcohol or a mixture of alcohols
}
C01B 25/463
. . . .
{
the extracting agent being a ketone or a mixture of ketones
}
C01B 25/464
. . . .
{
the extracting agent being an ether or a mixture of ethers
}
C01B 25/465
. . . .
{
the extracting agent being an ester or a mixture of esters
}
C01B 25/466
. . . .
{
the extracting agent being a nitrogenous solvent or a mixture of nitrogenous solvents such as amines or amides
}
C01B 25/467
. . .
{
the extracting agent being already present during the phosphate-containing material reaction step
}
C01B 25/468
. . .
{
the extraction being performed on the reaction slurry itself, i.e. without separating the acid ( C01B 25/232 takes precedence )
}
Collapse
C01B 31/00
Carbon ; Compounds thereof (
{
C01B 6/00
}
 , C01B 21/00 , C01B 23/00 take precedence; percarbonates C01B 15/10 ; carbon black C09C 1/48 ; gas carbon production C10B )
C01B 31/005
.
{
Carbon fluorides, e.g. ( CF ) n or (C2F)n ( preparation of intercalation compounds of graphite with fluorine C01B 31/0415 )
}
Collapse
C01B 31/02
.
Preparation of carbon ( by using ultra high pressure, e.g. for the formation of diamonds, B01J 3/06 ; by crystal growth C30B ) ; Purification;
{
After-treatment
}
Collapse
C01B 31/0206
. .
{
Nanosized carbon materials ( graphene C01B 31/0438 )
}
C01B 31/0213
. . .
{
Fullerenes
}
Collapse
C01B 31/022
. . .
{
Carbon nanotubes
}
NOTE
-
In groups C01B 31/022 to C01B 31/0293 it is desirable to add indexing codes for structural aspects or properties of carbon nanotubes. The indexing codes are chosen from C01B 2202/00 to C01B 2202/36

Collapse
C01B 31/0226
. . . .
{
Preparation
}
C01B 31/0233
. . . . .
{
characterized by the catalyst
}
C01B 31/024
. . . . .
{
being a continuous process
}
C01B 31/0246
. . . . .
{
in the liquid phase
}
Collapse
C01B 31/0253
. . . .
{
After-treatments
}
C01B 31/026
. . . . .
{
Purification
}
C01B 31/0266
. . . . .
{
Sorting
}
C01B 31/0273
. . . . .
{
Derivatisation, solubilisation or dispersion in solvents
}
C01B 31/028
. . . . .
{
Cutting
}
C01B 31/0286
. . . . .
{
Opening or filling
}
C01B 31/0293
. . .
{
Other structures, e.g. nano-onions, nano-scrolls, nano-horns, nano-cones or nano-walls
}
Collapse
C01B 31/04
. .
Graphite, including modified graphite e.g. graphitic oxides, intercalated graphite, expanded graphite or graphene
NOTE
-
In groups C01B 31/04 to C01B 31/0492 it is desirable to add indexing codes for structural aspects or properties of graphene. The indexing codes are chosen from C01B 2204/00 to C01B 2204/32

C01B 31/0407
. . .
{
Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
}
C01B 31/0415
. . .
{
Intercalation
}
WARNING
-
Group C01B 31/0415 is not complete pending a reclassification. See also group C01B 31/00 D

C01B 31/0423
. . .
{
Expanded or exfoliated graphite
}
WARNING
-
Groups C01B 31/043 to C01B 31/0492 are not complete pending a reclassification. See also groups C01B31/00B and C01B 31/04

C01B 31/043
. . .
{
Graphitic oxides, graphitic acids or salts thereof
}
Collapse
C01B 31/0438
. . .
{
Graphene
}
Collapse
C01B 31/0446
. . . .
{
Preparation
}
C01B 31/0453
. . . . .
{
by CVD
}
C01B 31/0461
. . . . .
{
by epitaxial growth
}
Collapse
C01B 31/0469
. . . . .
{
by exfoliation
}
C01B 31/0476
. . . . . .
{
starting from graphitic oxide
}
Collapse
C01B 31/0484
. . . .
{
After-treatments
}
C01B 31/0492
. . . . .
{
Purification
}
Collapse
C01B 31/06
. .
Diamond
C01B 31/065
. . .
{
After-treatment, e.g. purification, irradiation
}
Collapse
C01B 31/08
.
Active carbon
C01B 31/081
. .
{
from waste materials, e.g. tyres, spent sulfite pulp liquor
}
C01B 31/082
. .
{
from distillation residues of coal or petroleum; from petroleum acid sludge
}
C01B 31/083
. .
{
After-treatment, e.g. purification ( granulation C01B 31/14 )
}
C01B 31/084
. .
{
Coating; Grafting; Microencapsulation
}
C01B 31/085
. .
{
with "molecular sieve" properties
}
C01B 31/086
. .
{
Preparation, reactivation or regeneration by a physical process, e.g. by irradiation, by using electric current passing through a carbonaceous feedstock, by using recyclable inert heating bodies
}
C01B 31/087
. .
{
Reactivation or regeneration ( by a physical process C01B 31/086 )
}
C01B 31/088
. .
