Electrolytic cell ion-exchange membranes

Details Electrolytic cell ion-exchange membranes Electrolytic cell ion-exchange membranes

1981-03-04

1983-03-08

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1308

Patent

active

043760309

ABSTRACT:
Electrolytic cell ion-exchange membranes, comprising fluoropolymers having pendant sulfonic acid functional groups and/or carboxylic acid functional groups, are treated with primary, secondary, and/or tertiary amines to provide dimensional stability and other improvements to the membranes. The treatment with amines provides easily-disassociable amines salts which are leached out by an aqueous leachant, e.g., cell electrolyte, thereby providing sulfonic acid groups and/or carboxylic acid groups to function as ion exchange sites in the membrane during subsequent cell operation.

REFERENCES:
patent: 3654125 (1972-04-01), Leitz
patent: 3657104 (1972-04-01), Hodgdon
patent: 3969285 (1976-07-01), Grot
patent: 4225400 (1980-09-01), Gunjima et al.
patent: 4246041 (1981-01-01), Murayama et al.

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