Electrolytic cell utilizing pretreated semi-permeable membranes

Chemistry: electrical and wave energy – Apparatus – Electrolytic

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204283, 204296, C25B 1302, C25B 1308, C25B 900, C25B 134

Patent

active

041244770

ABSTRACT:
An electrolytic cell suitable for use in electrolyzing ionizable chemical compounds, particularly alkali metal halide brines and hydrohalic acids, which comprises a cell body having an anode compartment containing a porous anode and a cathode compartment containing a cathode said compartments being separated from each other by a prestretched, taut membrane barrier which is substantially impervious to gases and liquids and which is selected from a hydrolyzed copolymer of a perfluorinated hydrocarbon and a sulfonated perfluorinated hydrocarbon and a sulfonated perfluorovinyl ether, and a sulfostyrenated perfluorinated ethylene propylene polymer, said barrier being pretreated by hydrolyzing and stretching prior to insertion in the cell.
Such cells can be operated at constant low voltage, and are not subject to erratic operating voltages which are due, in part at least, to the accumulation of gases between the anode and diaphragm.

REFERENCES:
patent: 3116355 (1963-12-01), Oswin
patent: 3657104 (1972-04-01), Hodgin
patent: 3773634 (1973-11-01), Stacey et al.
patent: 3852135 (1974-12-01), Cook et al.
patent: 3905879 (1975-09-01), Eng et al.
Prefluorinated Ion Exchange Membranes by Grot et al., 6 pp., Delivered Electrochem. Soc. Meeting, Houston 5/72.

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