Production of alkali metal carbonates in a cell having a carboxy

Details Production of alkali metal carbonates in a cell having a carboxy Production of alkali metal carbonates in a cell having a carboxy

1977-07-19

1979-04-03

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204 98, 204296, C25B 114

Patent

active

041475992

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 carboxylic acid or alkali metal carboxylate 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 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 catholyte solids to less than 400 ppm.

REFERENCES:
patent: 2967807 (1961-01-01), Osborne et al.
patent: 3374164 (1968-03-01), Bales et al.
patent: 3899403 (1975-08-01), Cook et al.
patent: 3976549 (1976-08-01), Falvo

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