{
Apparatus ( C01B 31/086 takes precedence )
}
C01B 31/089
. .
{
Making shaped products, e.g. fibres, spheres, membranes, foam, or the like ( granulation C01B 31/14 )
}
C01B 31/10
. .
Preparation by using gaseous activating agents
{
( C01B 31/086 , C01B 31/088 take precedence )
}
Collapse
C01B 31/12
. .
Preparation by using non-gaseous activating agents
{
( C01B 31/086 , C01B 31/088 take precedence )
}
C01B 31/125
. . .
{
Preparation by impregnation with a metallic compound
}
C01B 31/14
. .
Granulation ( apparatus B01J 2/00 )
NOTE
-
In this group, the term granulation covers the methods of preparation of active carbon using carbonaceous precursors per se and binders, e.g. pitch, and producing the granules

C01B 31/18
.
Carbon monoxide ( metal carbonyls C01G )
Collapse
C01B 31/20
.
Carbon dioxide
C01B 31/22
. .
Solidifying
C01B 31/24
.
Methods for the preparation of carbonates or bicarbonates in general ( percarbonates C15/10; particular individual carbonates, see the relevant groups in C01B to C01G according to the cation )
Collapse
C01B 31/26
.
Compounds containing carbon and sulfur, e.g. carbon disulfide, carbon oxysulfide ; Thiophosgene
Collapse
C01B 31/262
. .
{
Carbon disulfide
}
C01B 31/265
. . .
{
Preparation by reacting sulfur or a sulfur compound with a hydrocarbon
}
C01B 31/267
. .
{
Carbon oxysulfide
}
C01B 31/28
.
Phosgene
Collapse
C01B 31/30
.
Carbides ( alloys C22 )
C01B 31/301
. .
{
Oxycarbides, sulfocarbides or mixtures of carbides with other bodies, e.g. graphite; Carbides of other non-metals, e.g. silicocarbides, borocarbides
}
NOTE
-
Mixtures of carbides, other than those covered by group C01B 31/308 , and belonging to more than one of the groups C01B 31/303 to C01B 31/36 are classified in C01B 31/301

C01B 31/303
. .
{
Simple carbides of elements not covered below
}
C01B 31/305
. .
{
Titanium carbides
}
C01B 31/306
. .
{
Carbides of actinides
}
C01B 31/308
. .
{
Carbides of alkali metals, strontium, barium or magnesium; Mixtures thereof with calcium carbide
}
C01B 31/32
. .
Calcium carbide
C01B 31/34
. .
Tungsten or molybdenum carbides
C01B 31/36
. .
Carbides of silicon or boron
Collapse
C01B 33/00
Silicon ; Compounds thereof (
{
C01B 6/00
}
 , C01B 21/00 , C01B 23/00 take precedence; persilicates C01B 15/14 ; carbides C01B 31/36 )
Collapse
C01B 33/02
.
Silicon ( forming single crystals or homogeneous polycrystalline material with defined structure C30B )
Collapse
C01B 33/021
. .
Preparation ( chemical coating from the vapour phase C23C 16/00 )
Collapse
C01B 33/023
. . .
by reduction of silica or
{
free
}
 silica-containing material
C01B 33/025
. . . .
with carbon or a solid carbonaceous material, i.e. carbo-thermal process
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C01B 33/027
. . .
by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
C01B 33/029
. . . .
by decomposition of monosilane
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C01B 33/03
. . . .
by decomposition of silicon halides or halosilanes or reduction thereof with hydrogen as the only reducing agent
C01B 33/031
. . . . .
by decomposition of silicon tetraiodide
C01B 33/033
. . . .
by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents
C01B 33/035
. . . .
by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal, e.g. tantalum or tungsten, or in the presence of heated silicon rods on which the formed silicon is deposited, a silicon rod being obtained, e.g. Siemens process
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C01B 33/037
. .
Purification ( by zone-melting C30B 13/00 )
C01B 33/039
. . .
by conversion of the silicon into a compound, optional purification of the compound, and reconversion into silicon
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C01B 33/04
.
Hydrides of silicon
C01B 33/043
. .
{
Monosilane
}
C01B 33/046
. .
{
Purification
}
C01B 33/06
.
Metal silicides ( alloys C22 )
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C01B 33/08
.
Compounds containing halogen
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C01B 33/10
. .
Compounds containing silicon, fluorine, and other elements
C01B 33/103
. . .
{
Fluosilicic acid; Salts thereof
}
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C01B 33/107
. .
Halogenated silanes
C01B 33/10705
. . .
{
Tetrafluoride
}
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C01B 33/1071
. . .
{
Tetrachloride, trichlorosilane or silicochloroform, dichlorosilane, monochlorosilane or mixtures thereof
}
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C01B 33/10715
. . . .
{
prepared by reacting chlorine with silicon or a silicon-containing material
}
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C01B 33/10721
. . . . .
{
with the preferential formation of tetrachloride
}
C01B 33/10726
. . . . . .
{
from silicon
}
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C01B 33/10731
. . . . .
{
with the preferential formation of trichlorosilane
}
C01B 33/10736
. . . . . .
