1. CPC Sections
  2. CPC Section C
  3. CPC Class C01
  4. CPC Subclass C01C
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CPC
COOPERATIVE PATENT CLASSIFICATION
​
C01C
AMMONIA; CYANOGEN; COMPOUNDS THEREOF ({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; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; azides C01B 21/08; {compounds other than ammonia or cyanogen, containing nitrogen, non-metals and optionally metals C01B 21/082}; metal imides or amides C01B 21/092; nitrites C01B 21/50; {compounds of noble gases C01B 23/0005}; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00) [2020-05]
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
​
C01C 1/00
Ammonia; Compounds thereof {(C01C 3/08, C01C 3/14, C01C 3/16, C01C 3/20 take precedence)} [2016-05]
NOTE

  • Complex ammine salts, e.g. [Pd(NH3)4]Cl2, are { also} classified in the relevant groups of subclasses C01D - C01G, according to the metal
C01C 1/003
.
{Storage or handling of ammonia} [2013-01]
C01C 1/006
. .
{making use of solid ammonia storage materials, e.g. complex ammine salts} [2013-01]
C01C 1/02
.
Preparation, {purification} or separation of ammonia [2013-01]
C01C 1/022
. .
{Preparation of aqueous ammonia solutions, i.e. ammonia water} [2013-01]
C01C 1/024
. .
{Purification} [2013-01]
C01C 1/026
. .
{Preparation of ammonia from inorganic compounds} [2013-01]
C01C 1/028
. . .
{from ammonium sulfate or sulfite} [2013-01]
C01C 1/04
. .
Preparation of ammonia by synthesis {in the gas phase}(preparation or purification of gas mixtures for ammonia synthesis {C01B 3/025}) [2013-01]
C01C 1/0405
. . .
{from N2 and H2 in presence of a catalyst} [2013-01]
C01C 1/0411
. . . .
{characterised by the catalyst} [2013-01]
C01C 1/0417
. . . .
{characterised by the synthesis reactor, e.g. arrangement of catalyst beds and heat exchangers in the reactor (arrangement of several reactors C01C 1/0405; fixed-bed reactors in general B01J 8/02)} [2017-02]
C01C 1/0423
. . . . .
{Cold wall reactors} [2013-01]
C01C 1/0429
. . . . .
{Fluidized or moving bed reactors} [2013-01]
C01C 1/0435
. . . . .
{Horizontal reactors} [2013-01]
C01C 1/0441
. . . . .
{Reactors with the catalyst arranged in tubes} [2013-01]
C01C 1/0447
. . . .
{Apparatus other than synthesis reactors} [2013-01]
C01C 1/0452
. . . . .
{Heat exchangers} [2013-01]
C01C 1/0458
. . . .
{Separation of NH3 (during purge gas treatment C01C 1/0476)} [2013-01]
C01C 1/0464
. . . . .
{by absorption in liquids, e.g. water} [2013-01]
C01C 1/047
. . . . .
{by condensation} [2013-01]
C01C 1/0476
. . . .
{Purge gas treatment, e.g. for removal of inert gases or recovery of H2} [2013-01]
C01C 1/0482
. . . .
{Process control; Start-up or cooling-down procedures} [2013-01]
C01C 1/0488
. . . .
{Processes integrated with preparations of other compounds, e.g. methanol, urea or with processes for power generation} [2013-01]
C01C 1/0494
. . .
{using plasma or electric discharge} [2013-01]
C01C 1/08
. .
Preparation of ammonia from nitrogenous organic substances [2013-01]
C01C 1/083
. . .
{from molasses (treatment of molasses in general C13B 50/006)} [2015-07]
C01C 1/086
. . .
{from urea} [2013-01]
C01C 1/10
. .
Separation of ammonia from ammonia liquors, e.g. gas liquors {(as part of the ammonia synthesis process C01C 1/04)} [2013-01]
C01C 1/12
. .
Separation of ammonia from gases and vapours {(as part of the ammonia synthesis process C01C 1/04)} [2013-01]
C01C 1/14
. . .
Saturators [2013-01]
C01C 1/16
.
Halides of ammonium [2013-01]
C01C 1/162
. .
{Ammonium fluoride} [2013-01]
C01C 1/164
. .
{Ammonium chloride} [2013-01]
C01C 1/166
. .
{Ammonium bromide} [2013-01]
C01C 1/168
. .
{Ammonium iodide} [2013-01]
C01C 1/18
.
Nitrates of ammonium [2013-01]
C01C 1/185
. .
{Preparation} [2013-01]
C01C 1/20
.
Sulfides; Polysulfides [2013-01]
C01C 1/22
.
Sulfites of ammonium [2013-01]
C01C 1/24
.
Sulfates of ammonium (C01C 1/14 takes precedence) [2013-01]
C01C 1/242
. .
Preparation from ammonia and sulfuric acid or sulfur trioxide [2013-01]
C01C 1/244
. .
Preparation by double decomposition of ammonium salts with sulfates [2013-01]
C01C 1/245
. .
