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COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides { monoborane, diborane or addition complexes thereof}C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulfides C01B 17/22; thiosulfates, 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; { compounds other than ammonia and cyanogen, containing nitrogen and other non-metals C01B 21/082}; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 21/50; { compounds of noble gases C01B 23/0005}; 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)
Definition statement
This subclass covers:
  • Oxides or hydroxides; halides; sulfates or sulfites; carbonates; nitrates of sodium, potassium or other alkali
  • metals in general
  • Compounds of sodium or potassium not provided for elsewhere
  • Lithium compounds, e.g. oxides, halides, sulfates, carbonates, nitrates
  • Rubidium, caesium or francium compounds
  • Synthesis, treatment or modification of any the elements or compounds above
  • Forming shaped alkali metal compounds and the shaped products, per se, e.g. granules
References relevant to classification in this subclass

This subclass does not cover exceptions to the last appropriate place rule:

Metal hydrides, monoborane, diborane or addition complexes thereof

Salts of oxyacids of halogens

Peroxides, salts of peroxyacids

Sulfides or polysulfides of magnesium, calcium, strontium, or barium

Thiosulfates, dithionites, polythionates

Compounds containing selenium or tellurium

Binary compounds of nitrogen with metals

Azides

Compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals

Amides or imides of silicon

Metal imides or amides

Nitrites

Compounds of noble gases

Phosphides

Salts of oxyacids of phosphorus

Carbides

Compounds containing silicon

Compounds containing boron

Compounds having molecular sieve properties but not having base-exchange properties

Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites

Cyanides

Salts of cyanic acid

Salts of cyanamide

Thiocyanates

Special rules of classification within this subclass

In this subclass, in the absence of an indication to the contrary, a compound is classified in the last appropriate place.

Oxides or hydroxides of sodium, potassium or alkali metals in general
Definition statement
This group covers:

Oxides or hydroxides of sodium or of potassium when claimed per se or the preparation thereof.

For example :

  • Preparation by reacting oxides with alkali metal salts, from cyano compounds
  • Purification by crytallisation, oxydation, dialysis
  • Preparation in the form of shaped products
Halides of sodium, potassium or alkali metals in general {(halides in general C01B 9/00)}
Definition statement
This group covers:

Halides of sodium or of potassium when claimed per se or the preparation thereof.

For example :

  • Preparation by working up brines
  • Purification by solid chelating agents, with selective solvents, by melting
  • Preparation in the form of shaped products
  • Prevention of moisture absorption of the crystals
References relevant to classification in this group
This group does not cover:

Halides in general

Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B 17/62)}
Definition statement
This group covers:

Sulfates and sulfites of sodium or of potassium when claimed per se or the preparation thereof.

For example :

  • Preparation of sulfates from akali slats and sulfuric acids
  • Preparation of potassium sulfate from alunite
  • Preparation of sulfates by double decomposition
  • Preparation of sulfites
  • Purification or dehydration
  • Preparation in the form of shaped products
  • Prevention of moisture absorption of the crystals
Carbonates of sodium, potassium or alkali metals in general
Definition statement
This group covers:

Carbonates of sodium or of potassium when claimed per se or the preparation thereof.

For example :

  • Preparation by double decomposition
  • Preparation from the hydroxides
  • Preparation of bicarbonatesm sesquicarbonates
  • Purification by crystallisation, by oxydation, by electrolysis
  • Preparation in the form of shaped products
  • Prevention of moisture absorption
Nitrates of sodium, potassium or alkali metals in general {(preparation as fertilizers or of fertilizers containing them C05D 5/00)}
Definition statement
This group covers:

Nitrates of sodium or of potassium when claimed per se or the preparation thereof.

For example :

  • Preparation by working-up natural salt mixtures
  • Preparation with gaseous nitric acid or nitrogen oxides
  • Preparation of by double decomposition
  • Purification
  • Preparation in the form of shaped products
  • Prevention of moisture absorption
References relevant to classification in this group
This group does not cover:

Preparation of fertilizers or of fertilizers containing them

Compounds of sodium or potassium not provided for elsewhere
Definition statement
This group covers:

Compounds of sodium or potassium not provided for elsewhere when claimed per se or the preparation thereof.

Lithium compounds
Definition statement
This group covers:

Compounds of lithium claimed per se or the preparation thereof.

For example :

  • Lithium hexafluorophosphate
  • Oxides, halides, carbonates, nitrates of lithium
Rubidium, caesium or francium compounds
Definition statement
This group covers:

Compounds of rubidium, caesium, or francium claimed per se or the preparation thereof.

For example :

  • Compounds of Rubidium, Caesium or Francium combined with alkali metals
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Last Modified: 10/11/2013