Method for manufacturing 1,1,1,3,3-pentafluoropropene
US5728902A · kind A · utility
11Cited by
1References
8Claims
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Key dates
| Filing date | Aug 14, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Aug 14, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/363
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for manufacturing 1,1,1,3,3-pentafluoropropene comprises the steps of adding 2-trifluoromethyl-3,3,3-trifluoropropionic acid under the presence of metal carbonate and/or metal hydrogencarbonate in an aprotic solvent at reaction temperature particularly from 40.degree. C. to 80.degree. C., of refining resulting reaction products to obtain 1,1,1,3,3-pentafluoropropene, and further of coexisting a desiccating agent therein. According to the method, 1,1,1,3,3-pentafluoropropene can be manufactured through industrially efficient and cost-effective way using 2-trifluoromethyl-3,3,3-trifluoropropionic acid as a raw material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.