C
SECTION C — CHEMISTRY; METALLURGY
 C

Note(s)

In section C, the definitions of groups of chemical elements are as follows:

  • 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 (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)
 C01

Note(s)

In this class, in the absence of an indication to the contrary, a compound is classified in the last appropriate place. [3]

 C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulphides or polysulphides of magnesium, calcium, strontium, or barium C01B 17/42; thiosulphates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; binary compounds of nitrogen with metals C01B 21/06; azides C01B 21/08; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; carbides C01B 31/30; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00; cyanides C01C 3/08; salts of cyanic acid C01C 3/14; salts of cyanamide C01C 3/16; thiocyanates C01C 3/20)
 C01F 1/00
Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or 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 C04B 2/10)
 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 C01D 5/12, with other alkali metals C01D 15/06, C01D 17/00)  [3]
 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 C01F 7/52)  [3]
 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 C01F 7/52)  [3]
 C01F 7/66
·  Aluminium nitrates (containing fluorine C01F 7/52)  [3]
 C01F 7/68
·  Aluminium compounds containing sulphur (containing fluorine C01F 7/52)  [3]
 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 (C01F 7/00 takes precedence)  [3]
 C01F 11/02
·  Oxides or hydroxides (production of lime C 04 B 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 adsorption 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 C01F 5/38)
 C01F 11/44
·  ·  Concentrating; Crystallising; Dehydrating; Preventing the adsorption of moisture or caking
 C01F 11/46
·  Sulphates (dehydration of gypsum 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, or the group of the lanthanides