{
from silicon
}
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C01B 33/10742
. . . .
{
prepared by hydrochlorination of silicon or of a silicon-containing material
}
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C01B 33/10747
. . . . .
{
with the preferential formation of tetrachloride
}
C01B 33/10752
. . . . . .
{
from silicon
}
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C01B 33/10757
. . . . .
{
with the preferential formation of trichlorosilane
}
C01B 33/10763
. . . . . .
{
from silicon
}
C01B 33/10768
. . .
{
Tetrabromide; Tetraiodide
}
C01B 33/10773
. . .
{
Halogenated silanes obtained by disproportionation and molecular rearrangement of halogenated silanes
}
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C01B 33/10778
. . .
{
Purification
}
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C01B 33/10784
. . . .
{
by adsorption
}
C01B 33/10789
. . . . .
{
the adsorbing material being formed in situ, e.g. by partial hydrolysis
}
C01B 33/10794
. . . .
{
by forming addition compounds or complexes, the reactant being possibly contained in an adsorbent
}
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C01B 33/113
.
Silicon oxides ; Hydrates thereof
{
( preparing monoxide by reduction of siliceous material C01B 33/182 )
}
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C01B 33/12
. .
Silica ; Hydrates thereof, e.g. lepidoic silicic acid
C01B 33/122
. . .
{
Lepidoic silicic acid
}
C01B 33/124
. . .
{
Preparation of adsorbing porous silica not in gel form and not finely divided, i.e. silicon skeletons, by acidic treatment of siliceous materials
}
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C01B 33/126
. . .
{
Preparation of silica of undetermined type
}
C01B 33/128
. . . .
{
by acidic treatment of aqueous silicate solutions
}
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C01B 33/14
. . .
Colloidal silica, e.g. dispersions, gels, sols
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C01B 33/141
. . . .
Preparation of hydrosols or aqueous dispersions
C01B 33/1412
. . . . .
{
by oxidation of silicon in basic medium
}
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C01B 33/1415
. . . . .
{
by suspending finely divided silica in water
}
C01B 33/1417
. . . . . .
{
an aqueous dispersion being obtained
}
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C01B 33/142
. . . . .
by acidic treatment of silicates
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C01B 33/143
. . . . . .
of aqueous solutions of silicates
C01B 33/1435
. . . . . . .
{
using ion exchangers
}
C01B 33/145
. . . .
Preparation of hydroorganosols, organosols or dispersions in an organic medium
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C01B 33/146
. . . .
After-treatment of sols (
{
preparation of hydrosols or aqueous dispersions from hydroorganosols, organosols or dispersions in an organic medium C01B 33/141
}
 ; preparation of hydroorganosols, organosols or dispersions in an organic medium from hydrosols
{
or aqueous dispersions
}
 C01B 33/145 )
C01B 33/1465
. . . . .
{
"Build-up" of particles using only one sol and a "heel" consisting or not of the sol
}
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C01B 33/148
. . . . .
Concentration ; Drying ; Dehydration ; Stabilisation ; Purification
{
( C01B 33/1465 takes precedence )
}
C01B 33/1485
. . . . . .
{
Stabilisation, e.g. prevention of gelling; Purification
}
C01B 33/149
. . . . .
Coating
C01B 33/151
. . . . .
by progressively adding a sol to a different sol, i.e. "build-up" of particles using a "heel"
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C01B 33/152
. . . .
Preparation of hydrogels
C01B 33/1525
. . . . .
{
from or via fluosilicic acid or salts thereof
}
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C01B 33/154
. . . . .
by acidic treatment of aqueous silicate solutions
C01B 33/1543
. . . . . .
{
using ion exchangers
}
C01B 33/1546
. . . . . .
{
the first formed hydrosol being converted to a hydrogel by introduction into an organic medium immiscible or only partly miscible with water
}
C01B 33/155
. . . .
Preparation of hydroorganogels or organogels
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C01B 33/157
. . . .
After-treatment of gels
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C01B 33/158
. . . . .
Purification ; Drying ; Dehydrating
C01B 33/1585
. . . . . .
{
Dehydration into aerogels
}
C01B 33/159
. . . . .
Coating or hydrophobisation
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C01B 33/16
. . .
Preparation of silica xerogels
C01B 33/163
. . . .
{
by hydrolysis of organosilicon compounds, e.g. ethyl orthosilicate
}
C01B 33/166
. . . .
{
by acidification of silicate in the presence of an inert organic phase
}
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C01B 33/18
. . .
Preparation of finely divided silica neither in sol nor in gel form ; After-treatment thereof ( preparation of aerogels by dehydrating gels C01B 33/158 ; treatment to enhance the pigmenting or filling properties C09C )
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C01B 33/181
. . . .
{
by a dry process
}
C01B 33/182
. . . . .
{
by reduction of a siliceous material, e.g. with a carbonaceous reducing agent and subsequent oxidation of the silicon monoxide formed
}
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C01B 33/183
. . . . .
{
by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
}
C01B 33/184
. . . . . .
{
by hydrolysis of tetrafluoride
}
C01B 33/185
. . . . .
