Method of forming particles using a supercritical fluid and...

Details Method of forming particles using a supercritical fluid and... Method of forming particles using a supercritical fluid and...

B - Operations, Transporting

01

J

B01J 13/00 (2006.01)

Patent

CA 2263805

A method for providing aerogels, and aerogels produced according to the method, is described. The method involves contacting a solution containing material to be processed with a species selected to precipitate the material and selected so as to be miscible with the solvent system of the solution. After the material is precipitated, the material may be washed with the precipitating species until it is substantially free of solvent system. Then, the precipitating species containing the material precipitate is taken above its critical point, and the supercritical fluid is exhausted above its critical temperature. Alternately, a separate isolating species is introduced to displace the precipitating species, or the precipitating species/solvent system mixture. The isolating species then is taken above its critical point, and exhausted above its critical temperature. The invention provides for batch or continuous processes.

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