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IPC 7
  C - C01B 13/36  
C01B01500-C01B02150
  C01B 23/00 - C01B 33/46  

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 BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF


15/

00Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides

15/

01.Hydrogen peroxide  [3]

15/

013..Separation; Purification; Concentration  [3]

15/

017...Anhydrous hydrogen peroxide; Anhydrous solutions or gaseous mixtures containing hydrogen peroxide  [3]

15/

022..Preparation from organic compounds  [2]

15/

023...by the alkyl-anthraquinone process  [3]

15/

024...from hydrocarbons  [3]

15/

026...from alcohols  [3]

15/

027..Preparation from water  [3]

15/

029..Preparation from hydrogen and oxygen  [3]

15/

03..Preparation from inorganic peroxy-compounds, e.g. from peroxysulfates  [3]

15/

032...from metal peroxides  [3]

15/

037..Stabilisation by additives  [3]

15/

04.Metal peroxides or peroxyhydrates thereof; Superoxides; Ozonides  [3]

15/

043..of alkali metals, alkaline earth metals or of magnesium  [2,3]

15/

047..of heavy metals  [2,3]

15/

055.Peroxyhydrates (C01B 15/04 takes precedence); Peroxyacids or salts thereof  [3]

15/

06..containing sulfur  [3]

15/

08...Peroxysulfates  [3]

15/

10..containing carbon  [3]

15/

12..containing boron  [3]

15/

14..containing silicon  [3]

15/

16..containing phosphorus  [3]



17/

00Sulfur; Compounds thereof

17/

02.Preparation of sulfur; Purification

17/

027..Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses; Purification  [3]

17/

033...using a liquid extractant  [3]

17/

04..from gaseous sulfur compounds including gaseous sulfides

17/

05...by wet processes  [3]

17/

06..from non-gaseous sulfides or materials containing such sulfides, e.g. ores

17/

10..Finely-divided sulfur, e.g. sublimed sulfur, flowers of sulfur

17/

12..Insoluble sulfur (mu-sulfur)

17/

16.Hydrogen sulfides

17/

18..Hydrogen polysulfides

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)

17/

22.Alkali metal sulfides or polysulfides

17/

24..Preparation by reduction

17/

26...with carbon

17/

28...with reducing gases

17/

30..Preparation from sodium or potassium amalgam with sulfur or sulfides

17/

32..Hydrosulfides of sodium or potassium

17/

34..Polysulfides of sodium or potassium

17/

36..Purification

17/

38..Dehydration

17/

40..Making shaped products, e.g. granules

17/

42.Sulfides or polysulfides of magnesium, calcium, strontium, or barium

17/

43..from oxides or hydroxides with sulfur or hydrogen sulfide

17/

44..by reduction of sulfates

17/

45.Compounds containing sulfur and halogen, with or without oxygen

17/

46.Compounds containing sulfur, halogen, hydrogen, and oxygen

17/

48.Sulfur dioxide; Sulfurous acid

17/

50..Preparation of sulfur dioxide

17/

52...by roasting sulfides (C22B 1/00 takes precedence)

17/

54...by burning elemental sulfur

17/

56...Separation; Purification

17/

58...Recovery of sulfur dioxide from acid tar or the like

17/

60...Isolation of sulfur dioxide from gases

17/

62.Methods of preparing sulfites in general (particular individual sulfites, see the relevant groups of subclasses C01B to C01G, according to the cation)

17/

64.Thiosulfates; Dithionites; Polythionates

17/

66..Dithionites

17/

69.Sulfur trioxide; Sulfuric acid  [3]

17/

70..Stabilisation of gamma-form sulfur trioxide

17/

74..Preparation  [3]

17/

76...by contact processes

17/

765....Multi-stage SO3-conversion  [3]

17/

77....Fluidised-bed processes  [3]

17/

775....Liquid phase contacting processes or wet catalysis processes  [3]

17/

78....characterised by the catalyst used

17/

79.....containing vanadium  [3]

17/

80....Apparatus

17/

82...of sulfuric acid using a nitrogen oxide process

17/

84....Chamber process

17/

86....Tower process

17/

88..Concentration of sulfuric acid

17/

90..Separation; Purification

17/

92...Recovery from acid tar or the like

17/

94...Recovery from nitration acids

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)

17/

98.Other compounds containing sulfur and oxygen (persulfuric acids C01B 15/06; persulfates C01B 15/08)


19/

00Selenium; Tellurium; Compounds thereof (phosphorus compounds C01B 25/14)

19/

02.Elemental selenium or tellurium  [3]

19/

04.Binary compounds  [3]


21/

00Nitrogen; Compounds thereof

21/

02.Preparation of nitrogen (from ammonia C01B 3/04)

21/

04.Purification or separation of nitrogen (by liquefying F25J)

21/

06.Binary compounds of nitrogen with metals, with silicon, or with boron (azides C01B 21/08)

21/

064..with boron  [3]

21/

068..with silicon  [3]

21/

072..with aluminium  [3]

21/

076..with titanium or zirconium  [3]

21/

08.Hydrazoic acid; Azides; Halogen azides

21/

082.Compounds containing nitrogen and non-metals (C01B 21/06, C01B 21/08 take precedence)  [3]

21/

083..containing one or more halogen atoms  [3]

21/

084...containing also one or more oxygen atoms, e.g. nitrosyl halides  [3]

21/

086..containing one or more sulfur atoms  [3]

21/

087..containing one or more hydrogen atoms  [3]

21/

088...containing also one or more halogen atoms  [3]

21/

09....Halogeno-amines, e.g. chloramine  [3]

21/

092...containing also one or more metal atoms  [3]

21/

093...containing also one or more sulfur atoms  [3]

21/

094....Nitrosyl containing acids  [3]

21/

096....Amidosulfonic acid; Salts thereof  [3]

21/

097..containing phosphorus atoms  [3]

21/

098...Phosphonitrilic dihalides; Polymers thereof  [3]

21/

12..Carbamic acid; Salts thereof

21/

14..Hydroxylamine; Salts thereof

21/

16..Hydrazine; Salts thereof

21/

20.Nitrogen oxides; Oxyacids of nitrogen; Salts thereof

21/

22..Nitrous oxide (N2O)

21/

24..Nitric oxide (NO)

21/

26...Preparation by catalytic oxidation of ammonia

21/

28....Apparatus

21/

30...Preparation by oxidation of nitrogen

21/

32....Apparatus

21/

34..Nitrogen trioxide (N2O3)

21/

36..Nitrogen dioxide (NO2, N2O4) (C01B 21/26, C01B 21/30 take precedence)

21/

38..Nitric acid

21/

40...Preparation by absorption of oxides of nitrogen

21/

42...Preparation from nitrates

21/

44...Concentration

21/

46...Purification; Separation

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)

21/

50..Nitrous acid; Salts thereof

  C - C01B 13/36    C01B 23/00 - C01B 33/46  
 

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