C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 19/08 (2006.01) C07C 17/04 (2006.01) C07C 17/21 (2006.01) C07C 17/23 (2006.01)
Patent
CA 2539936
A process is disclosed for the manufacture of CF3CH2CHF2 and CF3CHFCH2F. The process involves (a) reacting hydrogen fluoride, chlorine, and at least one halopropene of the formula CX3CCl=CClX (where each X is independently F or Cl) to produce a product including both CF3CCl2CClF2 and CF3CClFCCl2F; (b) reacting CF3CCl2CClF2 and CF3CClFCCl2F produced in (a) with hydrogen to produce a product including both CF3CH2CHF2, and CF3CHFCH2F; and (c) recovering CF3CH2CHF2 and CF3CHFCH2F from the product produced in (b). In (a), the CF3CCl2CClF2 and CF3CClFCCl2F are produced in the presence of a chlorofluorination catalyst including a ZnCr2O4/crystalline .alpha.-chromium oxide composition, a ZnCr2O4/crystalline .alpha.-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/.alpha.- chromium oxide composition and/or a zinc halide/.alpha.-chromium oxide composition which has been treated with a fluorinating agent.
L'invention concerne un procédé d'élaboration de CF¿3?CH¿2?CHF¿2? et de CF¿3?CHFCH¿2?F, selon les étapes suivantes : (a) réaction entre fluorure d'hydrogène, chlore et au moins un halopropène de formule CX¿3?CCI=CCIX (chaque X est indépendamment F ou CI), donnant un produit qui comprend à la fois CF¿3?CCI¿2?CCIF¿2? et CF¿3?CCIFCCI¿2?F ; (b) réaction de CF¿3?CCI¿2?CCIF¿2? et de CF¿3?CCIFCCI¿2?F provenant de (a) avec de l'hydrogène pour donner un produit comprenant à la fois CF¿3?CH¿2?CHF¿2? et CF¿3?CHFCH¿2?F ; et (c) récupération de CF¿3?CH¿2?CHF¿2? et CF¿3?CHFCH¿2?F à partir du produit issu de (b). A l'étape (a), on produit CF¿3?CCI¿2?CCIF¿2? et CF¿3?CCIFCCI¿2?F en présence d'un catalyseur de chlorofluoration renfermant une composition de ZnCr¿2?O¿4?/oxyde d'.alpha.-chrome cristallin, une composition de ZnCr¿2?O¿4?/oxyde d'.alpha.-chrome cristallin traitée avec un agent de fluoration, une composition d'halogénure de zinc/oxyde d'.alpha.-chrome et/ou une composition d'halogénure de zinc/oxyde d'.alpha.-chrome traitée avec un agent de fluoration.? ¿
Rao Velliyur Nott Mallikarjuna
Sievert Allen Capron
E.i. Du Pont de Nemours And Company
Torys Llp
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