|  | C |
SECTION C — CHEMISTRY AND METALLURGY

|  | C |
Note(s) Definitions for Section C: Alkali metals: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: Ca, Sr, Ba, Ra Lanthanides: elements with atomic numbers 57 to 71 inclusive Rare earths: Sc, Y, Lanthanides Actinides: elements with atomic numbers 89 to 103 inclusive Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W Halogens: F, Cl, Br, I, At Noble gases: He, Ne, Ar, Kr, Xe, Rn Platinum group: Os, Ir, Pt, Ru, Rh, Pd Noble metals: Ag, Au, Platinum group Light metals: alkali metals, alkaline earth metals, Be, Al, Mg Heavy metals: metals other than light metals Iron group: Fe, Co, Ni Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens Metals: elements other than non-metals Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

CHEMISTRY

|  | C01 |
INORGANIC CHEMISTRY (obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal Fulltext... Hierarchy... Expanded...C21B, Fulltext... Hierarchy... Expanded...C22B; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis Fulltext... Hierarchy... Expanded...C25B)

|  | C01 |
Note(s) In the absence of an indication to the contrary, a compound is classified in the last appropriate place within this class. [3]

|  | C01F |
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides Fulltext... Hierarchy... Expanded...C01B 6/00; salts of oxyacids of halogens Fulltext... Hierarchy... Expanded...C01B 11/00; peroxides, salts of peroxyacids Fulltext... Hierarchy... Expanded...C01B 15/00; sulphides or polysulphides of magnesium, calcium, strontium, or barium Fulltext... Hierarchy... Expanded...C01B 17/42; thiosulphates, dithionites, polythionates Fulltext... Hierarchy... Expanded...C01B 17/64; compounds containing selenium or tellurium Fulltext... Hierarchy... Expanded...C01B 19/00; binary compounds of nitrogen with metals Fulltext... Hierarchy... Expanded...C01B 21/06; azides Fulltext... Hierarchy... Expanded...C01B 21/08; metal amides Fulltext... Hierarchy... Expanded...C01B 21/092; nitrites Fulltext... Hierarchy... Expanded...C01B 21/50; phosphides Fulltext... Hierarchy... Expanded...C01B 25/08; salts of oxyacids of phosphorus Fulltext... Hierarchy... Expanded...C01B 25/16; carbides Fulltext... Hierarchy... Expanded...C01B 31/30; compounds containing silicon Fulltext... Hierarchy... Expanded...C01B 33/00; compounds containing boron Fulltext... Hierarchy... Expanded...C01B 35/00; cyanides Fulltext... Hierarchy... Expanded...C01C 3/08; salts of cyanic acid Fulltext... Hierarchy... Expanded...C01C 3/14; salts of cyanamide Fulltext... Hierarchy... Expanded...C01C 3/16; thiocyanates Fulltext... Hierarchy... Expanded...C01C 3/20)

|  | C01F 1/00 |
Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, and the rare earths, in general

|  | C01F 3/00 |
Compounds of beryllium

|  | C01F 3/02 |
· | Oxides; Hydroxides [3]

|  | C01F 5/00 |
Compounds of magnesium

|  | C01F 5/02 |
· | Magnesia

|  | C01F 5/04 |
· · | by oxidation of metallic magnesium

|  | C01F 5/06 |
· · | by thermal decomposition of magnesium compounds (calcining magnesite or dolomite Fulltext... Hierarchy... Expanded...C04B 3/00)

|  | C01F 5/08 |
· · · | by calcining magnesium hydroxide

|  | C01F 5/10 |
· · · | by thermal decomposition of magnesium chloride with water vapour

|  | C01F 5/12 |
· · · | by thermal decomposition of magnesium sulphate, with or without reduction

|  | C01F 5/14 |
· | Magnesium hydroxide

|  | C01F 5/16 |
· · | by treating magnesia, e.g. calcined dolomite, with water or solutions of salts not containing magnesium

|  | C01F 5/20 |
· · | by precipitation from solutions of magnesium salts with ammonia

|  | C01F 5/22 |
· · | from magnesium compounds with alkali hydroxides or alkaline-earth oxides or hydroxides

|  | C01F 5/24 |
· | Magnesium carbonates

|  | C01F 5/26 |
· | Magnesium halides

|  | C01F 5/28 |
· · | Fluorides

|  | C01F 5/30 |
· · | Chlorides

|  | C01F 5/32 |
· · · | Preparation of anhydrous magnesium chloride by chlorinating magnesium compounds

|  | C01F 5/34 |
· · · | Dehydrating magnesium chloride containing water of crystallisation

|  | C01F 5/36 |
· · | Bromides

|  | C01F 5/38 |
· | Magnesium nitrates

|  | C01F 5/40 |
· | Magnesium sulphates (double sulphates of magnesium with sodium or potassium Fulltext... Hierarchy... Expanded...C01D 5/12, with other alkali metals Fulltext... Hierarchy... Expanded...C01D 15/06, Fulltext... Hierarchy... Expanded...C01D 17/00)

|  | C01F 5/42 |
· | Magnesium sulphites

|  | C01F 7/00 |
Compounds of aluminium

|  | C01F 7/02 |
· | Aluminium oxide; Aluminium hydroxide; Aluminates

|  | C01F 7/04 |
· · | Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom

|  | C01F 7/06 |
· · · | by treating aluminous minerals with alkali hydroxide

|  | C01F 7/08 |
· · · | by treating aluminous minerals with sodium carbonate

|  | C01F 7/10 |
· · · | by treating aluminous minerals with alkali sulphates and reducing agents

