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 C21B, C22B; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis 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]

 C01D
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulphides or polysulphides C01B 17/22; 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)
 C01D 1/00
Oxides or hydroxides of sodium, potassium, or alkali metals in general  [2]
 C01D 1/02
·  Oxides
 C01D 1/04
·  Hydroxides
 C01D 1/20
·  ·  Preparation by reacting oxides or hydroxides with alkali metal salts
 C01D 1/22
·  ·  ·  with carbonates or bicarbonates
 C01D 1/24
·  ·  ·  from or via fluorides or silico-fluorides
 C01D 1/26
·  ·  Preparation from or via cyano coumpounds, e.g. cyanides, cyanamides
 C01D 1/28
·  ·  Purification; Separation
 C01D 1/30
·  ·  ·  by crystallisation
 C01D 1/32
·  ·  ·  by adsorption or precipitation
 C01D 1/34
·  ·  ·  with selective solvents
 C01D 1/36
·  ·  ·  by oxidation
 C01D 1/38
·  ·  ·  by dialysis
 C01D 1/40
·  ·  ·  by electrolysis
 C01D 1/42
·  ·  Concentration; Dehydration
 C01D 1/44
·  ·  Preparation in the form of granules, pieces, or other shaped products
 C01D 3/00
Halides of sodium, potassium, or alkali metals in general  [2]
 C01D 3/02
·  Fluorides
 C01D 3/04
·  Chlorides
 C01D 3/06
·  ·  Preparation by working up brines, seawater or spent lyes
 C01D 3/08
·  ·  Preparation by working up natural or industrial salt mixtures or siliceous minerals
 C01D 3/10
·  Bromides
 C01D 3/12
·  Iodides
 C01D 3/14
·  Purification
 C01D 3/16
·  ·  by precipitation or adsorption
 C01D 3/18
·  ·  with selective solvents
 C01D 3/20
·  ·  by melting
 C01D 3/22
·  Preparation in the form of granules, pieces, or other shaped products
 C01D 3/24
·  ·  Influencing the crystallisation process
 C01D 3/26
·  Preventing the absorption of moisture or caking of the crystals
 C01D 5/00
Sulphates or sulphites of sodium, potassium, or alkali metals in general  [2]
 C01D 5/02
·  Preparation of sulphates from alkali metal salts and sulphuric acid or bisulphates; Preparation of bisulphates
 C01D 5/04
·  Preparation of sulphates with the aid of sulphurous acid or sulphites, e.g. Hargreaves process
 C01D 5/06
·  Preparation of sulphates by double decomposition
 C01D 5/08
·  ·  with each other or with ammonium sulphate
 C01D 5/10
·  ·  with sulphates of magnesium, calcium, strontium, or barium
 C01D 5/12
·  Preparation of double sulphates of magnesium with sodium or potassium  [2]
 C01D 5/14
·  Preparation of sulphites (C01D 5/04 takes precedence)
 C01D 5/16
·  Purification
 C01D 5/18
·  Dehydration
 C01D 7/00
Carbonates of sodium, potassium, or alkali metals in general  [2]
 C01D 7/02
·  Preparation by double decomposition
 C01D 7/04
·  ·  with a fluoride or silico-fluoride (C01D 1/24 takes precedence)
 C01D 7/06
·  Preparation via sodium or potassium magnesium carbonate
 C01D 7/07
·  Preparation from the hydroxides  [2]
 C01D 7/08
·  Preparation from or via cyano compounds of sodium or potassium (C01D 1/26 takes precedence)
 C01D 7/10
·  Preparation of bicarbonates from carbonates (ammonia-soda process C01D 7/18)
 C01D 7/12
·  Preparation of carbonates from bicarbonates
 C01D 7/14
·  Preparation of sesquicarbonates
 C01D 7/16
·  Preparation from compounds of sodium or potassium with amines and carbon dioxide
 C01D 7/18
·  Preparation by the ammonia-soda process
 C01D 7/22
·  Purification
 C01D 7/24
·  ·  Crystallisation
 C01D 7/26
·  ·  by precipitation or adsorption
 C01D 7/28
·  ·  with selective solvents
 C01D 7/30
·  ·  by oxidation
 C01D 7/32
·  ·  by dialysis
 C01D 7/34
·  ·  by electrolysis
 C01D 7/35
·  Varying the content of water of crystallisation or the specific gravity  [2]
 C01D 7/37
·  ·  Densifying sodium carbonate  [2]
 C01D 7/38
·  Preparation in the form of granules, pieces, or other shaped products
 C01D 7/40
·  ·  Influencing the crystallisation process
 C01D 7/42
·  Preventing the absorption of moisture or caking
 C01D 9/00
Nitrates of sodium, potassium, or alkali metals in general  [2]
 C01D 9/02
·  Preparation by working-up natural salt mixtures
 C01D 9/04
·  Preparation with liquid nitric acid
 C01D 9/06
·  Preparation with gaseous nitric acid or nitrogen oxides
 C01D 9/08
·  Preparation by double decomposition
 C01D 9/10
·  ·  with ammonium nitrate
 C01D 9/12
·  ·  with nitrates of magnesium, calcium, strontium, or barium
 C01D 9/14
·  ·  of salts of potassium with sodium nitrate
 C01D 9/16
·  Purification
 C01D 9/18
·  Preparation in the form of shaped products, e.g. granules
 C01D 9/20
·  Preventing the absorption of moisture or caking
 C01D 13/00
Compounds of sodium or potassium not provided for elsewhere  [2]
 C01D 15/00
Lithium compounds  [2]
 C01D 15/02
·  Oxides; Hydroxides  [2]
 C01D 15/04
·  Halides  [2]
 C01D 15/06
·  Sulphates; Sulphites  [2]
 C01D 15/08
·  Carbonates; Bicarbonates  [2]
 C01D 15/10
·  Nitrates  [2]
 C01D 17/00
Rubidium, caesium, or francium compounds  [2]