Process for manufacturing high purity silica

Details Process for manufacturing high purity silica Process for manufacturing high purity silica

C - Chemistry, Metallurgy

03

B

18/576

C03B 37/016 (2006.01) C01B 33/152 (2006.01) C01B 33/18 (2006.01) C03B 37/01 (2006.01) C03B 37/095 (2006.01) C03C 13/00 (2006.01)

Patent

CA 1271307

ABSTRACT: This invention deals with a process for manu- facturing high purity silica which comprises making an aqueous alkali silicate solution into fine fibrous gel in a coagulant, treating the fibrous gel obtained with an acid-containing solution, and then with water to extract and remove impurities; and optionally heating a resulting silica at a temperature of 1,000°C or higher. Thus obtained silica is preferably used as a filler, especially, the one for resin compositions for encapsulat- ing electronic parts; etc.

511722

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