Azeotropic compositions of hydrogen fluoride and Z-3,3,3-trifluoro-1-chloropropene
US10029961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2014 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Dec 9, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An azeotropic or quasi-azeotropic composition including hydrogen fluoride, Z-3,3,3-trifluoro-1-chloropropene and one or more (hydro)halocarbon compounds including 1 to 3 carbon atoms. The (hydro) halocarbon compounds are preferably selected among tetrachlorofluoropropanes, trichlorodifluoropropanes, dichlorotrifluoropropanes, chlorotetrafluoropropanes, pentafluoropropanes, dichlorodifluoropropenes, chlorotrifluoropropenes and tetrafluoropropenes. A process for producing a main (hydro)halocarbon compound, including the formation of a mixture of compounds including hydrogen fluoride, Z-3,3,3-trifluoro-1-chloropropene and one or more other (hydro)halocarbon compounds, distillation of this mixture making it possible to collect, firstly, an azeotropic composition, and, secondly, at least one of the compounds of the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.