Low oxygen overvoltage lead anodes

Details Low oxygen overvoltage lead anodes Low oxygen overvoltage lead anodes

1984-01-06

1985-10-22

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

502101, 4271266, C25B 1100

Patent

active

045486972

ABSTRACT:
Anodes made of lead or lead alloys, used for the evolution of oxygen from sulphuric acid solutions, particularly in metal electrowinning processes, are made more catalytic by treating them in an oxidizing bath of hydrated molten salts, in particular comprising highly oxidizing persalts or nitrates, of cobalt, iron and nickel.
After treatment, the anodes exhibit an extraordinary low oxygen overvoltage and allow a considerable saving of energy in comparison with untreated anodes.

REFERENCES:
patent: 3616323 (1971-10-01), Covitz
patent: 4142005 (1979-02-01), Caldwell
patent: 4345987 (1982-08-01), Fukasawa

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