Silica gel and electrodialytic method for its preparation

Details Silica gel and electrodialytic method for its preparation Silica gel and electrodialytic method for its preparation

C - Chemistry, Metallurgy

01

B

252/39, 134/53,

C01B 33/14 (2006.01) C01B 33/152 (2006.01) C01B 33/16 (2006.01) C25B 1/00 (2006.01) C25B 7/00 (2006.01)

Patent

CA 1152849

Abstract of the Disclosure Silica hydrogel is prepared by electrolysis of an aqueous anolyte solution containing an alkali metal silicate and a salt of a non-siliceous anion, such as sodium nitrate ox sodium sulfate, in a cell with a cation permselective membrane separating the anolyte and an aqueous catholyte. The electrolysis is effected in the presence of the salt to deposit silica hydrogel on the anode. The hydrogel can be easily recovered from the anode and dried to produce regular and inter- mediate density silica xerogels having narrow pore size distributions.

357748

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