Process for the production of a silica colloid

Details Process for the production of a silica colloid Process for the production of a silica colloid

1990-12-12

1993-08-17

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

2523156, 423339, B01J 1300, C01B 33143

Patent

active

052366235

ABSTRACT:
Silica colloids having a spherical form, a mean diameter of between about 10 and 100 nm and a polydispersity index between about 1 and 4. A process for making silica colloids is also provided comprising a) forming a reaction medium by simultaneously adding an acidifying agent and an alkaline silicate solution to a reaction vessel, b) reacting the acidifying agent and alkaline silicate solution, and c) maintaining a constant volume of the reaction medium by drawing off the reaction medium.

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Iler, The Chemistry of Silica, pp. 174-177 (1979).

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