{
of crystalline silica-polymorphs having molecular sieve properties, e.g. silicalites
}
C01B 33/186
. . . .
{
from or via fluosilicic acid or salts thereof by a wet process
}
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C01B 33/187
. . . .
by acidic treatment of silicates
C01B 33/193
. . . . .
of aqueous solutions of silicates
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C01B 33/20
.
Silicates ( persilicates C01B 15/14 ;
{
containing aluminium C01B 33/26
}
 )
C01B 33/22
. .
Magnesium silicates
C01B 33/24
. .
Alkaline-earth metal silicates
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C01B 33/26
. .
Aluminium-containing silicates,
{
i.e. silico-aluminates
}
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C01B 33/28
. . .
Base exchange silicates, e.g. zeolites ( regeneration B01J 49/00 )
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C01B 33/2807
. . . .
{
Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures ( not used, see subgroups )
}
NOTE
-
Documents which belong to more than one subgroup of C01B33/C01B28B2 to C01B33/C01B28B8 will be described by a combination, e.g. C01B33/C01B28B2B + B4B. The documents which pertain to the structure of a specific molecular sieve are classified in the relevant subgroup

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C01B 33/2815
. . . . .
{
of type A ( UNION CARBIDE trade name; corresponds to GRACE`s types Z-12 or Z-12L )
}
C01B 33/2823
. . . . . .
{
from aqueous solutions of an alkali metal aluminate and an alkali metal silicate excluding any other source of alumina or silica
}
C01B 33/283
. . . . . .
{
from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay-type, e.g. kaolin or metakaolin or its exotherm modification or allophane ( containing a single clay substantially chemically modified with an acid, i.e. beyond the activation state C01B 33/2815 )
}
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C01B 33/2838
. . . . .
{
of faujasite type, or type X or Y ( UNION CARBIDE trade names; correspond to GRACE`s types Z-14 and Z-14HS, respectively )
}
C01B 33/2846
. . . . . .
{
of type X
}
C01B 33/2853
. . . . . .
{
of type Y
}
C01B 33/2861
. . . . .
{
of mordenite type, e.g. ptilolite or dachiardite
}
C01B 33/2869
. . . . .
{
of other types characterised by an X-ray spectrum and a definite composition
}
C01B 33/2876
. . . . .
{
from a reacting mixture containing an amine or an organic cation, e.g. a quaternary onium cation-ammonium, phosphonium, stibonium
}
C01B 33/2884
. . . . .
{
the aluminium or the silicon in the network being partly replaced
}
C01B 33/2892
. . . . .
{
containing an element or a compound occluded in the pores of the network, e.g. an oxide already present in the starting reaction mixture
}
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C01B 33/32
. .
Alkali metal silicates (
{
C01B 33/20 B
}
 , C01B 33/26 take precedence] )
C01B 33/325
. . .
{
After-treatment, e.g. purification or stabilsation of solutions, granulation; Dissolution; Obtaining solid silicate, e.g. from a solution by spray-drying, flashing off water or adding a coagulant
}
NOTE
-
In this group, obtaining solid silicate, e.g. as a hydrate of a crystalline silicate, from a solution or a hydrate melt by heating or cooling with or without seeding, is not considered as after-treatment, but classified in group C01B 33/32

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C01B 33/36
. .
having base-exchange properties but not having molecular sieve properties ( regeneration thereof B01J 49/00 )
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C01B 33/38
. . .
Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
{
( activation of naturally occurring clays B01J 20/12 ; pillared layered base-exchange silicates B01J 29/049 )
}
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C01B 33/40
. . . .
Clays
C01B 33/405
. . . . .
{
not containing aluminium
}
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C01B 33/42
. . . .
Micas;
{
Interstratified clay-mica products ( delaminated mica or vermiculite platelets obtained by a process involving cation-exchange C04B 14/208 )
}
C01B 33/425
. . . . .
{
not containing aluminium
}
C01B 33/44
. . . .
Products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds, e.g. organoclay material
C01B 33/46
. . .
Amorphous silicates, e.g. so-called "amorphous zeolites" ( crystalline zeolites C01B 39/00 )
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C01B 35/00
Boron ; Compounds thereof ( monoborane, diborane, metal borohydrides or addition complexes thereof C01B 6/00 ; perborates C01B 15/12 ; binary compounds with nitrogen C01B 21/06 ;
{
compounds of noble gases C01B 23/0005
}
 ; phosphides C01B 25/08 ; carbides C01B 31/36 ; alloys containing boron C22 )
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C01B 35/02
.
Boron ; Borides
C01B 35/023
. .
{
Boron
}
C01B 35/026
. .
{
Higher boron hydrides, i.e. containing at least three boron atoms
}
C01B 35/04
. .
Metal borides
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C01B 35/06
.
Boron halogen compounds
C01B 35/061
. .
{
Halides
}
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C01B 35/063
. .
{
Tetrafluoboric acid; Salts thereof
}
C01B 35/065
. . .
{
Tetrafluoboric acid
}
C01B 35/066
. . .
{
Alkali metal tetrafluoborates
}
C01B 35/068
. .
{
Halogenated hydrides
}
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C01B 35/08
.
Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
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C01B 35/10
. .
Compounds containing boron and oxygen ( C01B 35/06 takes precedence )
C01B 35/1009
. . .
{
having molecular-sieve properties
}
C01B 35/1018
. . .
{
Carbonyl compounds derived from boron hydrides
}
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C01B 35/1027
. . .
{
Oxides
}
C01B 35/1036
. . . .
{
Boric anhydride
}
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C01B 35/1045
. . .
{
Oxyacids
}
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C01B 35/1054
. . . .
{
Orthoboric acid
}
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C01B 35/1063
. . . . .
{
Preparation from boron ores or borates using acids or salts
}
C01B 35/1072
. . . . . .
{
by means of ammonia-carbon dioxide
}
C01B 35/1081
. . . . .
{
Preparation by working up other natural sources, e.g. seawater
}
C01B 35/109
. . . . .
{
Purification; Separation; Concentration
}
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C01B 35/12
. . .
Borates
{
( C01B 35/1063 takes precedence )
}
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C01B 35/121
. . . .
{
of alkali metal
}
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C01B 35/122
. . . . .
{
Sodium tetraborates; Hydrates thereof, e.g. borax
}
C01B 35/123
. . . . . .
{
Preparation from boron ores or other borates
}
C01B 35/124
. . . . . .
{
Preparation by working up natural brines, e.g. seawater
}
C01B 35/125
. . . . . .
{
Purification; Concentration; Dehydration; Stabilisation; Other after-treatment
}
C01B 35/126
. . . .
{
of alkaline-earth metals, beryllium, aluminium or magnesium
}
C01B 35/127
. . . .
{
of heavy metals
}
C01B 35/128
. . . .
{
containing plural metal or metal and ammonium
}
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C01B 35/14
. .
Compounds containing boron and nitrogen, phosphorus, sulfur, selenium or tellurium
C01B 35/143
. . .
{
Phosphates
}
C01B 35/146
. . .
{
Compounds containing boron and nitrogen, e.g. borazoles ( ammonium tetrafluoborates C01B 35/063 ; ammonium borates C01B 35/12 )
}
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Guide Heading:
Compounds characterised primarily by their physical or chemical properties, rather than by their chemical constitution
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C01B 37/00
Compounds having molecular sieve properties but not having base-exchange properties
NOTE
-
Compounds classified in main group C01B 37/00 are also classified in other groups of class C01 according to their composition

C01B 37/002
.
{
Metallophosphates not containing aluminium, e.g. gallophosphates or silicogallophosphates
}
C01B 37/005
.
{
Silicates, i.e. so-called metallosilicalites or metallozeosilites
}
C01B 37/007
.
{
Borosilicates
}
C01B 37/02
.
Crystalline silica-polymorphs, e.g. silicalites
{
dealuminated aluminosilicate zeolites
}
C01B 37/04
.
Aluminophosphates ( APO compounds )
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C01B 37/06
.
Aluminophosphates containing other elements, e.g. metals, boron
C01B 37/065
. .
{
the other elements being metals only
}
C01B 37/08
. .
Silicoaluminophosphates ( SAPO compounds ) ,
{
e.g. CoSAPO
}
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C01B 39/00
Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites ; Their preparation ; After-treatment, e.g. ion-exchange or dealumination ( treatment to modify the sorption properties, e.g. shaping using a binder, B01J 20/10 ; treatment to modify the catalytic properties, e.g. combination of treatments to make the zeolites appropriate to their use as a catalyst, B01J 29/04 ; treatment to improve the ion-exchange properties B01J 39/14 ; regeneration or reactivation of ion-exchange properties B01J 49/00 ; preparation of stabilised suspensions used in detergents C11D 3/12 )
NOTE
-
In this group, the following term is used with the meaning indicated:
- "zeolites" means:
(i) crystalline aluminosilicates with base-exchange and molecular sieve properties, having
three dimensional, microporous lattice framework structure of tetrahedral oxide units;
(ii) compounds isomorphous to those of the former category, wherein the aluminium or silicon
atoms in the framework are partly or wholly replaced by atoms of other elements, e.g.
by gallium, germanium, phosphorus or boron.

Compounds classified in main group C01B 39/00 are also classified in other groups of class C01 according to their composition

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C01B 39/02
.
Crystalline aluminosilicate zeolites ; Isomorphous compound thereof ; Direct preparation thereof ; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants ; After-treatment thereof
C01B 39/023
. .
{
Preparation of physical mixtures or intergrowth products of zeolites chosen from group C01B 39/04 or two or more of groups C01B 39/14 to C01B 39/48
}
C01B 39/026
. .
{
After-treatment
}
C01B 39/04
. .
using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound
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C01B 39/06
. .
Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements,
{
i.e. by direct or secondary synthesis
}
C01B 39/065
. . .
{
Galloaluminosilicates; Group IVB- metalloaluminosilicates; Ferroaluminosilicates
}
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C01B 39/08
. . .
the aluminium atoms being wholly replaced
C01B 39/082
. . . .
{
Gallosilicates
}
C01B 39/085
. . . .
