Methods to produce 3,3,3-trifluoropropene
US8373010B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | May 27, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/354
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of 3,3,3-trifluoropropene comprising the steps of; (1) fluorination of 240fa to form 245fa; (2) conversion of 245fa to a cis/trans mixture of 1234ze; (3) hydrogenation of the cis/trans mixture of 1234ze to form 254fb ; and (4) dehydrofluorination of 254fb to produce 3,3,3-trifluoropropene. Alternatively or additionally, a second process for the preparation of the desired compound comprises the following steps; (1) fluorination of HCC-240fa to form HCFC-244fa; (2) conversion of 244fa to a cis/trans mixture of HFO-1234ze; (3) hydrogenation of the cis/trans mixture of 1234ze to form HFC-254fb; and (4) dehydrofluorination of 254fb to produce 3,3,3-trifluoropropene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.