Process for preparing fluorinated aliphatic compounds
US6063970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Oct 8, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/087
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for the preparation of a chlorofluoro aliphatic hydrocarbon having the formula EQU CH.sub.a F.sub.3-a --CH.sub.2 --CH.sub.c Cl .sub.3-c-b F.sub.b wherein a and c are 0 or the integer 1 or 2 and b is the integer 1, 2 or 3. The process comprises reacting a chlorinated fluoroolefinic hydrocarbon of the formula EQU CH.sub.a F.sub.3-a --CH.dbd.CH.sub.c Cl.sub.2-c wherein a and c are as previously described, with anhydrous hydrogen fluoride and a is as described previously. This reaction is catalyzed with a compound that is a metal oxide or metal halide. The metallic part of such compound is arsenic, antimony, tin, boron or is selected from a metal in Group IVb, Vb, VIb, VIIb or VIIIb of the Periodic Table of the Elements. The desired chlorofluoro aliphatic hydrocarbon is then recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.