Poly(silicic acid)

Details Poly(silicic acid) Poly(silicic acid)

1978-12-22

1980-10-28

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, 423338, 252449, 252451, C01B 3314

Patent

active

042306795

ABSTRACT:
Particulate, porous, water-insoluble amorphous poly(silicic acid) which is characterized by an average pore diameter of at least 100 A and a surface area of 500 to 850 m.sup.2 /g, by an average pore diameter of 50 A to about 300 A and a surface area of greater than 850 m.sup.2 /g, or by a pore volume of 1.5 ml/g to about 8.5 ml/g and a surface area of greater than 850 m.sup.2 /g; process for preparing particulate, porous, water-insoluble, amorphous poly(silicic acid) by acidifying an appropriate aqueous silicate solution, allowing the silicic acid thus formed to polymerize to poly(silicic acid), freezing the acidified solution, and thereafter thawing the acidified solution and isolating therefrom, washing, drying and recovering particulate poly(silicic acid), said process further characterized in that:

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