Electrolytic production of high purity alkali metal hydroxide

Details Electrolytic production of high purity alkali metal hydroxide Electrolytic production of high purity alkali metal hydroxide

1977-02-16

1981-10-27

Lefevour, Charles F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204263, 204269, 204275, 204296, C25B 900

Patent

active

042971942

ABSTRACT:
Concentrated alkali metal hydroxide substantially free of alkali metal halide and other impurities is produced by the electrolysis of an alkali metal halide solution in an electrolytic cell having a dimensionally stable anode and a metal cathode separated by an electrically conductive stable selectively permeable hydrated cation ion-exchange membrane film of a fluorinated copolymer having pendant sulfonic acid groups or derivatives of such groups. The membrane film is capable of use at high temperatures and under severely corrosive chemical conditions for extended periods without degradation.

REFERENCES:
patent: 1926591 (1933-09-01), Loddesol
patent: 2967807 (1961-01-01), Osborne et al.
patent: 3282875 (1966-11-01), Connolly et al.
patent: 3312614 (1967-04-01), Schick
patent: 3657104 (1972-04-01), Hodgdon, Jr.
patent: 3694281 (1972-09-01), Leduc
"XR Perfluorosulfonic Acid Membrane", New Product Info. from R & D Division-Plastics Dept. 10-1-69.

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