C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 19/08 (2006.01) C07C 17/20 (2006.01) C07C 17/21 (2006.01) C07C 17/23 (2006.01)
Patent
CA 2539938
A process for the manufacture of CF3CH2CHF2 and CF3CH2CF3 is disclosed. The process involves (a) reacting HF and at least one halopropene of the formula CX3CCl=CClX (where each X is independently F or Cl) to produce a product including both CF3CCl=CF2 and CF3CHClCF3; (b) reacting CF3CCl=CF2 and CF3CHClCF3 produced in (a) with hydrogen to produce a product including both CF3CH2CHF2 and CF3CH2CF3; and (c) recovering CF3CH2CHF2 and CF3CH2CF3 from the product produced in (b). In (a), the CF3CCl=CF2 and CF3CHClCF3 are produced in the presence of a fluorination 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?CH¿2?CF¿3?, selon les étapes suivantes : (a) réaction entre HF 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=CF¿2? et CF¿3?CHCICF¿3? ; (b) réaction de CF¿3?CCI=CF¿2? et CF¿3?CHCICF¿3? provenant de (a) avec de l'hydrogène pour donner un produit comprenant à la fois CF¿3?CH¿2?CHF¿2? et CF¿3?CH¿2?CF¿3?; et (c) récupération de CF¿3?CH¿2?CHF¿2? et de CF¿3?CH¿2?CF¿3 ?à partir du produit issu de (b). A l'étape (a), on produit CF¿3?CCI=CF¿2? et CF¿3?CHCICF¿3? en présence d'un catalyseur de fluoration 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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