Method for the preparation of 2 chloro 1,1,1,2,3,3,3 heptafluoropropane
US8367879B2 · kind B2 · utility
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Key dates
| Filing date | Nov 10, 2008 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Jan 6, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of catalytically converting 2,2, dichlorohexafluoropropane (HFC-216aa) into 2 chloro 1,1,1,2,3,3,3 heptafluoropropane (HFC-217ba) including the step of exposing the 2,2 dichlorohexafluoropropane to a chromium-containing catalyst comprising a metal oxide, a halogenated metal oxide or a metal oxyhalide, which chromium-containing catalyst comprises 0.01% to 5.0% by weight zinc or a compound of zinc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.