Silica production

Details Silica production Silica production

1975-09-15

1981-01-20

Michl, Paul R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252454, 252458, 423326, 423339, 526 96, 526106, B01J 2108

Patent

active

042461391

ABSTRACT:
A method of producing silica compositions from hydrogels in which the hydrogel is washed in a first water-soluble organic liquid to remove a principal portion of the water. The washed composition is then washed in at least one second water-soluble organic liquid and the second organic liquid is removed from the composition by venting the second organic liquid from the composition at a temperature above the critical temperature of the second organic liquid to produce a silica composition.

REFERENCES:
patent: 2188007 (1940-01-01), Kistler
patent: 2563606 (1951-08-01), Kimberlin, Jr. et al.
patent: 3434912 (1969-03-01), Peri
patent: 3862104 (1975-01-01), Witt
patent: 3875079 (1975-04-01), Witt
patent: 3900457 (1975-08-01), Witt
patent: 4119569 (1978-10-01), Dietz

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