Production of ion-exchange membrane

Details Production of ion-exchange membrane Production of ion-exchange membrane

C - Chemistry, Metallurgy

08

J

18/13

C08J 5/22 (2006.01)

Patent

CA 1242555

Abstract Production of Ion Exchange Membrane A method of increasing the surface area per unit weight of an ion-exchange membrane in which the membrane in the form of a sheet is expanded by dry stretching in order to effect the increase in surface area per unit weight and in which the membrane comprises an organic polymeric material having a plurality of fixed anionic groups associated with cations at least some of which comprise an organic group or a plurality of organic groups. A membrane having the defined cations is particularly susceptible of expansion by stretching to produce a membrane which remains taut and unwrinkled when used in an electrolytic cell. Use of the expanded membrane results in a decreased cell voltage.

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