Silica xerogel production

Details Silica xerogel production Silica xerogel production

1974-02-25

1976-04-20

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252451, 252458, 423335, B01J 2900, B01J 2108, C01B 3312

Patent

active

039518639

ABSTRACT:
A method of converting a hydrogel to a xerogel by passing a hydrogel and an organic liquid in which water is soluble in countercurrent contact to remove the water from the hydrogel. The solution of organic liquid and water which is formed is allowed to separate into two phases and the organic liquid is recycled back into contact with the hydrogel.

REFERENCES:
patent: 1413457 (1922-04-01), Collins
patent: 2967833 (1961-01-01), Kimberlin, Jr.
patent: 3622521 (1971-11-01), Hogan et al.

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