{
Group IVB- metallosilicates
}
C01B 39/087
. . . .
{
Ferrosilicates
}
C01B 39/10
. . .
the replacing atoms being
{
at least
}
 phosphorus atoms
C01B 39/12
. . .
the replacing atoms being
{
at least
}
 boron atoms
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C01B 39/14
. .
Type A
C01B 39/145
. . .
{
using at least one organic template directing agent
}
C01B 39/16
. . .
from aqueous solutions of an alkali metal aluminate and an alkali metal silicate excluding any other source of alumina or silica but seeds
{
( C01B 39/145 takes precedence )
}
C01B 39/18
. . .
from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay type, e.g. kaolin or metakaolin or its exotherm modification or allophane
{
( C01B 39/145 takes precedence )
}
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C01B 39/20
. .
Faujasite type, e.g. type X or Y
C01B 39/205
. . .
{
using at least one organic template directing agent; Hexagonal faujasite; Intergrowth products of cubic and hexagonal faujasite
}
C01B 39/22
. . .
Type X
{
( C01B 39/205 takes precedence )
}
C01B 39/24
. . .
Type Y
{
( C01B 39/205 takes precedence )
}
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C01B 39/26
. .
Mordenite type
{
( C01B 39/023 , C01B 39/026 , C01B 39/06 take precedence )
}
C01B 39/265
. . .
{
using at least one organic template directing agent
}
C01B 39/28
. .
Phillipsite or harmotome type
{
( C01B 39/023 , C01B 39/026 , C01B 39/06 take precedence )
}
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C01B 39/30
. .
Erionite or offretite type, e.g. zeolite T
C01B 39/305
. . .
{
using at least one organic template directing agent
}
C01B 39/32
. .
Type L
C01B 39/34
. .
Type ZSM-4
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C01B 39/36
. .
Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
C01B 39/365
. . .
{
Type ZSM-8; Type ZSM-11; ZSM 5/11 intermediate
}
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C01B 39/38
. . .
Type ZSM-5
C01B 39/40
. . . .
using at least one organic template directing agent
C01B 39/42
. .
Type ZSM-12
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C01B 39/44
. .
Ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38
C01B 39/445
. . .
{
using at least one organic template directing agent
}
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C01B 39/46
. .
Other types characterised by their X-ray diffraction pattern and their defined composition
{
( C01B 39/023 , C01B 39/026 , C01B 39/06 take precedence )
}
C01B 39/48
. . .
using at least one organic template directing agent
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C01B 39/50
.
Zeolites wherein inorganic bases or salts occlude channels in the lattice framework, e.g. sodalite, cancrinite, nosean, hauynite
{
( ultramarine C09C 1/32 )
}
C01B 39/52
. .
Sodalites
C01B 39/54
.
Phosphates, e.g. APO or SAPO compounds
NOTE
-
Phosphates having either a poorly defined or a weak base-exchange capacity such as MAPO`s, SAPO`s or BAPO`s are classified in C01B 37/00

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C01B 2201/00
Preparation of ozone by electrical discharge
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C01B 2201/10
.
Dischargers used for production of ozone
C01B 2201/12
. .
Plate-type dischargers
C01B 2201/14
. .
Concentric/tubular dischargers
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C01B 2201/20
.
Electrodes used for obtaining electrical discharge
C01B 2201/22
. .
Constructional details of the electrodes
C01B 2201/24
. .
Composition of the electrodes
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C01B 2201/30
.
Dielectrics used in the electrical dischargers
C01B 2201/32
. .
Constructional details of the dielectrics
C01B 2201/34
. .
Composition of the dielectrics
C01B 2201/40
.
using several dischargers in series
C01B 2201/50
.
Part of the product being recycled
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C01B 2201/60
.
Feed streams for electrical dischargers
C01B 2201/62
. .
Air
C01B 2201/64
. .
Oxygen
C01B 2201/66
. .
Pretreatment of the feed
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C01B 2201/70
.
Cooling of the discharger ; Means for making cooling unnecessary
C01B 2201/72
. .
by air
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C01B 2201/74
. .
by liquid
C01B 2201/76
. . .
Water
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C01B 2201/80
.
Additional processes occurring alongside the electrical discharges, e.g. catalytic processes
C01B 2201/82
. .
Treatment with ultraviolet light
C01B 2201/84
. .
Treatment with magnetic fields
C01B 2201/90
.
