Process to manufacture 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb)
US8664455B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jul 30, 2009 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Mar 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C21/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides an improved process to manufacture 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) by reacting 2-chloro-3,3,3,-trifluoropropene (HCFO-1233xf) with hydrogen fluoride, in a liquid phase reaction in the presence of hydrogen chloride and a liquid phase fluorination catalyst. The hydrogen chloride is added into the reaction from an external source at a pressure of about 100 psig or more. The HCFC-244bb is an intermediate in the production of 2,3,3,3-tetrafluoropropene-1 (HFO-1234yf).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.