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

1980-03-11

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, C25B 116, C25B 126

Patent

active

041927257

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: 2967807 (1961-01-01), Osborne et al.
patent: 2978401 (1961-04-01), Hoch et al.
patent: 3257334 (1966-06-01), Chen et al.
patent: 3282875 (1966-11-01), Connolly et al.
patent: 4025405 (1977-05-01), Dotson et al.
"XR Perfluorosulfonic Acid Membranes", New Product Info., E. I. DuPont, pp. 1-4, 1969. _

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