Process for the manufacture of 1,1,1,2-tetrafluoroethane
US5334785A · kind A · utility
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Key dates
| Filing date | Jun 23, 1993 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jun 23, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/206
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process for the vapor phase fluorination, especially fluorination of 1,1,1-trifluoro-2-chloroethane (CFC-133a) with HF to produce 1,1,1,2-tetrafluoroethane (HFC-134a) employs a catalyst which preferably consists essentially of boehmite and Cr(OH)Cl.sub.2.2H.sub.2 O, combined and extruded to form particulates and then heated in nitrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.