Search International and National Patent Collections

1. (WO2018178555) METHOD FOR THE PRODUCTION AND PURIFICATION OF 2,3,3,3-TETRAFLUORO-1-PROPENE

Pub. No.:    WO/2018/178555    International Application No.:    PCT/FR2018/050735
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 28 01:59:59 CEST 2018
IPC: C07C 17/20
C07C 17/23
C07C 17/38
C07C 17/383
C07C 17/386
C07C 21/18
Applicants: ARKEMA FRANCE
Inventors: DEUR-BERT, Dominique
WENDLINGER, Laurent
Title: METHOD FOR THE PRODUCTION AND PURIFICATION OF 2,3,3,3-TETRAFLUORO-1-PROPENE
Abstract:
The invention relates to a method for the purification of 2,3,3,3-tetrafluoro-1-propene (1234yf) using a first composition comprising 2,3,3,3-tetrafluoro-1-propene, 1,1,1,2,2-pentafluoropropane (245cb) and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), said method comprising the steps of: (a) bringing the first composition into contact with at least one organic extraction agent in order to form a second composition; (b) extractively distilling the second composition in order to form a third composition comprising the organic extraction agent and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), and a stream comprising 2,3,3,3-tetrafluoro-1-propene and 1,1,1,2,2-pentafluoropropane (245cb); and (c) recovering and separating the third composition in order to form a stream comprising the organic extraction agent and a stream comprising trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E). The invention also relates to a method for producing 2,3,3,3-tetrafluoro-1-propene.