Process for the manufacture of 1,1,1,2-Tetrafluoroethane
US5731481A · kind A · utility
17Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/206
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the manufacture of 1,1,1,2-tetrafluoroethane (F134a) by gas-phase catalytic fluorination of 1-chloro-2,2,2-trifluoroethane (F133a). A mixed catalyst is employed, composed of nickel and chromium oxides, halides and/or oxyhalides deposited on a support consisting of aluminium fluoride or of a mixture of aluminium fluoride and alumina. This mixed catalyst makes it possible to obtain an excellent selectivity for F134a with a high production efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.