Process for producing 2,3,3,3-tetrafluoropropene
US9359273B2 · kind B2 · utility
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29Claims
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Key dates
| Filing date | Oct 11, 2012 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Oct 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C21/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates, in part, to the discovery that the presence of impurities in 1,1,2,3-tetrachloropropene (1230xa) results in catalyst instability during the fluorination of 1230xa to 2-chloro-3,3,3-trifluoropropene. By substantially removing the impurities, it is shown that the catalyst life is extended and results in improved operation efficiency of the fluorination reaction. Such steps similarly result in an overall improvement in the production of certain hydrofluoroolefins, particularly 2,3,3,3-tetrafluoropropene (1234yf).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.