Inorganic oxide aerogels and their preparation
AssigneeStauffer Chemical Company
InventorsChung-Ping Cheng, Paul A. Iacobucci
Life of this patent
Estimating the term…
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.
Claims35
A method of preparing inorganic oxide aerogels comprising:
- (a) hydrolyzing a compound comprising at least one metal dissolved in a solvent, to produce a gel;
- (b) ageing the gel produced;
- (c) contacting the aged gel in an autoclave with a fluid above the critical temperature and pressure of the fluid to extract the solvent;
- and
- (d) drying the gel.
The method of preparing inorganic oxide aerogels comprising hydrolyzing a metal alkoxide dissolved in a solvent to produce a gel, ageing the gel and contacting the aged gel in an autoclave with an extraction fluid at not less than the critical temperature and pressure of the extraction fluid such that the solvent is extracted and drying the gel to obtain the dried aerogel product.
A method of preparing inorganic oxide aerogels comprising hydrolyzing a metal containing compound dissolved in a solvent to produce a gel, ageing the gel and contacting the aged gel in an autoclave with an extraction fluid at not less than its critical temperature and pressure such that the solvent is extracted, drying the gel to obtain the dried aerogel product.
Dependencies are inferred from the claim text.