|  | C |
SECTION C — CHEMISTRY AND METALLURGY

CHEMISTRY

|  | C01 |
INORGANIC CHEMISTRY (obtaining metal compounds by metallurgical processes Fulltext... Hierarchy... Expanded...C21B, Fulltext... Hierarchy... Expanded...C22B)

|  | C01B |
NON-METALLIC ELEMENTS; METALLOIDS AND THEIR COMPOUNDS, EXCEPT THOSE COVERED BY Fulltext... Hierarchy... Expanded...C01C (arsenic, antimony Fulltext... Hierarchy... Expanded...C22B)

|  | C01B |
Note(s) Within this sub-class in the absence of a reference to the contrary, a compound is classified in Fulltext... Hierarchy... Expanded...C01B the last appropriate place. Group Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...C10G takes precedence)

|  | C01B 1/16 |
· · · | of hydrocarbons

|  | C01B 1/18 |
· · · · | catalytic (Fulltext... Hierarchy... Expanded...C01B 1/20 takes precedence)

|  | C01B 1/20 |
· · · · | with moving solid particles, e.g. of catalyst

|  | C01B 1/26 |
· | Separation; Purification (by liquefying Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C01B 2/18-C01B 2/22 take precedence)

|  | C01B 2/26 |
· · | followed by a reaction covered by group Fulltext... Hierarchy... Expanded...C01B 2/06

|  | C01B 2/28 |
· | by decomposition of gaseous liquid organic compounds (Fulltext... Hierarchy... Expanded...C10G takes precedence; coking liquid carbonaceous materials Fulltext... Hierarchy... Expanded...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+D2—NH2+HD (deuterides or tritiides of metal or boron Fulltext... Hierarchy... Expanded...C01B 6/00; heavy water Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C01B 11/00)

|  | C01B 7/02 |
· | Chlorine

|  | C01B 7/04 |
· · | Preparation from HCl

|  | C01B 7/06 |
· · | Preparation by electrolysis (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F25J)

|  | C01B 13/04 |
· · | by electrolysis of water

|  | C01B 13/06 |
· · · | Apparatus (electrolytic apparatus in genera Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C01B-C01G, according to the element combined with the oxygen or hydroxyl)

|  | C01B 15/00 |
Peroxides; Peracids; Salts thereof (peroxyacids of halogens, salts thereof Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C01C; sulphides or polysulphides of metals, other than alkali metals, magnesium, calcium, strontium, and barium, see the relevant groups in Fulltext... Hierarchy... Expanded...C01F or Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...C21B 1/00, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C01B-C01G according to the cation)

|  | C01B 17/64 |
· | Thiosulphates; Hyposulphites; Polythionates

|  | C01B 17/66 |
· · | Hyposulphites

|  | C01B 17/68 |
· | Sulphur trioxide (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C01B-C01G according to the cation)

|  | C01B 17/98 |
· | Other compounds containing sulphur and oxygen (persulphuric acids Fulltext... Hierarchy... Expanded...C01B 15/06; persulphates Fulltext... Hierarchy... Expanded...C01B 15/08)

|  | C01B 19/00 |
Selenium; Tellurium; Compounds thereof (phosphorus compounds Fulltext... Hierarchy... Expanded...C01B 25/14)

|  | C01B 21/00 |
Nitrogen; Compounds thereof

|  | C01B 21/02 |
· | Preparation of nitrogen (from ammonia Fulltext... Hierarchy... Expanded...C01B 1/04)

|  | C01B 21/04 |
· | Purification and/or separation of nitrogen (by liquefying Fulltext... Hierarchy... Expanded...F25J)

|  | C01B 21/06 |
· | Nitrides (hard alloys Fulltext... Hierarchy... Expanded...C22)

|  | C01B 21/08 |
· | Hydrazoic acid; Azides

|  | C01B 21/10 |
· | Imido and amido compounds (takes precedence over other groups of Fulltext... Hierarchy... Expanded...C01B; cyanamide Fulltext... Hierarchy... Expanded...C01C)

|  | C01B 21/12 |
· · | Carbamic acid; Inorganic salts thereof (organic salts Fulltext... Hierarchy... Expanded...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) (Fulltext... Hierarchy... Expanded...C01B 21/26, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C01B-C01G according to the cation)

|  | C01B 21/50 |
· · | Nitrous acid; Salts thereof

|  | C01B 21/52 |
· | Halogen compounds of nitrogen (Fulltext... Hierarchy... Expanded...C01B 21/18 takes precedence)

|  | C01B 21/54 |
· | Sulphur compounds of nitrogen

|  | C01B 23/00 |
Noble gases; Compounds thereof; Radon (liquefying Fulltext... Hierarchy... Expanded...F25J)

|  | C01B 25/00 |
Phosphorus; Compounds thereof (nitrides Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C09C; gas carbon Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B01J 2/00)

|  | C01B 31/16 |
· | Preparation of ion-exchanging materials from carbonaceous material

|  | C01B 31/18 |
· | Carbon monoxide (metal carbonyls Fulltext... Hierarchy... Expanded...C01G)

|  | C01B 31/20 |
· | Carbon dioxide

|  | C01B 31/22 |
· · | Solidifying

|  | C01B 31/24 |
· | Methods for the preparations of carbonates or bicarbonates in general (percarbonates Fulltext... Hierarchy... Expanded...C01B 15/10; particular individual carbonates, see the relevant groups in Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C01B 21/06; carbides Fulltext... Hierarchy... Expanded...C01B 31/36)

|  | C01B 33/02 |
· | Silicon; Preparation; Purification

|  | C01B 33/04 |
· | Hydrides of silicon

|  | C01B 33/06 |
· | Metal silicides (alloys Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B01J 1/00)

|  | C01B 33/30 |
· · · | Bleaching earth

|  | C01B 33/32 |
· · | Alkali metal silicates

|  | C01B 35/00 |
Boron; Compounds thereof (boron hydrides Fulltext... Hierarchy... Expanded...C01B 6/00; perborates Fulltext... Hierarchy... Expanded...C01B 15/12; nitrides Fulltext... Hierarchy... Expanded...C01B 21/06; phosphides Fulltext... Hierarchy... Expanded...C01B 25/08; carbides Fulltext... Hierarchy... Expanded...C01B 31/36; hard alloys Fulltext... Hierarchy... Expanded...C22)