Process for the manufacture of hydrofluoroolefins
US8895788B2 · kind B2 · utility
1Cited by
15References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Jan 21, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C21/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for manufacturing 1,1,1,2-tetrafluoropropene (1234yf, CF3—CF═CH2) from 1,1,3,3-tetrachlororopropene (1230za, CCl2═CH—CHCl2) and/or 1,1,1,3,3-pentachloropropane (240fa, CCl3CH2CHCl2). The process comprises a step of isomerization of 1,1,3,3-tetrafluoropropene (1230za) to 1,1,2,3-tetrachloropropene (1230xa) followed by conversion of the 1,1,2,3-tetrachloropropene (1230xa) to 1,1,1,2-tetrafluoropropene (1234yf) via a hydrofluorination process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.