|  | C01F 7/12 |
· · · | Alkali metal aluminates from alkaline-earth metal aluminates

|  | C01F 7/14 |
· · · | Aluminium oxide or hydroxide from alkali metal aluminates

|  | C01F 7/16 |
· · | Preparation of alkaline-earth metal aluminates; Aluminium oxide or hydroxide therefrom

|  | C01F 7/18 |
· · · | Aluminium oxide or hydroxide from alkaline-earth metal aluminates

|  | C01F 7/20 |
· · | Preparation of aluminium oxide or hydroxide from aluminous ores with acids or salts

|  | C01F 7/22 |
· · · | with halides

|  | C01F 7/24 |
· · · | with nitric acid or nitrogen oxides

|  | C01F 7/26 |
· · · | with sulphuric acids or sulphates

|  | C01F 7/28 |
· · · | with sulphurous acid

|  | C01F 7/30 |
· · | Preparation of aluminium oxide or hydroxide by thermal decompositon of aluminium compounds

|  | C01F 7/32 |
· · · | of sulphates

|  | C01F 7/34 |
· · | Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts

|  | C01F 7/36 |
· · · | from organic aluminium salts

|  | C01F 7/38 |
· · | Preparation of aluminium oxide by thermal reduction of aluminous minerals

|  | C01F 7/40 |
· · · | in the presence of aluminium sulphide

|  | C01F 7/42 |
· · | Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation

|  | C01F 7/44 |
· · | Dehydration of aluminium hydroxide

|  | C01F 7/46 |
· · | Purification of aluminium hydroxide or oxide

|  | C01F 7/48 |
· | Aluminium halides

|  | C01F 7/50 |
· · | Fluorides

|  | C01F 7/52 |
· · · | Double compounds containing both fluorine and other acid groups

|  | C01F 7/54 |
· · · | Double compounds containing both aluminium and alkali metals or alkaline-earth metals

|  | C01F 7/56 |
· · | Chlorides (containing fluorine Fulltext... Hierarchy... Expanded...C01F 7/52)

|  | C01F 7/58 |
· · · | Preparation of anhydrous aluminium chloride

|  | C01F 7/60 |
· · · · | from oxygen-containing aluminium compounds

|  | C01F 7/62 |
· · · | Purification

|  | C01F 7/64 |
· · | Bromides (containing fluorine Fulltext... Hierarchy... Expanded...C01F 7/52)

|  | C01F 7/66 |
· | Aluminium nitrates (containing fluorine Fulltext... Hierarchy... Expanded...C01F 7/52)

|  | C01F 7/68 |
· | Aluminium compounds containing sulphur (containing fluorine Fulltext... Hierarchy... Expanded...C01F 7/52)

|  | C01F 7/70 |
· · | Sulphides

|  | C01F 7/72 |
· · | Sulphites

|  | C01F 7/74 |
· · | Sulphates

|  | C01F 7/76 |
· · · | Double salts, e.g. alum

|  | C01F 11/00 |
Compounds of calcium, strontium, or barium (Fulltext... Hierarchy... Expanded...C01F 7/00 takes precedence)

|  | C01F 11/02 |
· | Oxides or hydroxides (production of lime Fulltext... Hierarchy... Expanded...C04B 1/00)

|  | C01F 11/04 |
· · | by thermal decomposition

|  | C01F 11/06 |
· · · | of carbonates

|  | C01F 11/08 |
· · | by reduction of sulphates

|  | C01F 11/10 |
· · | from sulphides

|  | C01F 11/12 |
· · | from silicates

|  | C01F 11/16 |
· · | Purification

|  | C01F 11/18 |
· | Carbonates

|  | C01F 11/20 |
· | Halides

|  | C01F 11/22 |
· · | Fluorides

|  | C01F 11/24 |
· · | Chlorides

|  | C01F 11/26 |
· · · | from sulphides

|  | C01F 11/28 |
· · · | by chlorination of alkaline-earth metal compounds

|  | C01F 11/30 |
· · · | Concentrating; Dehydrating; Preventing the absorption of moisture or caking

|  | C01F 11/32 |
· · · | Purification

|  | C01F 11/34 |
· · | Bromides

|  | C01F 11/36 |
· | Nitrates

|  | C01F 11/38 |
· · | Preparation with nitric acid or nitrogen oxides

|  | C01F 11/40 |
· · | Preparation by double decomposition with nitrates

|  | C01F 11/42 |
· · | Double salts (with magnesium Fulltext... Hierarchy... Expanded...C01F 5/38)

|  | C01F 11/44 |
· · | Concentrating; Crystallising; Dehydrating; Preventing the absorption of moisture or caking

|  | C01F 11/46 |
· | Sulphates (dehydration of gypsum Fulltext... Hierarchy... Expanded...C04B 11/02)

|  | C01F 11/48 |
· | Sulphites

|  | C01F 13/00 |
Compounds of radium

|  | C01F 15/00 |
Compounds of thorium

|  | C01F 17/00 |
Compounds of the rare-earth metals, i.e. scandium, yttrium, lanthanum, and the group of the lanthanides