Non-aged inorganic oxide-containing aerogels and their preparation
AssigneeStauffer Chemical Company
InventorsChung-Ping Cheng, Paul A. Iacobucci, Edward N. Walsh
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Abstract
The invention is directed to inorganic oxide-containing aerogels and the method of preparing such oxide-containing 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 the metal compound which is then further treated with a fluid at or above its critical temperature and pressure to extract the solvent.
Claims34
A method of preparing inorganic oxide-containing aerogels comprising:
- (a) hydrolyzing a compound comprising at least one metal dissolved in a solvent, to produce a gel;
- (b) contact the hydrolyzed compound with an extraction fluid above the critical temperature and pressure of the fluid to extract the solvent and optionally,
- (c) drying the gel.
The method of preparing inorganic oxide-containing aerogels comprising hydrolyzing a metal alkoxide dissolved in a solvent, contacting the hydrolyzed metal compound 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-containing aerogels comprising hydrolyzing a metal containing compound dissolved in a solvent, contacting the hydrolyzed metal compound 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.