IPC Subgroup
C01B 33/146 After-treatment of sols
Introduced: January 1980
Last revised: January 2006
Full Title
Silicon; Compounds thereof > Silicon oxides; Hydrates thereof > Silica; Hydrates thereof, e.g. lepidoic silicic acid > Colloidal silica, e.g. dispersions, gels, sols > After-treatment of sols
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
3 direct subcodes
Child Classifications
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- C01B 33/148 Concentration; Drying; Dehydration; Stabilisation; Purification
- C01B 33/149 Coating
- C01B 33/151 by progressively adding a sol to a different sol, i.e. "build up" of particles using a "heel"