Process for the manufacture of 1,3,3,3-tetrafluoropropene
US7592494B2 · kind B2 · utility
18Cited by
5References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2003 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Mar 9, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J21/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides an economic process for the manufacture of 1,3,3,3-tetrafluoropropene (HFC-1234ze) by a two stage process. A hydrofluorination of 1-chloro-3,3,3-trifluoropropene (HCFC-1233zd) into 1-chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa) and 1,1,1,3,3-pentafluoropropane (HFC-245fa) is conducted, followed by the dehydrochlorination of HCFC-244fa and dehydrofluorination of HFC-245fa into HFC-1234ze.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.