IPC 7 English version C01B 23/00-C01B 33/46

IPC ⁷ English version

C01B 15/00 - C01B 21/50

C01B02300-C01B03346

C01B 35/00 - C01B 39/54

SECTION C – CHEMISTRY; METALLURGY

C 01

INORGANIC 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 B

NON-METALLIC ELEMENTS; COMPOUNDS THEREOF

23/

Noble gases; Compounds thereof (liquefying F25J)

25/

Phosphorus; Compounds thereof (C01B 21/00, C01B 23/00 take precedence; perphosphates C01B 15/16) [3]

25/

Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds [2]

25/

Preparation of phosphorus

25/

023

of red phosphorus [2]

25/

027

of yellow phosphorus [2]

25/

Purification of phosphorus

25/

043

of red phosphorus [2]

25/

047

of yellow phosphorus [2]

25/

Hydrogen phosphides

25/

Other phosphides

25/

Halides or oxyhalides of phosphorus [2]

25/

Oxides of phosphorus

25/

Sulfur, selenium, or tellurium compounds of phosphorus

25/

Oxyacids of phosphorus; Salts thereof (peroxyacids or salts thereof C01B 15/00)

25/

163

Phosphorous acid; Salts thereof [2]

25/

165

Hypophosphorous acid; Salts thereof [2]

25/

168

Pyrophosphorous acid; Salts thereof [2]

25/

Phosphoric acid

25/

Preparation from elemental phosphorus or phosphoric anhydride

25/

Preparation by reacting phosphate containing material with an acid, e.g. wet process

25/

222

with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen [3]

25/

223

only one form of calcium sulfate being formed [3]

25/

225

Dihydrate process [3]

25/

226

Hemihydrate process [3]

25/

228

one form of calcium sulfate being formed and then converted to another form [3]

25/

229

Hemihydrate-dihydrate process [3]

25/

231

Dihydrate-hemihydrate process [3]

25/

232

Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently lixiviating the obtained mass, e.g. clincker process [3]

25/

234

Purification; Stabilisation; Concentration (purification concomitant with preparation C01B 25/22; preparation involving solvent-solvent extraction C01B 25/46) [3]

25/

235

Clarification; Stabilisation to prevent post-precipitation of dissolved impurities [3]

25/

237

Selective elimination of impurities [3]

25/

238

Cationic impurities [3]

25/

Condensed phosphoric acids

25/

Phosphates (perphosphates C01B 15/16)

25/

Ammonium phosphates

25/

Alkali metal phosphates

25/

Phosphates of magnesium, calcium, strontium, or barium

25/

Magnesium phosphates

25/

Aluminium phosphates

25/

Phosphates of heavy metals [2]

25/

Condensed phosphates

25/

of alkali metals [3]

25/

Polyphosphates [2]

25/

of alkali metals [3]

25/

Pyrophosphates [2]

25/

Metaphosphates [2]

25/

445

of alkali metals [3]

25/

containing plural metal, or metal and ammonium [3]

25/

455

containing halogen [3]

25/

Preparation involving solvent-solvent extraction (solvent extraction in general B01D 11/00) [2]

31/

Carbon; Compounds thereof (C01B 21/00, C01B 23/00 take precedence; percarbonates C01B 15/10; carbon black C09C 1/48; gas carbon production C10B) [3]

31/

Preparation of carbon (by using ultra-high pressure, e.g. for the formation of diamonds, B01J 3/06; by crystal growth C30B); Purification

31/

Graphite

31/

Diamond

31/

Active carbon

31/

Preparation by using gaseous activating agents

31/

Preparation by using non-gaseous activating agents

31/

Granulation (apparatus B01J 2/00)

31/

Preparation of ion-exchanging materials from carbonaceous material

31/

Carbon monoxide (metal carbonyls C01G)

31/

Carbon dioxide

31/

Solidifying

31/

Methods for the preparation of carbonates or bicarbonates in general (percarbonates C01B 15/10; particular individual carbonates, see the relevant groups of subclasses C01B to C01G, according to the cation)

