Electrolysis of alkali metal sulfates

Details Electrolysis of alkali metal sulfates Electrolysis of alkali metal sulfates

C - Chemistry, Metallurgy

25

B

204/64.1

C25B 1/16 (2006.01) B01D 61/44 (2006.01) B01D 61/52 (2006.01) C25B 1/10 (2006.01) C25B 1/22 (2006.01)

Patent

CA 2038830

Abstract of the Disclosure: Alkali metal sulfates are electrolyzed to more concentrated solutions of alkali metal hydroxide and sulfuric acid by using a three- compartment electrodialysis cell at temperatures of ? 70 to ? 150°C and current densities of from 0.5 to 15 kA/m2 using an anion exchange membrane whose polymeric ion exchange matrix comprises a styrene/divinylbenzene copolymar containing very strongly basic quaternary ammonium groups and a hydronium ion blocker, on whose central compartment side is an ion exchange layer or membrane containing tertiary or secondary amino groups.

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