Isomerization of 1-chloro-3,3,3-trifluoropropene

C - Chemistry – Metallurgy – 07 – C

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C07C 17/358 (2006.01) C07C 17/383 (2006.01) C07C 21/18 (2006.01)

Patent

CA 2746089

Disclosed are processes for an isomerization reaction between (E)1-chloro- 3,3,3-trifluoropropene and (Z)1--chloro-3,3,3-trifluoropropene. Some of the disclosed processes include the step of contacting a feed stream with a heated surface, where the feed stream includes (E)1-chloro-3,3,3-trifluoropropene, (Z)1-chloro- 3,3,3-trifluoropropene or mixtures thereof. The re-sulting product stream includes (E)1-chloro-3,3,3-trifluoropropene and (Z)1- chloro-3,3,3-trifluoropropene, where the ratio of (E) isomer to (Z) isomer in the product stream is different than the ratio feed stream. The (E) and (Z) isomers in the product stream may be separated from one another.

La présente invention concerne des procédés mettant en uvre une réaction d'isomérisation entre le (E)1-chloro-3,3,3-trifluoropropène et le (Z)1-chloro-3,3,3-trifluoropropène. Certains des procédés décrits comprennent une étape consistant à mettre un courant de réactifs en contact avec une surface chauffée, le courant de réactifs comprenant du (E)1-chloro-3,3,3-trifluoropropène, du (Z)1-chloro-3,3,3-trifluoropropène ou un mélange de ceux-ci. Le courant de produits résultant comprend du (E)1-chloro-3,3,3-trifluoropropène et du (Z)1-chloro-3,3,3-trifluoropropène, le rapport entre isomère (E) et isomère (Z) y étant différent de celui du courant de réactifs. Les isomères (E) et (Z) du courant de produits peuvent être séparés.

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