CPC Subgroup
C01B 17/22 Alkali metal sulfides or polysulfides
Full Title
Sulfur; Compounds thereof > Alkali metal sulfides or polysulfides
7 direct subcodes
Child Classifications
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- C01B 17/24 Preparation by reduction
- C01B 17/30 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 17/40 Making shaped products, e.g. granules