C
SECTION C — CHEMISTRY AND METALLURGY
  
CHEMISTRY
 C01
INORGANIC CHEMISTRY (obtaining metal compounds by metallurgical processes C21B, C22B)
 C01B
NON-METALLIC ELEMENTS; METALLOIDS AND THEIR COMPOUNDS, EXCEPT THOSE COVERED BY C01C (arsenic, antimony C22B)
 C01B

Note(s)

  1. Within this sub-class in the absence of a reference to the contrary, a compound is classified in C01B the last appropriate place.
  2. Group C01B 21/10 takes precedence over the other groups of this sub-class
 C01B 1/00 - 
C01B 6/00
Hydrogen; Hydrides; Water; Synthesis gas from hydrocarbons
 C01B 1/00
Hydrogen
 C01B 1/02
·  Preparation of hydrogen
 C01B 1/03
·  ·  by decomposition or partial oxidation of inorganic compounds
 C01B 1/04
·  ·  ·  by decomposition of ammonia
 C01B 1/05
·  ·  by reaction of compounds containing electropositively-bound hydrogen, e.g. water, acids, bases, alcohols, ammonia, with inorganic reducing agents (electrolysis of water C01B 13/04)
 C01B 1/07
·  ·  ·  with metals
 C01B 1/08
·  ·  ·  by reaction of steam with inorganic reducing agents, e.g. metals
 C01B 1/09
·  ·  ·  ·  with moving solid inorganic reducing agents
 C01B 1/11
·  ·  ·  by reaction of metal hydroxides with carbon monoxide
 C01B 1/13
·  ·  by decomposition of gaseous or liquid organic compounds (C10G takes precedence)
 C01B 1/16
·  ·  ·  of hydrocarbons
 C01B 1/18
·  ·  ·  ·  catalytic (C01B 1/20 takes precedence)
 C01B 1/20
·  ·  ·  ·  with moving solid particles, e.g. of catalyst
 C01B 1/26
·  Separation; Purification (by liquefying F25J)
 C01B 1/27
·  ·  by diffusion
 C01B 1/28
·  ·  by chemical means
 C01B 1/30
·  ·  ·  catalytic
 C01B 1/32
·  ·  by adsorption and/or absorption
 C01B 1/33
·  ·  ·  by washing; Regeneration of the washing liquids
 C01B 1/35
·  ·  ·  by solids; Re-activation of used adsorbents
 C01B 2/00
Gaseous mixtures containing a substantial proportion of hydrogen together with nitrogen and/or oxides of carbon; Similar mixtures, also containing insignificant proportions of hydrocarbon (production of water gas and synthesis gas from solid carbonaceous material C10J)
 C01B 2/02
·  Production of gaseous mixtures containing a substantial proportion of hydrogen together with nitrogen or oxides of carbon
 C01B 2/04
·  ·  by decomposition of ammonia
 C01B 2/06
·  ·  by reaction of steam with carbon monoxide
 C01B 2/08
·  ·  ·  Handling of heat and steam, also in connection with purification by washing (purification of hydrogen C01B 1/26)
 C01B 2/10
·  ·  ·  Use of catalysts
 C01B 2/12
·  ·  ·  Use of moving solid particles, e.g. of catalyst
 C01B 2/14
·  by reaction of hydrocarbons with gasifying agents, e.g. water, carbon dioxide, air
 C01B 2/16
·  ·  catalytic (C01B 2/18 takes precedence)
 C01B 2/18
·  ·  with moving solid particles, e.g. of catalyst
 C01B 2/20
·  ·  ·  according to the "moving bed" type
 C01B 2/22
·  ·  ·  according to the "fluidised bed" type
 C01B 2/24
·  ·  using solid oxidising agent as the gasifying agent (C01B 2/18-C01B 2/22 take precedence)
 C01B 2/26
·  ·  followed by a reaction covered by group C01B 2/06
 C01B 2/28
·  by decomposition of gaseous liquid organic compounds (C10G takes precedence; coking liquid carbonaceous materials C10B 55/00)
