Production of alkali metal carbonate in a membrane cell...

Details Production of alkali metal carbonate in a membrane cell... Production of alkali metal carbonate in a membrane cell...

C - Chemistry, Metallurgy

25

B

204/59

C25B 1/14 (2006.01)

Patent

CA 1137023

PRODUCTION OF ALKALI METAL CARBONATE IN A MEMBRANE CELL HAVING A CONTIGUOUS MEMBRANE-CATHODE CONFIGURATION ABSTRACT OF THE DISCLOSURE An alkali metal carbonate is efficiently produced by electrolyzing an alkali metal chloride in an electrolytic cell having anolyte and catholyte compartments separated by a permselective cation-exchange hydraulically impermeable membrane juxtaposed con- tiguous to the cathode and introducing carbon dioxide into the catholyte in a quantity sufficient to convert substantially all of the alkali metal hydroxide forming in the catholyte compartment to alkali metal carbonate. Current efficiencies of 95-100% are attained even at high catholyte concentrations, and electrolyzing voltage is minimized.

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