Process for rapidly drying a wet, porous gel monolith

Details Process for rapidly drying a wet, porous gel monolith Process for rapidly drying a wet, porous gel monolith

1992-06-26

1993-09-14

Benner, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34218, F26B 304

Patent

active

052437698

ABSTRACT:
A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel in immersed in a liquid solvent in a chamber, and the liquid solvent 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.

REFERENCES:
patent: 4776867 (1988-10-01), Onorato et al.
patent: 4786618 (1988-11-01), Shoup
patent: 4849378 (1989-07-01), Hench et al.

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