Method for producing sulfur hexafluoride
US5639435A · kind A · utility
6Cited by
6References
18Claims
0Family size
Inventor
Key dates
| Filing date | Oct 23, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Oct 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/453
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is directed to methods for preparing sulfur hexafluoride by reacting sulfur tetrafluoride with oxygen. The sulfur tetrafluoride is prepared by contacting molten sulfur with a metal fluoride to produce sulfur tetrafluoride and a metal sulfide. In a preferred method, the metal fluoride is regenerated from the metal sulfide by reacting the metal sulfide with hydrofluoric acid in the presence of oxygen. The preferred metal fluorides are the fluorides of copper, silver, mercury and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.