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Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised
Search Symbol
CPC
COOPERATIVE PATENT CLASSIFICATION
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COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides
{
monoborane, diborane or addition complexes thereof
}
C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulfides C01B 17/22; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; binary compounds of nitrogen with metals C01B 21/06; azides C01B 21/08;
{
compounds other than ammonia and cyanogen, containing nitrogen and other non-metals C01B 21/082
}
; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 21/50;
{
compounds of noble gases C01B 23/0005
}
; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; carbides C01B 31/30; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00; cyanides C01C 3/08; salts of cyanic acid C01C 3/14; salts of cyanamide C01C 3/16; thiocyanates C01C 3/20)
[2013‑01]
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Oxides or hydroxides of sodium, potassium or alkali metals in general [2013‑01]
C01D 1/02
.
Oxides [2013‑01]
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C01D 1/04
.
Hydroxides [2013‑01]
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C01D 1/20
. .
Preparation by reacting oxides or hydroxides with alkali metal salts [2013‑01]
C01D 1/22
. . .
with carbonates or bicarbonates [2013‑01]
C01D 1/24
. . .
from or via fluorides or silico-fluorides [2013‑01]
C01D 1/26
. .
Preparation from or via cyano compounds, e.g. cyanides, cyanamides [2013‑01]
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C01D 1/28
. .
Purification; Separation [2013‑01]
C01D 1/30
. . .
by crystallisation [2013‑01]
C01D 1/32
. . .
by absorption or precipitation [2013‑01]
C01D 1/34
. . .
with selective solvents [2013‑01]
C01D 1/36
. . .
by oxidation [2013‑01]
C01D 1/38
. . .
by dialysis [2013‑01]
C01D 1/40
. . .
by electrolysis [2013‑01]
C01D 1/42
. .
Concentration; Dehydration [2013‑01]
C01D 1/44
. .
Preparation in the form of granules, pieces, or other shaped products [2013‑01]
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Halides of sodium, potassium or alkali metals in general
{
(halides in general C01B 9/00)
}
[2013‑01]
C01D 3/02
.
Fluorides [2013‑01]
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C01D 3/04
.
Chlorides [2013‑01]
C01D 3/06
. .
Preparation by working up brines; seawater or spent lyes [2013‑01]
C01D 3/08
. .
Preparation by working up natural or industrial salt mixtures or siliceous minerals [2013‑01]
C01D 3/10
.
Bromides [2013‑01]
C01D 3/12
.
Iodides [2013‑01]
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C01D 3/14
.
Purification [2013‑01]
C01D 3/145
. .
{
by solid ion-exchangers or solid chelating agents
}
[2013‑01]
C01D 3/16
. .
by precipitation or adsorption
{
(C01D 3/145 takes precedence)
}
[2013‑01]
C01D 3/18
. .
with selective solvents [2013‑01]
C01D 3/20
. .
by melting [2013‑01]
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C01D 3/22
.
Preparation in the form of granules, pieces, or other shaped products [2013‑01]
C01D 3/24
. .
Influencing the crystallisation process [2013‑01]
C01D 3/26
.
Preventing the absorption of moisture or caking of the crystals [2013‑01]
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Sulfates or sulfites of sodium, potassium or alkali metals in general
{
(sulfites in general C01B 17/62)
}
[2013‑01]
C01D 5/002
.
{
Preventing the absorption of moisture or caking of the crystals by additives
}
[2013‑01]
C01D 5/004
.
{
Preparation in the form of granules, pieces or other shaped products
}
[2013‑01]
C01D 5/006
.
{
Recovery of sodium sulfate from coagulation baths for the spinning of viscose
}
[2013‑01]
C01D 5/008
.
{
Preparation of potassium sulfate from alunite
}
[2013‑01]
C01D 5/02
.
Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates [2013‑01]
C01D 5/04
.
Preparation of sulfates with the aid of sulfurous acid or sulfites, e.g. Hargreaves process
{
(pyrosulfites or metabisulfites C01D 5/145)
}
[2013‑01]
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C01D 5/06
.
Preparation of sulfates by double decomposition [2013‑01]
C01D 5/08
. .
with each other or with ammonium sulfate [2013‑01]
C01D 5/10
. .
with sulfates of magnesium, calcium, strontium, or barium [2013‑01]
C01D 5/12
.
Preparation of double sulfates of magnesium with sodium or potassium [2013‑01]
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C01D 5/14
.
Preparation of sulfites (C01D 5/04 takes precedence) [2013‑01]
C01D 5/145
. .
