Azeotropic compositions of hydrogen fluoride and Z-3,3,3-trifluoro-1-chloropropene
AssigneeArkema France
InventorsDominique Deur-Bert, Anne Pigamo, Philippe Bonnet
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Abstract
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. The (hydro) halocarbon compounds are preferably selected among tetrachlorofluoropropanes, trichlorodifluoropropanes, dichlorotrifluoropropanes, chlorotetrafluoropropanes, pentafluoropropanes, dichlorodifluoropropenes, chlorotrifluoropropenes and tetrafluoropropenes.
Claims11
A process for producing a (hydro)halocarbon compound comprising from 1 to 3 carbon atoms, comprising:
- forming a mixture of compounds comprising hydrogen fluoride, Z-3,3,3-trifluoro-1-chloropropene and two or more (hydro)halocarbon compounds comprising from 1 to 3 carbon atoms;
- distilling the mixture to, firstly, an azeotropic composition comprising hydrogen fluoride, Z-3,3,3-trifluoro-1-chloropropene and two or more (hydro)halocarbon compounds comprising from 1 to 3 carbon atoms, and, secondly, at least one of the compounds of the mixture.
Dependencies are inferred from the claim text.