Process for the manufacture of pentafluoroethane
US5962753A · kind A · utility
2Cited by
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6Claims
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Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/21
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the manufacture of pentafluoroethane HFC 125! by reaction of perchloroethylene with hydrogen fluoride in the vapor phase over a fluorination catalyst in a fluorination reactor with recycle of dichlorotrifluoroethane HCFC 123! and chlorotetrafluoroethane HCFC 124! to the fluorination reactor, wherein tetrafluoroethane HFC 134a! is also recycled to the fluorination reactor. The tetrafluoroethane and the chlorotetrafluoroethane can both be separated from the product stream in a single distillation column and recycled, together to the fluorination reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.