Production of alkali metal carbonates in a membrane cell

Details Production of alkali metal carbonates in a membrane cell Production of alkali metal carbonates in a membrane cell

1976-07-21

1978-03-21

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204 98, 204180P, C25B 114

Patent

active

040802701

ABSTRACT:
An alkali metal carbonate substantially free of alkali metal chloride is efficiently produced by electrolyzing an alkali metal chloride in an electrolytic cell having anolyte and catholyte compartments separated by a cation-exchange hydraulically impermeable membrane comprised of a thin film of a fluorinated polymer having pendant sulfononate groups and a cathode spaced apart from the membrane, injecting into the catholyte compartment of the cell carbon dioxide in a quantity sufficient to convert substantially all of the alkali metal hydroxide forming therein to the alkali metal carbonate salt, and utilizing a magnitude of electrolyzing current that reduces alkali metal chloride in the carbonate salt to less than 400 ppm.

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patent: 3179579 (1965-04-01), Heinemann et al.
patent: 3220941 (1965-11-01), Osborne
patent: 3374164 (1968-03-01), Bales et al.
patent: 3793163 (1974-02-01), Dotson
patent: 3897320 (1975-07-01), Cook
patent: 3899403 (1975-08-01), Cook et al.
patent: 3948737 (1976-04-01), Cook et al.
patent: 3976549 (1976-08-01), Falvo

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