Highly-active, finely divided super-dry silicon dioxide

Details Highly-active, finely divided super-dry silicon dioxide Highly-active, finely divided super-dry silicon dioxide

1975-07-10

1977-07-19

Stern, Edward

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, C01B 3316, C01B 3318

Patent

active

040369331

ABSTRACT:
A highly active superdry silica aerogel free of adsorbed water and hydrogen-bonded silanol groups the infrared spectrum of which is characterized by a single narrow intense band at about 3700 cm.sup..sup.-1 within the range between 4000 and 2000 cm.sup..sup.-1 indicating the presence of free silanol groups and which spectrum is further characterized by the absence of bonds indicating the presence of adsorbed water and hydrogen-bonded silanol groups, the said silica aerogel having been produced by subjecting a pyrolytically produced silica aerogel containing adsorbed water and both free and hydrogen-bonded silanol groups to treatment in a fluidized bed at a temperature between about 700.degree. and 1000.degree. C and at a pressure between 2 torrs and atmospheric pressure for a period between 1 second and a few minutes through which fluidized bed a stream of a dried gas that had been preheated to a temperature between 100.degree. and 300.degree. C was passed.

REFERENCES:
patent: 2660564 (1953-11-01), Davis
patent: 3053627 (1962-09-01), Flemmert
patent: 3148026 (1964-09-01), Roderburg et al.
patent: 3269799 (1966-08-01), Gunn, Jr.
patent: 3367742 (1968-02-01), Marotta et al.
patent: 3645684 (1972-02-01), De Cuir
patent: 3859420 (1975-01-01), Laufer et al.
Book, "The Colloid Chem. of Silica and Silicates", by Ralph K. Iler, 1955 Ed., pp. 152, 153, Cornell Univ. Press, N. Y.

Affiliated with

Also associated with

Rating

Highly-active, finely divided super-dry silicon dioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Highly-active, finely divided super-dry silicon dioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Highly-active, finely divided super-dry silicon dioxide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2293371