Process for oxidizing a metal of variable valence by controlled potential electrolysis
US4243494A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1979 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Apr 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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 controlled potential via use of a reference electrode. The cell comprises a tank having at least one anode 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.