 C01B 2/30
·  Preparation or purification of gas mixtures for the synthesis of ammonia
 C01B 4/00
Hydrogen isotopes; Inorganic compounds thereof, and their preparation by isotope exchange, e.g. NH3+D2NH2+HD (deuterides or tritiides of metal or boron C01B 6/00; heavy water C01B 5/02)
 C01B 4/02
·  Concentration by separation from mixtures with hydrogen or hydrogen compounds
 C01B 4/04
·  ·  by fractional distillation, condensation or liquefaction
 C01B 4/06
·  ·  by isotope exchange, e.g. phase inversion
 C01B 4/08
·  ·  ·  dual temperature exchange
 C01B 4/10
·  ·  by electrolytic methods
 C01B 4/12
·  ·  by adsorption or diffusion
 C01B 4/14
·  ·  by combinations of methods covered by more than one of groups C01B 4/02-C01B 4/12
 C01B 5/00
Water
 C01B 5/02
·  Heavy water; Preparation by chemical reaction of hydrogen isotopes or their compounds, e.g. 4ND3+7O24NO2+6D2O, 2D2 +O22D2O
 C01B 6/00
Hydrides, deuterides, tritiides of metals or boron; Addition complexes thereof
 C01B 6/02
·  Hydrides of transition element
 C01B 6/04
·  Hydrides of a metal from group Ia or IIa of the Periodic System
 C01B 6/06
·  Hydrides of aluminium, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, bismuth or polonium; Monoborane; Diborane; Addition complexes thereof
 C01B 6/08
·  Hydrides of boron
 C01B 6/10
·  ·  Diborane
 C01B 6/12
·  ·  Metal boranates
 C01B 6/14
·  ·  ·  of alkali metals
 C01B 6/16
·  ·  ·  of alkaline earth metals
 C01B 6/18
·  ·  Non-metallic complexes of borane or diborane, e.g. with phosphine, with arsine
 C01B 6/20
·  ·  ·  containing nitrogen
 C01B 6/22
·  ·  Complex compounds of higher hydrides of boron
 C01B 6/24
·  Complex hydrides containing at least two metals, e.g. Li(AlH4)
 C01B 6/26
·  ·  Preparation from the metal with the highest valency or from its oxides and/or salts of its oxyacids
 C01B 6/28
·  ·  ·  Preparation of aluminium compounds
 C01B 6/30
·  ·  Preparation from other compounds of the metal with the highest valency
 C01B 6/32
·  ·  ·  Preparation of aluminium compounds
 C01B 6/34
·  Purification; Stabilisation
 C01B 7/00 - 
C01B 11/00
Halogens; Compounds thereof
 C01B 7/00
Halogens; Halogen acids (oxyacids C01B 11/00)
 C01B 7/02
·  Chlorine
 C01B 7/04
·  ·  Preparation from HCl
 C01B 7/06
·  ·  Preparation by electrolysis (C01B 11/26 takes precedence)
 C01B 7/08
·  HCl
 C01B 7/10
·  Bromine
 C01B 7/12
·  HBr
 C01B 7/14
·  Iodine
 C01B 7/16
·  ·  Preparation from seaweed
 C01B 7/18
·  Hydrogen iodine
 C01B 7/20
·  Fluorine
 C01B 7/22
·  Hydrogen fluoride
 C01B 7/24
·  Inter-halogen compounds
 C01B 9/00
General methods of preparing halides (particular individual halides, see the relevant groups in C01B-C01G according to the element combined with the halogen)
 C01B 9/02
·  chlorides
 C01B 9/04
·  bromides
 C01B 9/06
·  iodides
 C01B 9/08
·  fluorides
 C01B 11/00
Oxides or oxyacids of halogens; Salts thereof
 C01B 11/02
·  Oxides of chlorine
 C01B 11/04
·  Hypochlorous acid
 C01B 11/06
·  ·  Hypochlorites, e.g. chlorinated lime
 C01B 11/08
·  Chlorous acid
 C01B 11/10
·  ·  Chlorites
 C01B 11/12
·  Chloric acid
 C01B 11/14
·  ·  Chlorates
