Process

Details Process Process

C - Chemistry, Metallurgy

07

C

C07C 17/25 (2006.01) C07C 21/18 (2006.01)

Patent

CA 2721121

The present invention provides a process for its preparation comprising (a) converting 1,1,1-trifluoro-2,3-dichloro-propane (243db) to 3,3,3-trifluoro-2-chloro-prop- 1-ene (CF3CCI=CH2) in the presence of a first catalyst in a first reactor, (b) contacting CF3CCI=CH2 with a fluorinating agent in the presence of a second catalyst in a second reactor to produce a compound of formula CF3CFXCH3, wherein X = Cl or F, and (c) dehydrohalogenating the compound of formula CF3CFXCH3 to produce 2,3,3,3- tetrafluoropropene (1234yf).

La présente invention concerne un procédé permettant sa préparation qui comprend les étapes consistant à : (a) convertir le 1,1,1-trifluoro-2,3-dichloropropane (243db) en 3,3,3-trifluoro-2-chloro-prop-1-ène (CF3CCI=CH2) en présence dun premier catalyseur dans un premier réacteur, (b) mettre en contact CF3CCI=CH2 avec un agent de fluoration en présence dun second catalyseur dans un second réacteur pour produire un composé de formule CF3CFXCH3, où X = Cl ou F, et (c) déshydrohalogéner le composé de formule CF3CFXCH3 pour produire le 2,3,3,3- tétrafluoropropène (1234yf).

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