Process for oxidizing a metal of variable valence by constant cu

Details Process for oxidizing a metal of variable valence by constant cu Process for oxidizing a metal of variable valence by constant cu

1980-02-19

1981-07-21

Sebastian, Leland A.

Chemistry: electrical and wave energy

Processes and products

204 90, 204290F, C25C 122, C25B 100

Patent

active

042797055

ABSTRACT:
A process for oxidizing a metal of variable valence to a higher valence state by electrochemical means. More particularly, a process for oxidizing a metal of variable valence, such as, for example, uranium or vanadium contained in wet process phosphoric acid to a higher valence state for extraction by subsequent contact with complex organic extractants. The wet process phosphoric acid is oxidized in an electrolytic cell operated at a constant current density. The cell comprises a tank having at least one anode having a surface coating containing manganese dioxide and at least one cathode, said anode and cathode having a ratio of surface areas exposed to the electrolyte in said cell of from at least about 100:1.

REFERENCES:
patent: 2288752 (1942-07-01), Simpson
patent: 3361651 (1968-01-01), Parkinson et al.
patent: 3479139 (1969-11-01), Koerner
patent: 3616276 (1971-10-01), Schneider
patent: 3770612 (1973-11-01), Gray et al.
patent: 3836476 (1974-09-01), Baldwin et al.
patent: 4028215 (1977-06-01), Lewis et al.

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