 C01B 11/16
·  Perchloric acid
 C01B 11/18
·  ·  Perchlorates
 C01B 11/20
·  Oxygen compounds of bromine
 C01B 11/22
·  Oxygen compounds of iodine
 C01B 11/24
·  Oxygen compounds of fluorine
 C01B 11/26
·  Preparation by electrolysis
 C01B 13/00 - 
C01B 15/00
Oxygen; Oxides in general; Per-compounds
 C01B 13/00
Oxygen; Ozone
 C01B 13/02
·  Preparation of oxygen (by liquefying F25J)
 C01B 13/04
·  ·  by electrolysis of water
 C01B 13/06
·  ·  ·  Apparatus (electrolytic apparatus in genera B01K 3/00)
 C01B 13/08
·  ·  from air with the aid of metal oxides, e.g. barium oxide, manganese oxide
 C01B 13/10
·  Preparation of ozone
 C01B 13/12
·  ·  Apparatus
 C01B 13/14
·  Methods for preparing oxides or hydroxides in general (particular individual oxides or hydroxides, see the relevant groups in C01B-C01G, according to the element combined with the oxygen or hydroxyl)
 C01B 15/00
Peroxides; Peracids; Salts thereof (peroxyacids of halogens, salts thereof C01B 11/00)
 C01B 15/02
·  Hydrogen peroxide
 C01B 15/04
·  Metal peroxides
 C01B 15/06
·  Persulphuric acids (H2SO5, H2S2O8)
 C01B 15/08
·  Persulphates
 C01B 15/10
·  Percarbonates
 C01B 15/12
·  Perborates
 C01B 15/14
·  Persilicates
 C01B 15/16
·  Perphosphates
 C01B 17/00
Sulphur; Compounds thereof
 C01B 17/02
·  Preparation of sulphur; Purification
 C01B 17/04
·  ·  from gaseous sulphur compounds
 C01B 17/06
·  ·  from sulphides and/or material containing sulphides, e.g. ores
 C01B 17/08
·  ·  Recovery of sulphur from elemental sulphur-containing material, e.g. luxmasses
 C01B 17/10
·  ·  Finely-divided sulphur
 C01B 17/12
·  ·  Insoluble sulphur (-sulphur)
 C01B 17/14
·  ·  Purification
 C01B 17/16
·  Hydrogen sulphides
 C01B 17/18
·  ·  Hydrogen polysulphides
 C01B 17/20
·  Methods for preparing sulphides or polysulphides, in general (ammonium sulphides or polysulphides C01C; sulphides or polysulphides of metals, other than alkali metals, magnesium, calcium, strontium, and barium, see the relevant groups in C01F or C01G according to the metal)
 C01B 17/22
·  Alkali metal sulphides or polysulphides
 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 sulphur or sulphides
 C01B 17/32
·  ·  Hydrosulphides of sodium and/or potassium
 C01B 17/34
·  ·  Polysulphides of sodium and/or potassium
 C01B 17/36
·  ·  Purification
 C01B 17/38
·  ·  Dehydration
 C01B 17/40
·  ·  Making shaped products, e.g. granules
 C01B 17/42
·  Sulphides or polysulphides of magnesium, calcium, strontium, or barium
 C01B 17/43
·  ·  from oxides or hydroxides with sulphur or hydrogen sulphide
 C01B 17/44
·  ·  by reduction of sulphates
 C01B 17/45
·  Compounds containing sulphur and halogen, with or without oxygen
 C01B 17/46
·  Compounds containing sulphur, halogen, hydrogen, and oxygen
 C01B 17/48
·  Sulphur dioxide; Sulphurous acid
 C01B 17/50
·  ·  Preparation of sulphur dioxide
 C01B 17/52
·  ·  ·  by roasting sulphides (C21B 1/00, C22B 1/00 take precedence)
 C01B 17/54
·  ·  ·  by burning elemental sulphur
 C01B 17/56
·  ·  ·  Separation; Purification
 C01B 17/58
·  ·  ·  Recovery of sulphur dioxide from acid tar and the like
 C01B 17/60
·  ·  ·  Isolation of sulphur dioxide from gases
