Electrolysis of aqueous solution of potassium chloride

Details Electrolysis of aqueous solution of potassium chloride Electrolysis of aqueous solution of potassium chloride

C - Chemistry, Metallurgy

25

B

204/64.2

C25B 1/16 (2006.01) C01D 3/14 (2006.01) C25B 1/46 (2006.01) C25B 15/08 (2006.01)

Patent

CA 1149770

ABSTRACT: An electrolysis of an aqueous solution of potassium chloride is carried out by employing a fluorinated cation exchange membrane having an ion-exchange capacity of 0. 8 to 2. 0 meq/g dry polymer and having carboxylic acid groups as functional groups and maintain- ing a concentration of an aqueous solution of potassium hydroxide in a cathode compartment in a range of 20 to 45 wt.% and maintaining a calcium concentration in the aqueous solution of potassium chloride to lower than 0.05 mg/liter. The purification of the aqueous solution of potassium chloride to reduce the calcium concentration is carried out in a system com- prising a chelate ion-exchange substance.

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