Process for preparing silicic acid hydrate

Details Process for preparing silicic acid hydrate Process for preparing silicic acid hydrate

C - Chemistry, Metallurgy

01

B

C01B 33/00 (2006.01) C01B 33/193 (2006.01) C01B 33/20 (2006.01)

Patent

CA 2158701

The present invention provides silicic acid hydrate having a large pore volume and tiny particle diameters, and a process for preparing it. There is disclosed silicic acid hydrate obtained by neutralizing an aqueous solution of sodium silicate with a mineral acid, which has particle properties represented by an oil absorption of 250 to 350 m1/100 g, a total pore volume of 4.0 to 6.0 cc/g, an average pore radius of 200 to 400 .ANG., and an average pore diameter of 3.0 to 15 µm by the laser method, or 2.0 to 4.0 µm by the coulter method, or 0.5 to 3.5 µm by the centrifugal precipitation method.

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