Low oxygen overvoltage lead anodes

Details Low oxygen overvoltage lead anodes Low oxygen overvoltage lead anodes

1985-08-07

1986-08-05

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204119, 204129, 204290R, C25C 100, C25B 102

Patent

active

046041737

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 et al.
patent: 4345987 (1982-08-01), Fukasawa et al.
patent: 4459189 (1984-07-01), Vance et al.

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