Control of the process
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C01B 2202/00
Structure or properties of carbon nanotubes
C01B 2202/02
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Single-walled nanotubes
C01B 2202/04
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Nanotubes with a specific amount of walls
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Multi-walled nanotubes
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Aligned nanotubes
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Filled nanotubes
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Nanotubes characterized by their properties
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Electronic properties
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Thermal properties
C01B 2202/26
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Mechanical properties
C01B 2202/28
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Solid content in solvents
C01B 2202/30
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Purity
C01B 2202/32
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Specific surface area
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Length
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Diameter
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C01B 2203/00
Integrated processes for the production of hydrogen or synthesis gas ( reactors or details thereof B01J 2208/00 to B01J 2219/00 )
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C01B 2203/02
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Processes for making hydrogen or synthesis gas
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C01B 2203/0205
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containing a reforming step
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C01B 2203/0211
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containing a non-catalytic reforming step
C01B 2203/0216
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containing a non-catalytic steam reforming step
C01B 2203/0222
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containing a non-catalytic carbon dioxide reforming step
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C01B 2203/0227
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containing a catalytic reforming step
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the reforming step being a steam reforming step
C01B 2203/0238
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the reforming step being a carbon dioxide reforming step
C01B 2203/0244
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the reforming step being an autothermal reforming step, e.g. secondary reforming processes
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C01B 2203/025
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containing a partial oxidation step
C01B 2203/0255
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containing a non-catalytic partial oxidation step
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containing a catalytic partial oxidation step (CPO)
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C01B 2203/0266
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containing a decomposition step
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containing a non-catalytic decomposition step
C01B 2203/0277
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containing a catalytic decomposition step
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containing a CO-shift step, i.e. a water gas shift step
C01B 2203/0288
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containing two CO-shift steps
C01B 2203/0294
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containing three or more CO-shift steps
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containing a purification step for the hydrogen or the synthesis gas
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C01B 2203/0405
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Purification by membrane separation
C01B 2203/041
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In-situ membrane purification during hydrogen production
C01B 2203/0415
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Purification by absorption in liquids
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C01B 2203/042
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Purification by adsorption on solids
C01B 2203/0425
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In-situ adsorption process during hydrogen production
C01B 2203/043
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Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration
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C01B 2203/0435
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Catalytic purification
C01B 2203/044
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Selective oxidation of carbon monoxide
C01B 2203/0445
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Selective methanation
C01B 2203/045
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Purification by catalytic desulfurisation
C01B 2203/0455
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Purification by non-catalytic desulfurisation
C01B 2203/046
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Purification by cryogenic separation
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C01B 2203/0465
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Composition of the impurity
C01B 2203/047
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the impurety being carbon monoxide
C01B 2203/0475
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the impurety being carbon dioxide
C01B 2203/048
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the impurety being an organic compound
C01B 2203/0485
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the impurety being a sulfur compound
C01B 2203/049
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the impurety being carbon
C01B 2203/0495
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the impurety being water
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C01B 2203/06
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Integration with other chemical processes
C01B 2203/061
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Methanol production
C01B 2203/062
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Hydrocarbon production, e.g. Fischer-Tropsch process
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C01B 2203/063
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Refinery processes
C01B 2203/065
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using hydrotreating, e.g. hydrogenation, hydrodesulfurisation
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C01B 2203/066
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with fuel cells
C01B 2203/067
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the reforming process taking place in the fuel cell
C01B 2203/068
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Ammonia synthesis
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C01B 2203/08
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Methods of heating or cooling
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C01B 2203/0805
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Methods of heating the process for making hydrogen or synthesis gas
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C01B 2203/0811
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by combustion of fuel
C01B 2203/0816
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Heating by flames
C01B 2203/0822
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the fuel containing hydrogen
C01B 2203/0827
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at least part of the fuel being a recycle stream
C01B 2203/0833
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Heating by indirect heat exchange with hot fluids, other than combustion gases, product gases or non-combustive exothermic reaction product gases
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C01B 2203/0838
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by heat exchange with exothermic reactions, other than by combustion of fuel
C01B 2203/0844
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the non-combustive exothermic reaction being another reforming reaction as defined in groups C01B 2203/02 to C01B 2203/0294
C01B 2203/085
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by electric heating
C01B 2203/0855
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by electromagnetic heating
C01B 2203/0861
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by plasma
C01B 2203/0866
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by combination of different heating methods
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C01B 2203/0872
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Methods of cooling
C01B 2203/0877
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by direct injection of fluid
C01B 2203/0883
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by indirect heat exchange
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C01B 2203/0888
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by evaporation of a fluid
C01B 2203/0894
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Generation of steam
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C01B 2203/10
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Catalysts for performing the hydrogen forming reactions
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C01B 2203/1005
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Arrangement or shape of catalyst
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C01B 2203/1011
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Packed bed of catalytic structures, e.g. particles, packing elements
C01B 2203/1017
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characterised by the form of the structure
C01B 2203/1023
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Catalysts in the form of a monolith or honeycomb
C01B 2203/1029
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Catalysts in the form of a foam
C01B 2203/1035
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Catalyst coated on equipment surfaces, e.g. reactor walls
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C01B 2203/1041
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Composition of the catalyst
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Group VIII metal catalysts
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C01B 2203/1052
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Nickel or cobalt catalysts
C01B 2203/1058
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Nickel catalysts
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C01B 2203/1064
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Platinum group metal catalysts
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Platinum catalysts
C01B 2203/1076
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Copper or zinc-based catalysts
C01B 2203/1082
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Composition of support materials
C01B 2203/1088
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Non-supported catalysts
C01B 2203/1094
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Promotors or activators
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C01B 2203/12
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Feeding the process for making hydrogen or synthesis gas
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C01B 2203/1205
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Composition of the feed
