Process for the preparation of silica sol

Details Process for the preparation of silica sol Process for the preparation of silica sol

B - Operations, Transporting

01

J

134/51

B01J 13/00 (2006.01) C01B 33/142 (2006.01)

Patent

CA 1155728

12,260 PROCESS FOR THE PREPARATION OF STABLE SILICA SOL ABSTRACT OF THE DISCLOSURE Stable, colloidal, silica sol is provided by a process which comprises vigorously mixing a slurry of calcium silicate with a dilute acid having a pKa value of less than about 8, such as sulfuric acid, and thereafter separating the sol from the insoluble precipitate of calcium salt. The process provides an inexpensive method for production of the sol as opposed to those methods which currently use sodium silicate as the starting material. SPECIFICATION -1-

368401

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