Process for the preparation of hexafluoropropene epoxide
US4014762A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Dec 18, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B3/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hexafluoropropene epoxide ##STR1## is prepared by anodic oxidation of hexafluoropropene in an electrolytical cell which contains at least in the anode space as electrolyte a solution of the following composition: glacial acetic acid and/or acetonitrile with from 2 - 40% by volume of water and about 1 - 10 weight % -- calculated on the total solution -- of at least one alkali perchlorate, -hexafluorosilicate, -tetrafluoroborate, -hexafluorophosphate or -nitrate and/or of at least one of the free acids on which these salts are based as compounds emphasizing the conductance. The anode consists of a metal of the platinum group of the periodical table or of an alloy of these metals or of PbO.sub.2, the cathode consisting of one of the usual metals or of graphite. If cathode space and anode space are separated, catholyte and anolyte are either of the same kind or the catholyte is one of the usual electrolytes. The cell temperature should range from about -30 to +50.degree. C. Hexafluoropropene epoxide is employed for preparing polymers which are especially important as inert liquids, lubricant liquids and hydraulic liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.