Method for preventing degradation in activity of a low hydrogen overvoltage cathode
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsYasushi Samejima, Minoru Shiga, Toshiji Kano, Takamichi Kishi
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Abstract
Disclosed is a method for preventing a low hydrogen overvoltage cathode from degradation in activity characterized by adding a reducing agent to a cathode compartment of an electrolytic cell which electrolysis an aqueous alkali metal halide solution. According to the invention, no degradation takes place even after repeated shutdown of operation.
Claims5
A method of preventing degradation in activity of a low hydrogen overvoltage cathode in an electrolytic cell in the electrolysis of an aqueous alkali metal halide, said electrolytic cell being partitioned by an asbestos diaphragm or an ion exchange membrane into an anode compartment containing an anolyte and a cathode compartment containing a catholyte and being equipped with a low hydrogen overvoltage cathode, said method comprising adding a reducing agent to said catholyte during shutdown of the cell.
Dependencies are inferred from the claim text.