Continuous production of 1,1,1,3,3,3-hexafluoropropane and 1-chloro-1,1,3,3,3-pentafluoropropane
US5811604A · kind A · utility
6Cited by
3References
23Claims
0Family size
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Key dates
| Filing date | Feb 5, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Feb 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/206
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the continuous production of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and/or 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa) in the liquid phase wherein the HFC-235fa and/or HFC-236fa serve as solvents for the reaction. When the reaction is conducted in the presence of a catalyst of SbF.sub.3, SbF.sub.5 or a mixture of SbF.sub.5 and HSO.sub.3 F, the reaction mass is unexpectedly less corrosive to the reaction vessel used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.