A manufacturing method for 1,1,1,3,3-pentafluoropropane

Details A manufacturing method for 1,1,1,3,3-pentafluoropropane A manufacturing method for 1,1,1,3,3-pentafluoropropane

C - Chemistry, Metallurgy

07

C

C07C 19/08 (2006.01) C07C 17/20 (2006.01)

Patent

CA 2233618

A process for producing 1,1,1,3,3-pentafluoropropane (HFC-245fa) which comprises reacting a halogenated propane represented by the following general formula, such as 1,1,1,3,3-pentachloropropane: CX3 CH2 CHX2 wherein X represents fluoro (F) or chloro (Cl), provided that not all Xs represent fluoro at the same time; with anhydrous hydrofluoric acid (HF) in the presence of an antimony catalyst to thereby give HFC-245fa. Thus HFC-245fa can be economically and efficiently obtained via simple steps.

L'invention concerne un procédé pour produire le 1,1,1,3,3-pentafluoropropane (HFC-245fa), qui consiste à faire réagir un propane halogéné, comme par exemple le 1,1,1,3,3-pentachloropropane, représenté par la formule générale CX3CH2CHX2 dans laquelle X est un fluoro (F) ou chloro (Cl), à condition que les X ne soient pas tous des F, avec de l'acide fluorhydrique anhydre (HF), en présence d'un catalyseur à l'antimoine, pour donner le HFC-245fa. Ainsi, le HFC-245fa peut être obtenu économiquement et efficacement par des étapes simples.

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