Process for preparing perfluoroalkoxysulphonic compounds
US5374770A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/168
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a process for preparing perfluoroalkoxysulphonic compounds having formula: ##STR1## wherein R.sub.f represents a perfluoroalkyl or perfluoroethereal group, X represents F, OH or OM, in which M is an alkaline cation, an alkaline-earth cation, or X represents NR.sub.1 R.sub.2, in which R.sub.1 and R.sub.2, independently of each other, represent H or an alkyl group containing from 1 to 5 carbon atoms and p is a number selected from 1 to 2, characterized in that the perfluoro vinyl sulphonyl fluoride of formula (II) CF.sub.2 =CF--SO.sub.2 F is reacted with a hypofluorite of formula (III): EQU R.sub.f (OF).sub.r (III) wherein R.sub.f is the same as defined above, and r represents 1 or 2, optionally in an inert solvent, at a temperature approximately ranging from -140.degree. C. to +40.degree. C., and in that, if so desired, from the compound of formula (I) so obtained in which X=F, the corresponding derivatives, in which X has the other meaning as defined above, are obtained by means of conventional techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.