IPC Revision WGDefinition Project D110
Subject: Compounds of alkali
metals
EPO Rapporteur Proposal
IPC range: C01D
2011-05-03
Title – C01D
Compounds of alkali metals, i.e. lithium, sodium, potassium,
rubidium, caesium, or francium
Definition statement
This subclass covers:
- Oxides or hydroxides of sodium, potassium or alkali metals in general and their methods of
preparation, purification, concentration, dehydration and the shaped products obtained with,
i.e. granules.
-Halides of sodium, potassium, or alkali metals in general and their purification, the
preparation in shaped products and the prevention of moisture's absorption.
- Sulfates or sulfites of sodium, potassium or alkali metals in general, their preparation,
purification and dehydration.
- Carbonates of sodium, potassium or alkali metals in general and their methods of
preparation, their purification, the variation of the water's content of crystallisation, the
preparation in shaped products and the prevention of moisture's absorption.
- Nitrates of sodium, potassium or alkali metals in general and their methods of preparation,
their purification, the preparation in shaped products and the prevention of moisture's
absorption.
- Compounds of sodium or potassium not provided for elsewhere.
- Lithium compounds, i.e. oxides, halides, sulfates, carbonates, nitrates.
- Rubidium, caesium or francium compounds
Relationship between large subject matter areas
References relevant to classification in this subclass
This subclass does not cover:
Metal hydrides
C01B6/00
Salts of oxyacids or halogens
C01B11/00
Peroxides, salts of peroxyacids
C01B15/00
Sulfides or polysulfides of alkali metals
C01B17/22
Thiosulfates, dithionites, polythionates
C01B17/64
Compounds containing selenium or tellurium
C01B19/00
Binary compounds of nitrogen with metals
C01B21/06
Azides
C01B21/08
Metal amides
C01B21/092
Nitrites
C001B21/50
Phosphides
C01B25/08
Salts of oxyacids of phosphorous
C01B25/16
Carbides
C01B31/30
Compounds containing silicon
C01B33/00
Compounds containing boron
C01B35/00
Cyanides
C01C3/08
Salts of cyanic acid
C01C3/14
Salts of cyanamide
C01C3/16
Thiocyanates
C01C3/20
Preparation of elements or inorganic compounds except carbon
dioxide by using micro-organisms or enzymes
C12P3/00
Burning, calcining lime, magnesite or dolomite
C04B2/10
Obtaining metal compounds from mixtures in a metallurgical
process
C22B
Production of non-metallic elements or inorganic compounds by
electrolysis or electrophoresis
C25B
Examples of places where the subject matter of this class is covered when specially adapted,
used for a particular purpose, or incorporated in a larger system:
Places in relation to which this subclass is residual:
Informative references
Attention is drawn to the following places, which may be of interest for search:
Calcination
B01J6/00
General methods of preparing halides
C01B9/00
Methods of preparing sulfites in general
C01B17/62
Production of calcium suflate cements
C04B11/02
Shaped ceramic products characterised by their composition
C04B35/00
Special rules of classification within this subclass
A compound is classified in the last place priority rule
Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:
Synonyms and Keywords
In patent documents the following abbreviations are often used:
In patent documents the following expressions/words "---", "---" and "---" are often used as
synonyms.
In patent documents the expression/word "---" is often used instead of "---" which is used in
the classification scheme of this subclass.
In patent documents the expression/word "---" is often used with the meaning "---"