Separation of volatile impurities from aluminum chloride before electrolysis
US4576690A · kind A · utility
5Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Separating volatile impurities from AlCl.sub.3 by supplying impure AlCl.sub.3 into a molten salt bath of a gas separation compartment in an electrolysis cell. The impurities are removed from the compartment and molten salt bath containing dissolved AlCl.sub.3 is carried under a partition into a chamber where the AlCl.sub.3 is electrolyzed. In a preferred embodiment, desublimation is avoided by supplying AlCl.sub.3 to the bath as a gas rather than in solid form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.