Azeotropic compositions comprising hydrogen fluoride
AssigneeThe Chemours Company Fc, LLC
InventorsSHENG PENG, SIDDARTH SITAMRAJU, OLAGAPPAN MUTHU
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Abstract
The present application discloses azeotrope and azeotrope-like compositions comprising hydrogen fluoride and a compound selected from 2,4-dichloro-1,1,1,4,4-pentafluorobutane (345lfd) and 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd).
Claims24
A composition comprising:
- i) hydrogen fluoride;
- and
- ii) a compound selected from 2,4-dichloro-1,1,1,4,4-pentafluorobutane (345lfd) and 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd);
- wherein the 2,4-dichloro-1,1,1,4,4-pentafluorobutane (345lfd) or 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd) is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the hydrogen fluoride.
(canceled)
(canceled)
A process to remove 2,4-dichloro-1,1,1,4,4-pentafluorobutane (345lfd) from a composition comprising (E)-1,1,1,4,4,4-hexafluoro-2-butene and 2,4-dichloro-1,1,1,4,4-pentafluorobutane, comprising forming an azeotropic or azeotrope-like composition of 2,4-dichloro-1,1,1,4,4-pentafluorobutane and HF and removing the azeotrope or azeotrope-like composition from the composition comprising (E)-1,1,1,4,4,4-hexafluoro-2-butene and 2,4-dichloro-1,1,1,4,4-pentafluorobutane (345lfd).
A process to remove 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd) from a composition comprising (E)-1,1,1,4,4,4-hexafluoro-2-butene and 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd), wherein the process comprises forming an azeotropic or azeotrope-like composition of 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd) and HF and removing the azeotrope Page 7 or azeotrope-like composition from the composition comprising (E)-1,1,1,4,4,4-hexafluoro-2-butene and 3-chloro-1,1,4,4,4-pentafluorobut-1-ene (1335czd).
Dependencies are inferred from the claim text.