Process and apparatus for rapidly drying a wet, porous gel...

Details Process and apparatus for rapidly drying a wet, porous gel... Process and apparatus for rapidly drying a wet, porous gel...

C - Chemistry, Metallurgy

03

B

C03B 8/00 (2006.01) C03B 19/12 (2006.01) F26B 3/04 (2006.01) F26B 5/00 (2006.01) F26B 7/00 (2006.01) F26B 21/14 (2006.01)

Patent

CA 2136222

A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical tem- peratures without inducing any cracking of the gel. The wet gel is immersed in a liquid solvent in a chamber, and the liquid sol- vent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

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