Precious metal refining with fluorine gas
US5076839A · kind A · utility
1Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Jun 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Feed mixtures containing one or more platinum group metals are fluorinated to form at least one volatile fluoride product which is separated from the residual solid. Separations of different fluorides may be effected by collecting different fractions of volatile fluorides. Palladium does not form a volatile fluoride and is retained in the residual solid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.