Process for the manufacture of hydrochlorofluoroolefins
US8642819B2 · kind B2 · utility
4Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2009 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Apr 11, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/383
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for the manufacture of trans 1-chloro-3,3,3-trifluoropropene (E-1233zd). The first step of the process comprises the fluorination of 1,1,3,3-tetrachlororopropene (1230za, CCh═CH—CHCh) and/or 1,1,1,3,3-pentaachloropropane (240fa) to a mixture of cis 1233zd (Z-1233zd) and trans 1233zd (E-1233zd). The second step of the process comprises a separation of the mixture formed in the first step to isolate cis 1233zd (Z-1233zd) from the mixture. The third step of the process comprises isomerization of cis 1233zd (Z-1233zd) to trans 1233zd (E-1233zd).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.