Production of porous diaphragms

Details Production of porous diaphragms Production of porous diaphragms

C - Chemistry, Metallurgy

08

J

18/19, 204/201,

C08J 9/26 (2006.01) C25B 1/46 (2006.01) C25B 13/08 (2006.01)

Patent

CA 1124019

ABSTRACT OF THE DISCLOSURE A method of manufacturing a porous diaphragm of an organic polymeric material, e.g. of polytetrafluoroethylene, suitable for use as a diaphragm in an electrolytic cell, the method comprising forming a sheet of organic polymeric ma- terial containing particulate dextrin, for example by heating a starch-containing sheet, optionally in the presence of acid, to convert the starch in the sheet to dextrin, and extracting the dextrin from the sheet, for example by contacting the sheet with caustic alkali and/or with alkali metal hypochlorite.

315612

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