Preparation of large particle silica sols

Details Preparation of large particle silica sols Preparation of large particle silica sols

1980-03-20

1981-12-08

Kyle, Deborah L.

Abrasive tool making process, material, or composition

With inorganic material

Clay, silica, or silicate

25213S, 423335, B01J 1300, C01B 33141

Patent

active

043045758

ABSTRACT:
Large particle aqueous silica sols are prepared in a single step by heating an alkaline aqueous slica sol containing smaller silica particles mixed with larger silica particles while maintaining the ratio of the total surface area of the smaller silica particles to the total surface area of the larger silica particles at a predetermined ratio and under conditions such that the smaller silica particles dissolve and redeposit on the larger silica particles thereby producing an aqueous silica sol in which the majority of the silica particles have a size significantly larger than the larger silica particles in the starting mixed sol.

REFERENCES:
patent: 3012973 (1961-12-01), Atkins
patent: 3538015 (1970-11-01), Mindick

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