Preparation from compounds containing nitrogen and sulfur [2013-01]
C01C 1/246
. . .
from sulfur-containing ammonium compounds [2013-01]
C01C 1/247
. . . .
by oxidation with free oxygen [2013-01]
C01C 1/248
. .
Preventing coalescing or controlling form or size of the crystals [2013-01]
C01C 1/249
. .
Deacidifying {or drying} the crystals [2013-01]
C01C 1/26
.
Carbonates or bicarbonates of ammonium [2013-01]
​
C01C 1/28
.
Methods of preparing ammonium salts in general [2016-05]
NOTES

  • This group does not cover ammonium salts of complex acids (other than complex cyanides) containing a metal in the anion, which are covered by the relevant groups of subclasses C01D - C01G, according to the metal.
  • Salts of polybasic acids with ammonium and a metal as cations are classified as though the ammonium were hydrogen.
C01C 3/00
Cyanogen; Compounds thereof [2013-01]
C01C 3/001
.
{Preparation by decomposing nitrogen-containing organic compounds, e.g. molasse waste or urea (by distillation of carbamates C01C 3/02, C01C 3/08, C01C 3/14, C01C 3/16; by decomposing formamide or ammonium formate C01C 3/0204)} [2013-01]
C01C 3/002
.
{Synthesis of metal cyanides or metal cyanamides from elementary nitrogen and carbides} [2013-01]
C01C 3/003
.
{Cyanogen} [2013-01]
C01C 3/004
.
{Halogenides of cyanogen} [2013-01]
C01C 3/005
.
{Thiocyanogen} [2013-01]
C01C 3/006
.
{Sulfurdicyanide} [2013-01]
C01C 3/007
.
{Ammonium cyanide} [2013-01]
C01C 3/008
.
{Cyanazide} [2013-01]
C01C 3/02
.
Preparation, {separation or purification} of hydrogen cyanide {(C01C 3/001 takes precedence)} [2013-01]
C01C 3/0204
. .
{from formamide or from ammonium formate} [2013-01]
C01C 3/0208
. .
{Preparation in gaseous phase} [2013-01]
C01C 3/0212
. . .
{from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process} [2013-01]
C01C 3/0216
. . . .
{characterised by the catalyst used} [2013-01]
C01C 3/022
. . . .
{Apparatus therefor} [2013-01]
C01C 3/0225
. . . . .
{characterised by the synthesis reactor} [2013-01]
C01C 3/0229
. . .
{from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process} [2013-01]
C01C 3/0233
. . . .
{making use of fluidised beds, e.g. the Shawinigan-process} [2013-01]
C01C 3/0237
. . .
{from carbon monoxide and ammonia} [2013-01]
C01C 3/0241
. . .
{from alcohols or aldehydes} [2013-01]
C01C 3/0245
. . .
{from organic nitriles, e.g. acetonitrile} [2013-01]
C01C 3/025
. . .
{by using a plasma} [2013-01]
C01C 3/0254
. .
{from cyanates or from thiocyanates} [2013-01]
C01C 3/0258
. .
{from cyanamides or derivatives thereof} [2013-01]
C01C 3/0262
. .
{from cyanides} [2013-01]
C01C 3/0266
. . .
{from simple alkali or alkaline earth metal cyanides} [2013-01]
C01C 3/027
. . . .
{Alkali metal cyanides} [2013-01]
C01C 3/0275
. . . .
{Alkaline earth metal cyanides} [2013-01]
C01C 3/0279
. . .
{from ammonium cyanide} [2013-01]
C01C 3/0283
. . .
{from simple or complex cyanides of the noble metals} [2013-01]
C01C 3/0287
. . .
{from simple or complex cyanides of other transition metals, e.g. from iron cyanides} [2013-01]
C01C 3/0291
. . .
{from simple or complex cyanides of other metals} [2013-01]
C01C 3/0295
. .
{Purification} [2013-01]
C01C 3/04
. .
Separation from gases [2013-01]
C01C 3/06
.
Stabilisation of hydrogen cyanide [2013-01]
C01C 3/08
.
Simple or complex cyanides of metals {(C01C 3/001, C01C 3/002 take precedence)} [2013-01]
C01C 3/10
. .
Simple alkali metal cyanides [2013-01]
C01C 3/11
. .
Complex cyanides [2013-01]
C01C 3/12
. .
Simple or complex iron cyanides [2013-01]
C01C 3/14
.
Cyanic {or isocyanic} acid; Salts thereof {(C01C 3/001 takes precedence)} [2013-01]
C01C 3/145
. .
{Isocyanic acid; Salts thereof} [2013-01]
C01C 3/16
.
Cyanamide; Salts thereof ({C01C 3/001, C01C 3/002 takes precedence}; dicyandiamide C07C 279/28) [2013-01]
C01C 3/18
. .
Calcium cyanamide [2013-01]
C01C 3/20
.
Thiocyanic acid; Salts thereof {(C01C 3/001 takes precedence)} [2013-01]