Process for the manufacture of hydrochlorofluoroolefins

Details Process for the manufacture of hydrochlorofluoroolefins Process for the manufacture of hydrochlorofluoroolefins

C - Chemistry, Metallurgy

07

C

C07C 17/358 (2006.01) C07C 17/20 (2006.01) C07C 21/18 (2006.01)

Patent

CA 2743670

The present invention provides a process for the manufacture of trans 1-chloro- 3,3,3-trifluoropropene (E-1233zd). The first step of the process comprises the fluorination of 1,1,3,3- tetrachlororopropene (1230za, CCh=CH-CHCh) and/or 1,1,1,3,3- pentaachloropropane (240fa) to a mixture of cis 1233zd (Z-1233zd) and trans 1233zd (E-1233zd). The second step of the process comprises a separation of the mixture formed in the first step to isolate cis 1233zd (Z-1233zd) from the mixture. The third step of the process comprises isomerization of cis 1233zd (Z-1233zd) to trans 1233zd (E- 1233zd).

La présente invention porte sur un procédé de fabrication de trans 1-chloro-3,3,3-trifluoropropène (E-1223zd). La première étape du procédé comprend la fluoration du 1,1,3,3-tétrachloropropène (1230za, CCh=CH-CHCh) et/ou du 1,1,1,3,3-pentachloropropane (240fa) en un mélange de cis 1233zd (Z-1233zd) et de trans 1233zd (E-1233zd). La seconde étape du procédé comprend une séparation du mélange formé dans la première étape pour isoler le cis 1233zd (Z-1233zd) à partir du mélange. La troisième étape du procédé comprend l'isomérisation de cis 1233zd (Z-1233zd) en trans 1233zd (E-1233zd).

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