Manufacturing method for hexafluorocylobutene and hexafluorocyclobutane
US5763703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/354
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Manufacturing method for hexafluorocyclobutene in which 1,2-dichlorohexafluorocyclobutane is dechlorinated using hydrogen in the presence of a metal oxide and/or silicon oxide catalyst. Manufacturing method for (Z)-1,2,3,3,4,4-hexafluorocyclobutane which carries out the hydrogen-adding reaction (hydrogen reduction) of the raw material, 1,2-dichlorohexafluorocyclobutane, in the presence of a rhodium catalyst, or which carries out vapor-phase hydrogen reduction of hexafluorocyclobutene in the presence of a palladium catalyst. Using this manufacturing method, hexafluorocyclobutene can easily be derived in a single step with high selectivity from 1,2-dichlorohexafluorocyclobutane which can be obtained readily and at a low cost. This method also produces a high yield of (Z)-1,2,3,3,4,4-hexafluorocyclobutane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.