Process for the preparation of alkali metal dichromates and...

Details Process for the preparation of alkali metal dichromates and... Process for the preparation of alkali metal dichromates and...

C - Chemistry, Metallurgy

25

B

204/59, 204/63

C25B 1/14 (2006.01) C25B 1/22 (2006.01) C25B 1/28 (2006.01)

Patent

CA 2013782

ABSTRACT OF THE DISCLOSURE A process for the preparation of alkali metal dichromates and/or chromic acid by electrolysis of alkali metal monochromate and/or alkali metal dichromate solution in electrolysis cells, the anode and cathode compartments of which are separated by cation exchange membranes, wherein the cation exchange membranes are single-layer membranes based on perfluorinated polymers having sulfonic acid groups as cation exchange groups, and an aqueous solution having a pH of 4 to 14 is produced in the cathode compartment of the cells.

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