Composite ion exchange membranes

Details Composite ion exchange membranes Composite ion exchange membranes

C - Chemistry, Metallurgy

25

B

204/156, 204/202

C25B 1/46 (2006.01) C25B 13/04 (2006.01) C25B 13/08 (2006.01)

Patent

CA 1203509

ABSTRACT OF THE DISCLOSURE A composite, substantially completely fluorinated film containing ion exchange groups and its use as an ion exchange membrane in an electrolytic cell is described. The membranes are comprised of at least two layers wherein each layer contains sulfonyl ion exchange groups the equivalent weight of the two layers differing by more than 250, at least one layer having an equivalent weight of less than 1000. The higher equivalent weight layer should face the cathode in an electrolytic cell.

443987

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