Process for improving the purity of transition metals produced by electrolysis of halides thereof in a bath of molten salts
US4675084A · kind A · utility
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4Claims
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Assignee
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Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C7/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a process for improving the purity of transition metals produced by electrolysis of halides thereof in a bath of molten salts in a tank having a metal internal wall. The process is characterised in that a cathodic potential with respect to the anode of the cell is permanently imposed on the tank. It finds application in the production of metals such as in particular titanium, zirconium, hafnium, vanadium, niobium and tantalum, with a low proportion of oxygen and foreign metal elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.