Silica gel

Details Silica gel Silica gel

1979-10-01

1981-07-21

Williams, Howard S.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

204180P, 204101, 423338, C01B 3314, C25B 100, C25B 700

Patent

active

042798795

ABSTRACT:
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 or 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 intermediate density silica xerogels having narrow pore size distributions.

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