Method for purifying 1-chloro-3,3,3-trifluoropropene
AssigneeArkema France
InventorsEmmanuel Boussarie, Kevin Hisler, Anne Pigamo, Bertrand Collier
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Abstract
The present invention relates to a process for purifying 1-chloro-3,3,3-trifluoropropene comprising the steps of: a) providing a stream comprising 1-chloro-3,3,3-trifluoropropene and at least one compound of formula HX wherein X is F or Cl; b) bringing the stream from step a) into contact with a solution A comprising at least one sulfite salt of formula Yn+mSO3 wherein Y is an alkali or alkaline-earth metal, n=1 or 2, and m=2 when n=1 or m=1 when n=2; in order to form a neutralized stream A1 comprising 1-chloro-3,3,3-trifluoropropene.
Claims12
A process for purifying 1-chloro-3,3,3-trifluoropropene comprising the steps of:
- a) providing a stream comprising 1-chloro-3,3,3-trifluoropropene and at least one compound of formula HX wherein X is F or Cl;
- b) bringing the stream from step a) into contact with a solution A comprising at least one alkali metal hydroxide or one alkaline-earth metal hydroxide and at least one sulfite salt of formula Yn+mSO3 wherein Y is an alkali or alkaline-earth metal, n=1 or 2, and m=2 when n=1 or m=1 when n=2;
- in order to form a neutralized stream A1 comprising 1-chloro-3,3,3-trifluoropropene.
Dependencies are inferred from the claim text.