Chemistry: electrical and wave energy – Processes and products
Patent
1977-10-05
1979-03-13
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204 93, C25B 128
Patent
active
041441443
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.sup.+ and NH.sub.4.sup.+ values, and the electric current density is at least 0.5 amperes per square centimeter of platinum surface of the anode.
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McCarthy Michael J.
Radimer Kenneth J.
Fellows Charles C.
FMC Corporation
Ianno Frank
Tung T.
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