Integrated process to co-produce trans-1-chloro-3,3,3-trifluoropropene and trans-1,3,3,3-tetrafluoropropene
US8426656B2 · kind B2 · utility
18Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2010 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Dec 18, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The disclosed integrated manufacturing process includes a combined liquid phase reaction and purification operation which directly produces trans-1-chloro-3,3,3-trifluoropropene and 3-chloro-1,1,1,3-tetrafluoropropane which is a precursor to the manufacture of trans-1,3,3,3-tetrafluoropropene. The mixture of co-products is easily separated by conventional distillation and 3-chloro-1,1,1,3-tetrafluoropropane is then dehydrochlorinated to produce trans-1,3,3,3-tetrafluoropropene by contacting in the liquid phase with a caustic solution or in the vapor phase using a dehydrochlorination catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.