	US 11,746,073 B2
	Method for purifying 1-chloro-3,3,3-trifluoropropene
Emmanuel Boussarie, Pierre-Benite (FR); Kevin Hisler, Pierre-Benite (FR); Anne Pigamo, Pierre-Benite (FR); and Bertrand Collier, Pierre-Benite (FR)
Assigned to Arkema France, Colombes (FR)
Appl. No. 17/600,179
Filed by ARKEMA FRANCE, Colombes (FR)
PCT Filed Apr. 1, 2020, PCT No. PCT/EP2020/059231 § 371(c)(1), (2) Date Sep. 30, 2021, PCT Pub. No. WO2020/201340, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. FR1903536 (FR), filed on Apr. 3, 2019.
Prior Publication US 2022/0153665 A1, May 19, 2022
Int. Cl. C07C 17/395 (2006.01); C07C 17/20 (2006.01)

CPC C07C 17/395 (2013.01) [C07C 17/206 (2013.01)]

12 Claims

1. 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⁺_mSO₃wherein 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.