 C01B 17/62
·  Methods of preparing sulphites in general (particular individual sulphites, see the relevant groups in C01B-C01G according to the cation)
 C01B 17/64
·  Thiosulphates; Hyposulphites; Polythionates
 C01B 17/66
·  ·  Hyposulphites
 C01B 17/68
·  Sulphur trioxide (C01B 17/76 takes precedence)
 C01B 17/70
·  ·  Stabilisation of the gamma-form
 C01B 17/72
·  Sulphuric acid
 C01B 17/74
·  ·  Preparation
 C01B 17/76
·  ·  ·  Contact process
 C01B 17/78
·  ·  ·  ·  Use of special catalysts
 C01B 17/80
·  ·  ·  ·  Apparatus
 C01B 17/82
·  ·  ·  Nitrogen oxide processes
 C01B 17/84
·  ·  ·  ·  Chamber process
 C01B 17/86
·  ·  ·  ·  Tower processes
 C01B 17/88
·  ·  Concentration
 C01B 17/90
·  ·  Separation; Purification
 C01B 17/92
·  ·  ·  Recovery from acid tar and the like
 C01B 17/94
·  ·  ·  Recovery from nitration acids
 C01B 17/96
·  Methods for the preparation of sulphates in general (particular individual sulphates, see the relevant groups in C01B-C01G according to the cation)
 C01B 17/98
·  Other compounds containing sulphur and oxygen (persulphuric acids C01B 15/06; persulphates C01B 15/08)
 C01B 19/00
Selenium; Tellurium; Compounds thereof (phosphorus compounds C01B 25/14)
 C01B 21/00
Nitrogen; Compounds thereof
 C01B 21/02
·  Preparation of nitrogen (from ammonia C01B 1/04)
 C01B 21/04
·  Purification and/or separation of nitrogen (by liquefying F25J)
 C01B 21/06
·  Nitrides (hard alloys C22)
 C01B 21/08
·  Hydrazoic acid; Azides
 C01B 21/10
·  Imido and amido compounds (takes precedence over other groups of C01B; cyanamide C01C)
 C01B 21/12
·  ·  Carbamic acid; Inorganic salts thereof (organic salts C07C 125/02)
 C01B 21/14
·  ·  Hydroxylamine; Salts thereof
 C01B 21/16
·  ·  Hydrazine; Salts thereof
 C01B 21/18
·  ·  containing halogen, e.g. chloramine
 C01B 21/20
·  Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
 C01B 21/22
·  ·  Nitrous oxide (N2O)
 C01B 21/24
·  ·  Nitric oxide (NO)
 C01B 21/26
·  ·  ·  Preparation by catalytic oxidation of ammonia
 C01B 21/28
·  ·  ·  ·  Apparatus
 C01B 21/30
·  ·  ·  Preparation by oxidation of nitrogen
 C01B 21/32
·  ·  ·  ·  Apparatus
 C01B 21/34
·  ·  Nitrogen trioxide (N2O3)
 C01B 21/36
·  ·  Nitrogen dioxide (NO2, N2O4) (C01B 21/26, C01B 21/30 take precedence)
 C01B 21/38
·  ·  Nitric acid
 C01B 21/40
·  ·  ·  Preparation by absorption of oxides of nitrogen
 C01B 21/42
·  ·  ·  Preparation from nitrates
 C01B 21/44
·  ·  ·  Concentration
 C01B 21/46
·  ·  ·  Purification; Separation
 C01B 21/48
·  ·  Methods for the preparation of nitrates in general (particular individual nitrates, see the relevant groups in C01B-C01G according to the cation)
 C01B 21/50
·  ·  Nitrous acid; Salts thereof
 C01B 21/52
·  Halogen compounds of nitrogen (C01B 21/18 takes precedence)
 C01B 21/54
·  Sulphur compounds of nitrogen
 C01B 23/00
Noble gases; Compounds thereof; Radon (liquefying F25J)
 C01B 25/00
Phosphorus; Compounds thereof (nitrides C01B 21/06)
 C01B 25/02
·  Preparation of phosphorus
 C01B 25/04
·  Purification of phosphorus
 C01B 25/06
·  Hydrogen phosphides
 C01B 25/08
·  Other phosphides
 C01B 25/10
