Process for producing perfluorocarboxylic acid fluoride
US5399754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1994 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Apr 26, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of producing a perfluorocarboxylic acid fluoride having the formula (1): ##STR1## wherein n is an integer of at least 2, comprising effecting oligomerization of hexafluoropropylene oxide in the presence of an alkali metal fluoride a sulfone or a mixture of a sulfone with an ether having the formula (2): EQU CH.sub.3 O(CH.sub.2 CH.sub.2 O).sub.m CH.sub.3 (2) where m is an integer of 2 to 6. This process makes it possible to improve production yield of hexafluoropropylene oxide oligomers remarkably, and to raise a reaction temperature for the oligomerization, as compared with conventional methods, thereby shortening reaction time therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.