Lignyte Co., Ltd.

Dow Corning Toray Silicone Company Limited

Yoshiaki Tanaka

Tadashi Uragami

Masaru Ozaki

Tatsuya Nakamura

A process of fabricating a porous silicone product utilizing a silicone emulsion capable of forming an elastomer by removal of water therefrom. The silicone emulsion comprises a water emulsion of an organopolysiloxane, a cross-linking agent, and a curing catalyst. The process comprises the steps of freezing the silicone emulsion, and drying the frozen silicone emulsion, whereby water is sublimed therefrom and the porous silicone product is obtained. The resulting porous silicone product is best utilized as a selective permeable membrane for separation of a liquid component from a liquid solution containing two or more liquid components.

Process for fabricating porous silicone product

An improved method for separating a particular liquid component from a solution containing two or more liquid components. The method employs a vessel divided into a solution chamber and a vacuum chamber by a permeable membrane which is a porous membrane exhibiting a superior affinity to the particular component intended to be separated than to the other components. The solution is placed in the solution chamber out of direct contact with the permeable membrane at which condition a vacuum is applied to the vacuum chamber to evaporate the solution in the chamber and draw the resulting vapors through the permeable membrane into the vacuum chamber, thereby collecting the particular component from the solution in a vapor-to-vapor permeation through the permeable membrane.

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Takaishi, Japan

Yoshiaki Tanaka