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 α-chromium oxide composition, a ZnCr2O4/crystalline α-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/α-chromium oxide composition and/or a zinc halide/α-chromium oxide composition which has been treated with a fluorinating agent.
揭示了一种制备CF3CH2CHF2和CF3CHFCH2F的工艺。该工艺涉及:(a)反应
氢氟酸、
氯和至少一种具有分子式CX3CCl=CClX的卤代
丙烯,其中每个X独立地为F或Cl,以产生包括CF3CCl2CClF2和CF3CClFCCl2F的产物;(b)将(a)中产生的CF3CCl2CClF2和CF3CClFCCl2F与氢反应,以产生包括CF3CH2CHF2和CF3CHFCH2F的产物;(c)从(b)中产生的产物中回收CF3CH2CHF2和CF3CHFCH2F。在(a)中,CF3CCl2CClF2和CF3CClFCCl2F是在存在
氯氟化催化剂的情况下产生的,该催化剂包括ZnCr2O4/结晶α-
铬氧化物组合物、经
氟化剂处理过的ZnCr2O4/结晶α-
铬氧化物组合物、
锌卤化物/α-
铬氧化物组合物和/或经
氟化剂处理过的
锌卤化物/α-
铬氧化物组合物。