Azeotropic compositions of 2-chloro-3,3,3-trifluoropropene (HCFC-1233xf), 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb), and hydrogen fluoride (HF)
US8034251B2 · kind B2 · utility
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Key dates
| Filing date | Mar 18, 2009 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | May 8, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C19/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided are ternary azeotropic and azeotrope-like compositions of 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb), and hydrogen fluoride (HF). Such azeotropic and azeotrope-like compositions are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.