Inorganic phosphate aerogels and their preparation
AssigneeStauffer Chemical Company
InventorPaul A. Iacobucci
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Abstract
The invention is directed to inorganic phosphate aerogels and the method of preparing such inorganic phosphate aerogels which are characterized by high surface areas and high pore volume. The preparation comprises reacting an inorganic alkoxide or metal salt with a phosphate 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.
Claims30
A method of preparing inorganic phosphate aerogels comprising:
- (a) reacting in a solvent medium, a compound comprising at least one metal with a source of phosphate ions to produce a gel;
- (b) contacting the gel with a fluid above the critical temperature and pressure of the fluid until the solvent is extracted.
The method of preparing inorganic phosphate aerogels comprising reacting in a solvent a metal alkoxide with a phosphate to produce a gel with an extraction fluid at not less than the critical temperature and pressure of the extraction fluid such that solvent is extracted and drying the gel to obtain the dried aerogel product.
A method of preparing inorganic phosphate aerogels comprising reacting in a solvent a metal containing compound with a phosphate to produce a gel, and contacting the gel with an extraction fluid at not less than its critical temperature and pressure such that solvent is extracted, drying the gel to obtain the dried aerogel product.
Dependencies are inferred from the claim text.