Process for the preparation of supported anisotropic...

Details Process for the preparation of supported anisotropic... Process for the preparation of supported anisotropic...

C - Chemistry, Metallurgy

08

J

117/88.5

C08J 9/28 (2006.01) B01D 69/10 (2006.01) B01D 71/56 (2006.01) C08G 69/26 (2006.01)

Patent

CA 1076427

ABSTRACT OF THE DISCLOSURE: Supported anisotropic reverse osmosis membrane based on synthetic polyamides are prepared by first preparing a support therefor by treating a material suited for serving as a support for a polyamide membrane, with a heat resistant water soluble polymer which is insoluble in the polar solvents to be used for preparing the polyamide solution described below; preparing a solution of the polyamide in an organic polar solvent, in the presence of a saline compound; spreading the thus prepared polyamide solution onto the prepared support; partially evaporating the solvent by heating; coagulating the membrane in an aqueous medium; and optionally, thermally treating the membrane.

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