·  Halides of phosphorus including compounds containing chalcogens, i.e. sulphur, selenium, tellurium, oxygen
 C01B 25/12
·  Oxides of phosphorus
 C01B 25/14
·  Sulphur, selenium, or tellurium compounds of phosphorus
 C01B 25/16
·  Oxyacids of phosphorus; Salts thereof
 C01B 25/18
·  ·  Phosphoric acid
 C01B 25/20
·  ·  ·  Preparation from elemental phosphorus
 C01B 25/22
·  ·  ·  Preparation by the wet process
 C01B 25/24
·  ·  Condensed phosphoric acids
 C01B 25/26
·  ·  Phosphates (perphosphates C01B 15/16)
 C01B 25/28
·  ·  ·  Ammonium phosphates
 C01B 25/30
·  ·  ·  Alkali metal phosphates
 C01B 25/32
·  ·  ·  Phosphates of magnesium, calcium, strontium, or barium
 C01B 25/34
·  ·  ·  Magnesium phosphates
 C01B 25/36
·  ·  ·  Aluminium phosphates
 C01B 25/38
·  ·  ·  Condensed phosphates
 C01B 27/00 - 
C01B 29/00
Compounds of arsenic or antimony (the elements themselves C22B)
 C01B 27/00
Arsenic compounds
 C01B 27/02
·  Arsenates; Arsenites
 C01B 29/00
Antimony compounds
 C01B 29/02
·  Antimonates; Antimonites
 C01B 31/00
Carbon; Compounds thereof (carbon black C09C; gas carbon C10B)
 C01B 31/02
·  Preparation of carbon; Purification
 C01B 31/04
·  ·  Graphite
 C01B 31/06
·  ·  Diamond
 C01B 31/07
·  Preparation of fibres or fabrics of carbon
 C01B 31/08
·  Active carbon
 C01B 31/10
·  ·  Preparation by using gaseous activating agents
 C01B 31/12
·  ·  Preparation by using non-gaseous activating agents
 C01B 31/14
·  ·  Granulation (apparatus B01J 2/00)
 C01B 31/16
·  Preparation of ion-exchanging materials from carbonaceous material
 C01B 31/18
·  Carbon monoxide (metal carbonyls C01G)
 C01B 31/20
·  Carbon dioxide
 C01B 31/22
·  ·  Solidifying
 C01B 31/24
·  Methods for the preparations of carbonates or bicarbonates in general (percarbonates C01B 15/10; particular individual carbonates, see the relevant groups in C01B-C01G according to the cation)
 C01B 31/26
·  Compounds containing carbon and sulphur, e.g. carbon disulphide, carbon oxysulphide; Thiophosgene
 C01B 31/28
·  Phosgene
 C01B 31/30
·  Carbides (hard alloys C22)
 C01B 31/32
·  ·  Calcium carbide
 C01B 31/34
·  ·  Tungsten or molybdenum carbides
 C01B 31/36
·  ·  Carbides of silicon or boron
 C01B 33/00
Silicon; Compounds thereof (nitrides C01B 21/06; carbides C01B 31/36)
 C01B 33/02
·  Silicon; Preparation; Purification
 C01B 33/04
·  Hydrides of silicon
 C01B 33/06
·  Metal silicides (alloys C22)
 C01B 33/08
·  Halides of silicon
 C01B 33/10
·  ·  Compounds containing silicon, fluorine, and other elements
 C01B 33/12
·  Silica; Hydrates thereof
 C01B 33/14
·  ·  Colloidal silica (sols and hydrogels)
 C01B 33/16
·  ·  Silica gel
 C01B 33/18
·  ·  Finely-divided silica
 C01B 33/20
·  Silicates (persilicates C01B 15/14)
 C01B 33/22
·  ·  Magnesium silicates
 C01B 33/24
·  ·  Alkaline-earth metal silicates
 C01B 33/26
·  ·  Aluminium-containing silicates
 C01B 33/28
·  ·  ·  Base exchange silicates (regeneration B01J 1/00)
 C01B 33/30
·  ·  ·  Bleaching earth
 C01B 33/32
·  ·  Alkali metal silicates
 C01B 35/00
Boron; Compounds thereof (boron hydrides C01B 6/00; perborates C01B 15/12; nitrides C01B 21/06; phosphides C01B 25/08; carbides C01B 31/36; hard alloys C22)