Process and cell for the preparation of polyvalent metals such as Zr or Hf by electrolysis of molten halides
US4443306A · kind A · utility
4Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1981 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Nov 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The electrolysis cell according to the invention is concerned with the preparation of Zr or Hf by electrolysis, from a molten mixture of alkali metal or alkaline earth chlorides and fluorides. It comprises a graphite collector which defines the anodic space and which is extended at the lower end below the level of the electrolyte by a metal wall made of metal to be deposited or coated with said metal. The wall may advantageously be made in the form of a porous diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.