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IPC 7
C01C-C01C00320

SECTION C – CHEMISTRY; METALLURGY


C 01INORGANIC CHEMISTRY (processing powders of inorganic compounds preparatory to the manufacturing of ceramic products C04B 35/00; fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00; obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal C21B, C22B; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)


C 01 CAMMONIA; CYANOGEN; COMPOUNDS THEREOF (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; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00)


Note

 Therapeutic activity of compounds is further classified in subclass A61P. [7]



1/

00Ammonia; Compounds thereof

1/

02.Preparation or separation of ammonia

1/

04..Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B 3/02)

1/

08..Preparation of ammonia from nitrogenous organic substances

1/

10..Separation of ammonia from ammonia liquors, e.g. gas liquors

1/

12..Separation of ammonia from gases and vapours

1/

14...Saturators

1/

16.Halides of ammonium

1/

18.Nitrates of ammonium

1/

20.Sulfides; Polysulfides

1/

22.Sulfites of ammonium

1/

24.Sulfates of ammonium (C01C 1/14 takes precedence)

1/

242..Preparation from ammonia and sulfuric acid or sulfur trioxide  [2]

1/

244..Preparation by double decomposition of ammonium salts with sulfates  [2]

1/

245..Preparation from compounds containing nitrogen and sulfur  [2]

1/

246...from sulfur-containing ammonium compounds  [2]

1/

247....by oxidation with free oxygen  [2]

1/

248..Preventing coalescing or controlling form or size of crystals  [2]

1/

249..Deacidifying the crystals  [2]

1/

26.Carbonates or bicarbonates of ammonium

1/

28.Methods of preparing ammonium salts in general

Notes

(1)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 to C01G, according to the metal.

(2)Salts of polybasic acids with ammonium and a metal as cations are classified as though the ammonium were hydrogen.

(3)Complex ammine salts are classified in the relevant groups of subclasses C01D to C01G, according to the metal.


3/

00Cyanogen; Compounds thereof

3/

02.Preparation of hydrogen cyanide

3/

04..Separation from gases

3/

06.Stabilisation of hydrogen cyanide

3/

08.Simple or complex cyanides of metals

3/

10..Simple alkali metal cyanides  [3]

3/

11..Complex cyanides  [3]

3/

12..Simple or complex iron cyanides  [2]

3/

14.Cyanic acid; Salts thereof

3/

16.Cyanamide; Salts thereof (dicyandiamide C07C 279/28)

3/

18..Calcium cyanamide

3/

20.Thiocyanic acid; Salts thereof


  
 

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