Cation-exchange membrane for electrolyzing alkali metal halide

Details Cation-exchange membrane for electrolyzing alkali metal halide Cation-exchange membrane for electrolyzing alkali metal halide

1982-04-30

1984-02-14

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1308

Patent

active

044315040

ABSTRACT:
A cation-exchange membrane for electrolyzing an aqueous solution of an alkali metal halide in the manufacture of an alkali hydroxide and a halogen. The membrane comprises one layer which occupies 5 to 30% of the total thickness of the membrane and has carboxylic acid groups; another layer which occupies 5 to 30% of the membrane thickness and has weakly acidic groups, the weakly acidic groups occupying 10 to 60% of the total exchange group capacity of the layer; and a further layer which has sulfonic acid groups occupying the middle portion of the membrane.

REFERENCES:
patent: 4147599 (1979-04-01), O'Leary et al.
patent: 4165248 (1979-08-01), Darlington et al.
patent: 4166014 (1979-08-01), Sata et al.
patent: 4178218 (1979-12-01), Seko

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