Method for preparation of silica particles

Details Method for preparation of silica particles Method for preparation of silica particles

1990-06-14

1993-10-26

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423339, 502 8, C01B 3312

Patent

active

052563863

ABSTRACT:
Silica particles which are substantially spherical, have a particle size of 1 to 100 .mu.m, a very narrow pore size distribution and a low alkali metal content. The particles can be prepared by sol-gel technique using emulsification technique for drop formation. The process comprises a sol growth step in a basic environment based on ammonium or amines and a post-treatment in such an environment. The silica particles are particularly suitable for use in chromatography as they have very good particle and porosity properties and high purity.

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