CPC Subgroup
C01B 33/20 Silicates (persilicates C01B15/14 )
Full Title
Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956) > Silicates (persilicates C01B15/14 )
5 direct subcodes
Child Classifications
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- C01B 33/22 Magnesium silicates
- C01B 33/24 Alkaline-earth metal silicates
- C01B 33/26 Aluminium-containing silicates
- C01B 33/32 Alkali metal silicates ( , C01B33/26 take precedence)
- C01B 33/36 having base-exchange properties but not having molecular sieve properties (regeneration thereof B01J49/00)