{
Pyrosulfites or metabisulfites
}
[2013‑01]
C01D 5/16
.
Purification
{
(C01D 5/145 takes precedence)
}
[2013‑01]
C01D 5/18
.
Dehydration
{
(C01D 5/145 takes precedence)
}
[2013‑01]
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Carbonates of sodium, potassium or alkali metals in general [2013‑01]
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C01D 7/02
.
Preparation by double decomposition [2013‑01]
C01D 7/04
. .
with a fluoride or silico-fluoride (C01D 1/24 takes precedence) [2013‑01]
C01D 7/06
.
Preparation via sodium or potassium magnesium carbonate [2013‑01]
C01D 7/07
.
Preparation from the hydroxides [2013‑01]
C01D 7/08
.
Preparation from or via cyano compounds of sodium or potassium (C01D 1/26 takes precedence) [2013‑01]
C01D 7/10
.
Preparation of bicarbonates from carbonates (ammonia soda process C01D 7/18) [2013‑01]
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C01D 7/12
.
Preparation of carbonates from bicarbonates
{
or bicarbonate-containing product
}
[2013‑01]
C01D 7/123
. .
{
by thermal decomposition of solids in the absence of a liquid medium
}
[2013‑01]
C01D 7/126
. .
{
Multi-step processes, e.g. from trona to soda ash
}
[2013‑01]
C01D 7/14
.
Preparation of sesquicarbonates [2013‑01]
C01D 7/16
.
Preparation from compounds of sodium or potassium with amines and carbon dioxide [2013‑01]
C01D 7/18
.
Preparation by the ammonia-soda process
{
(C01D 7/12 takes precedence)
}
[2013‑01]
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C01D 7/22
.
Purification [2013‑01]
C01D 7/24
. .
Crystallisation [2013‑01]
C01D 7/26
. .
by precipitation or adsorption [2013‑01]
C01D 7/28
. .
with selective solvents [2013‑01]
C01D 7/30
. .
by oxidation [2013‑01]
C01D 7/32
. .
by dialysis [2013‑01]
C01D 7/34
. .
by electrolysis [2013‑01]
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C01D 7/35
.
Varying the content of water of crystallisation or the specific gravity
{
(calcination B01J 6/00, F27B)
}
[2013‑01]
C01D 7/37
. .
Densifying sodium carbonate [2013‑01]
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C01D 7/38
.
Preparation in the form of granules, pieces or other shaped products [2013‑01]
C01D 7/40
. .
influencing the crystallisation process [2013‑01]
C01D 7/42
.
Preventing the absorption of moisture or caking [2013‑01]
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Nitrates of sodium, potassium or alkali metals in general
{
(preparation as fertilizers or of fertilizers containing them C05D 5/00)
}
[2013‑01]
C01D 9/02
.
Preparation by working-up natural salt mixtures [2013‑01]
C01D 9/04
.
Preparation with liquid nitric acid [2013‑01]
C01D 9/06
.
Preparation with gaseous nitric acid or nitrogen oxides [2013‑01]
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C01D 9/08
.
Preparation by double decomposition [2013‑01]
C01D 9/10
. .
with ammonium nitrate [2013‑01]
C01D 9/12
. .
with nitrates or magnesium, calcium, strontium, or barium [2013‑01]
C01D 9/14
. .
of salts of potassium with sodium nitrate [2013‑01]
C01D 9/16
.
Purification [2013‑01]
C01D 9/18
.
Preparation in the form of shaped products, e.g. granules [2013‑01]
C01D 9/20
.
Preventing the absorption of moisture or caking [2013‑01]
C01D 13/00
Compounds of sodium or potassium not provided for elsewhere [2013‑01]
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Lithium compounds [2013‑01]
C01D 15/005
.
{
Lithium hexafluorophosphate
}
[2013‑01]
C01D 15/02
.
Oxides; Hydroxides [2013‑01]
C01D 15/04
.
Halides [2013‑01]
C01D 15/06
.
Sulfates; Sulfites [2013‑01]
C01D 15/08
.
Carbonates; Bicarbonates [2013‑01]
C01D 15/10
.
Nitrates [2013‑01]
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Rubidium, caesium or francium compounds [2013‑01]
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C01D 17/003
.
{
Compounds of alkali metals
}
[2013‑01]
C01D 17/006
. .
{
Preparation of potassium compounds comprising precipitating potassium ions by an organic reagent or extracting them by a liquid organic phase
}
[2013‑01]
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013