31/

Compounds containing carbon and sulfur, e.g. carbon disulfide, carbon oxysulfide; Thiophosgene

31/

Phosgene

31/

Carbides (alloys C22)

31/

Calcium carbide

31/

Tungsten or molybdenum carbides

31/

Carbides of silicon or boron

33/

Silicon; Compounds thereof (C01B 21/00, C01B 23/00 take precedence; persilicates C01B 15/14; carbides C01B 31/36) [3]

33/

Silicon (forming single crystals or homogeneous polycrystalline material with defined structure C30B) [5]

33/

021

Preparation (chemical coating from the vapour phase C23C 16/00) [5]

33/

023

by reduction of silica or silica-containing material [5]

33/

025

with carbon or a solid carbonaceous material, i.e. carbo-thermal process [5]

33/

027

by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material [5]

33/

029

by decomposition of monosilane [5]

33/

by decomposition of silicon halides or halosilanes or reduction thereof with hydrogen as the only reducing agent [5]

33/

031

by decomposition of silicon tetraiodide [5]

33/

033

by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents [5]

33/

035

by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal, e.g. tantalum or tungsten, or in the presence of heated silicon rods on which the formed silicon is deposited, a silicon rod being obtained, e.g. Siemens process [5]

33/

037

Purification (by zone-melting C30B 13/00) [5]

33/

039

by conversion of the silicon into a compound, optional purification of the compound, and reconversion into silicon [5]

33/

Hydrides of silicon

33/

Metal silicides (alloys C22)

33/

Compounds containing halogen

33/

Compounds containing silicon, fluorine, and other elements

33/

107

Halogenated silanes [3]

33/

113

Silicon oxides; Hydrates thereof [3]

33/

Silica; Hydrates thereof, e.g. lepidoic silicic acid [3]

33/

Colloidal silica, e.g. dispersions, gels, sols [3]

33/

141

Preparation of hydrosols or aqueous dispersions [3]

33/

142

by acidic treatment of silicates [3]

33/

143

of aqueous solutions of silicates [3]

33/

145

Preparation of hydroorganosols, organosols or dispersions in an organic medium [3]

33/

146

After-treatment of sols (preparation of hydroorganosols, organosols or dispersions in an organic medium from hydrosols C01B 33/145) [3]

33/

148

Concentration; Drying; Dehydration; Stabilisation; Purification [3]

33/

149

Coating [3]

33/

151

by progressively adding a sol to a different sol, i.e. "build up" of particles using a "heel" [3]

33/

152

Preparation of hydrogels [3]

33/

154

by acidic treatment of aqueous silicate solutions [3]

33/

155

Preparation of hydroorganogels or organogels [3]

33/

157

After-treatment of gels [3]

33/

158

Purification; Drying; Dehydrating [3]

33/

159

Coating or hydrophobisation [3]

33/

Preparation of silica xerogels [3]

33/

Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof (preparation of aerogels by dehydrating gels C01B 33/158; treatment to enhance the pigmenting or filling properties C09C) [3]

33/

187

by acidic treatment of silicates [3]

33/

193

of aqueous solutions of silicates [3]

33/

Silicates (persilicates C01B 15/14)

33/

Magnesium silicates

33/

Alkaline earth metal silicates

33/

Aluminium-containing silicates [5]

33/

Alkali metal silicates (C01B 33/26 takes precedence) [3]

33/

having base-exchange properties but not having molecular sieve properties (regeneration thereof B01J 49/00) [6]

33/

Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type [6]

33/

Clays [6]

33/

Micas [6]

33/

Products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds, e.g. organoclay material [6]

33/

Amorphous silicates, e.g. so-called "amorphous zeolites" (crystalline zeolites C01B 39/00) [6]

C01B 15/00 - C01B 21/50

C01B 35/00 - C01B 39/54