IPC Subgroup
C01B 17/22 Alkali metal sulfides or polysulfides
Introduced: September 1968
Last revised: January 2006
Full Title
Sulfur; Compounds thereof > Alkali metal sulfides or polysulfides
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
Related Keywords
alkali metal SULFIDE(S)
7 direct subcodes
Child Classifications
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- C01B 17/24 Preparation by reduction
- C01B 17/3 Preparation from sodium or potassium amalgam with sulfur or sulfides
- C01B 17/32 Hydrosulfides of sodium or potassium
- C01B 17/34 Polysulfides of sodium or potassium
- C01B 17/36 Purification
- C01B 17/38 Dehydration
- C01B 17/4 Making shaped products, e.g. granules