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PCE
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DIFF Subgroup
C01B 33/154

by acidic treatment of aqueous silicate solutions

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Silicon; Compounds thereof > Silicon oxides; Hydrates thereof > Silica; Hydrates thereof, e.g. lepidoic silicic acid > Colloidal silica, e.g. dispersions, gels, sols > Preparation of hydrogels > by acidic treatment of aqueous silicate solutions

CPC:

Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956) > Silicon oxides; Hydrates thereof > Silica; Hydrates thereof, e.g. lepidoic silicic acid > Colloidal silica, e.g. dispersions, gels, sols > Preparation of hydrogels > by acidic treatment of aqueous silicate solutions

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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