Inorganic oxide aerogels and their preparation

Details Inorganic oxide aerogels and their preparation Inorganic oxide aerogels and their preparation

1983-12-27

1988-01-05

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Silicon containing or process of making

502235, 502236, 502343, 502355, B01J 2100, B01J 2306

Patent

active

047177080

ABSTRACT:
The invention is directed to inorganic oxide aerogels and the method of preparing such inorganic oxide aerogels which are characterized by high surface areas and high pore volume. The preparation comprises dissolving the inorganic alkoxide or metal salt in a solvent optionally containing a catalytic amount of an acid or base and hydrolyzing to form a gelled or colloidal material which is further treated with a fluid at or above its critical temperature and pressure to extract the solvent which is then dried to remove surface water.

REFERENCES:
patent: 2456576 (1948-12-01), Bodkin et al.
patent: 2469733 (1949-05-01), Kearby
patent: 3673111 (1972-06-01), Hovarth et al.
patent: 4436883 (1984-03-01), Witt
Preparation Of Silica Aerogel For Cherenkov Counters, by Poelz et al., (1982) pp. 491-503.

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