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1. (WO2018044787) SEPARATION OF (Z)-1-CHLORO-3,3,3-TRIFLUOROPROPENE (HCFO-1233zd(Z)) AND 1-CHLORO-1,3,3,3-TETRAFLUOROPROPANE (HCFC-244fa) BY ADDING A THIRD COMPONENT

Pub. No.:    WO/2018/044787    International Application No.:    PCT/US2017/048884
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Tue Aug 29 01:59:59 CEST 2017
IPC: C07C 17/386
C07C 21/18
C07C 19/10
Applicants: HONEYWELL INTERNATIONAL INC.
Inventors: POKROVSKI, Konstantin A.
MERKEL, Daniel C.
BASU, Rajat S.
TUNG, Hsueh Sung
Title: SEPARATION OF (Z)-1-CHLORO-3,3,3-TRIFLUOROPROPENE (HCFO-1233zd(Z)) AND 1-CHLORO-1,3,3,3-TETRAFLUOROPROPANE (HCFC-244fa) BY ADDING A THIRD COMPONENT
Abstract:
A method for separating halocarbons and, in particular, a method for separating (Z)- 1 -chloro-3,3,3-trifluoropropene (HCFO-1233zd(Z), or simply 1233zd(Z)) and 1 -chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa, or simply 244fa) via distillation by adding a third component, hydrogen fluoride (HF), forming a binary azeotrope of 1233zd(Z) and HF. The binary 1233zd(Z)/HF azeotrope may then be recovered from the distillation column as an overhead stream which includes only a relatively minor amount of 244fa, while the 244fa may be recovered from the distillation column as a bottoms stream which includes only relatively minor amounts of 1233zd(Z) and HF.