Synthesis of 1,1-dichloro-1,2,2,2-tetrafluoroethane
US5055624A · kind A · utility
6Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/206
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to the selective manufacture of 1,1-dichloro-1,2,2,2-tetrafluoroethane by catalytic fluorination of 1,1,1-trichloro-2,2,2-trifluoroethane with anhydrous hydrofluoric acid. The reaction is carried out in the liquid phase at a temperature of between 70.degree. and 170.degree. C. and under a pressure of between 10 and 80 bars absolute, in the presence of an antimony-containing catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.