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C01B 2203/1211
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Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
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C01B 2203/1217
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Alcohols
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Methanol
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Ethanol
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Hydrocarbons
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Natural gas or methane
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Higher hydrocarbons
C01B 2203/1252
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Cyclic or aromatic hydrocarbons
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Pre-treatment of the feed
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Catalytic pre-treatment of the feed
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Catalytic desulfurisation
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C01B 2203/1276
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Mixing of different feed components
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using static mixers
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Evaporation of one or more of the different feed components
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Evaporation by heat exchange with hot process stream
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Details of the flowsheet
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At least two reforming, decomposition or partial oxidation steps in parallel
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At least two reforming, decomposition or partial oxidation steps in series
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Three or more reforming, decomposition or partial oxidation steps in series
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At least two purification steps in parallel
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At least two purification steps in series
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Three or more purification steps in series
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involving a recycle stream to the feed of the process for making hydrogen or synthesis gas
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C01B 2203/16
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Controlling the process
C01B 2203/1604
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Starting up the process
C01B 2203/1609
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Shutting down the process
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Controlling the temperature
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Measuring the temperature
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Adjusting the temperature
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Controlling the pressure
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Measuring the pressure
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Adjusting the pressure
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Controlling the product
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Controlling the amount of the product
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C01B 2203/1652
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Measuring the amount of product
C01B 2203/1657
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the product being hydrogen
C01B 2203/1661
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the product being carbon monoxide
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the product being carbon dioxide
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Controlling the composition of the product
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Measuring the composition of the product
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Adjusting the composition of the product
C01B 2203/1685
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Control based on demand of downstream process
C01B 2203/169
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Controlling the feed
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Adjusting the feed of the combustion
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Aspect of integrated processes for the production of hydrogen or synthesis gas not covered by groups C01B 2203/02 to C01B 2203/1695
C01B 2203/82
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Several process steps of C01B 2203/02 to C01B 2203/08 integrated into a single apparatus
C01B 2203/84
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Energy production
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Carbon dioxide sequestration
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C01B 2204/00
Structure or properties of graphene
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Single layer graphene
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Specific amount of layers or specific thickness
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Graphene nanoribbons
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characterized by their width or by their aspect ratio
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Graphene characterized by its properties
C01B 2204/22
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Electronic properties
C01B 2204/24
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Thermal properties
C01B 2204/26
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Mechanical properties
C01B 2204/28
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Solid content in solvents
C01B 2204/30
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Purity
C01B 2204/32
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Size or surface area
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C01B 2210/00
Purification or separation of specific gases
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C01B 2210/0001
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Separation or purification processing
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C01B 2210/0003
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Chemical processing
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by oxidation
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by reduction
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by complexation
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C01B 2210/0009
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Physical processing
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C01B 2210/001
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by making use of membranes
C01B 2210/0012
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characterised by the membrane
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by adsorption in solids
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characterised by the adsorbent
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Carbon-based materials
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Zeolites
C01B 2210/002
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Other molecular sieve materials
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Temperature swing adsorption
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in getters
C01B 2210/0025
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by absorption in liquids
C01B 2210/0026
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Isotopes of the specific gas
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Separation of the specific gas from gas mixtures containing a minor amount of this specific gas
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C01B 2210/0029
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Obtaining noble gases
C01B 2210/0031
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Helium
C01B 2210/0032
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Neon
C01B 2210/0034
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Argon
C01B 2210/0035
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Krypton
C01B 2210/0037
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Xenon
C01B 2210/0039
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Radon
C01B 2210/004
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Separation of a mixture of noble gases
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Making ultrapure specific gas
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Impurity removed
C01B 2210/0045
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Oxygen
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Nitrogen
C01B 2210/0048
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Air
C01B 2210/005
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Carbon monoxide
C01B 2210/0051
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Carbon dioxide
C01B 2210/0053
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Hydrogen
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Hydrogen halides
C01B 2210/0056
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Hydrogen fluoride
C01B 2210/0057
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Hydrogen chloride
C01B 2210/0059
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Hydrogen bromide
C01B 2210/006
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Hydrogen iodide
C01B 2210/0062
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Water
C01B 2210/0064
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Hydrogen sulfide
C01B 2210/0065
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Ammonia
C01B 2210/0067
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Hydrogen cyanide
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C01B 2210/0068
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Organic compounds
C01B 2210/007
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Hydrocarbons
C01B 2210/0071
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Sulfur oxides
C01B 2210/0073
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Sulfur halides
C01B 2210/0075
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Nitrogen oxides
C01B 2210/0076
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Nitrogen halides
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C01B 2210/0078
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Noble gases
C01B 2210/0079
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Helium
C01B 2210/0081
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Neon
C01B 2210/0082
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Argon
C01B 2210/0084
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Krypton
C01B 2210/0085
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Xenon
C01B 2210/0087
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Radon
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C01B 2210/0089
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Peroxides
C01B 2210/009
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Hydrogen peroxide
C01B 2210/0092
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Ozone
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C01B 2210/0093
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Metals or metal compounds
C01B 2210/0095
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Metals
C01B 2210/0096
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Metal hydrides
C01B 2210/0098
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Other impurities
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Last Modified: 04/16/2013 4:31:16 PM