Electrolytic production of sodium persulfate

Details Electrolytic production of sodium persulfate Electrolytic production of sodium persulfate

C - Chemistry, Metallurgy

25

B

204/58

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

Patent

CA 1090286

ABSTRACT: Preparation of sodium persulfate in an electrolytic cell having a protected cathode is obtained by the direct electrolysis of aqueous anolyte solution in which there is initially dissolved a sufficient amount of a mixture of sulfates and peroxydisulfates of sodium and ammonium to provide an anolyte feed solution containing by weight 5 to 9% sodium ions, 12 to 30% sulfate ions, 1 to 4% ammonium ions, an effective amount of a polarizer, and optionally up to 20% peroxydisulfate ions. The cell catholyte is a sulfuric acid solution, which may contain Na+ and NH? values, and the electric current density is at least 0.5 amperes per square centimeter of platinum surf ace of the anode.

291995

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