Preparation of composite silica membranes with thermal stability by a soaking-rolling method
AssigneeKorea Research Institute of Chemical Technology
InventorsKew-Ho Lee, Dong-Wook Lee, Yoon-Kyu Lee, Bong-Kuk Sea, Seung-Eun Nam
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Abstract
The present invention relates to a method for preparing a composite silica membrane with thermal stability by a soaking-rolling method, and more particularly to a method for preparing a composite silica membrane with improved thermal stability by rolling the surface of a porous support with silica xerogel, soaking-rolling the surface with γ-alumina, coating, drying, and sintering the porous support surface, thereby forming a fine coating membrane on the porous support surface.
Claims8
A method for preparing a composite silica membrane comprising the following steps of:
- (a) a primary modification of surface of a porous support, wherein silica xerogel is penetrated into said porous support surface by pressing and then sintered;
- (b) a secondary modification of said primarily modified surface of said porous support by soaking said primarily modified surface with γ-alumina sol via a soaking-rolling method, followed by drying and sintering;
- and
- (c) formation of a coating membrane by soaking said primarily and secondarily modified surface with a surface coating material in sol phase by a soaking-rolling method, followed by drying and sintering.
Dependencies are inferred from the claim text.