초록 ▼

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 formulaCX3CCl═CClX (where each X is independently F or Cl) to produce a product including both CF3CCl2CClF2 and CF3CClFCCl

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 formulaCX3CCl═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-chromuim oxide composition which has been treated with a fluorinating agent.

대표청구항 ▼

What is claimed is: 1. A process for the manufacture of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3-pentafluoropropane, comprising: (a) reacting hydrogen fluoride, chlorine, and at least one halopropene of the formula CX3CCl═CClX, wherein each X is independently selected from the group consist

What is claimed is: 1. A process for the manufacture of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3-pentafluoropropane, comprising: (a) reacting hydrogen fluoride, chlorine, and at least one halopropene of the formula CX3CCl═CClX, wherein each X is independently selected from the group consisting of F and Cl, to produce a product comprising CF3CCl2CClF2 and CF3CClFCCl2F, wherein said CF3CCl2CClF2 and CF3CClFCCl2F are produced in the presence of a chlorofluorination catalyst comprising at least one composition selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide, (ii) compositions comprising a zinc halide and α-chromium oxide and (iii) compositions of (i) or (ii) which have been treated with a fluorinating agent; (b) reacting CF3CCl2CClF2 and CF3CClFCCl2F produced in (a) with hydrogen to produce a product comprising CF3CH2CHF2 and CF3CHFCH2F; and (c) recovering CF3CH2CHF2 and CF3CHFCH2F from the product produced in (b). 2. The process of claim 1 wherein in (a) the catalyst is selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide and (iii) compositions of (i) which have been treated with a fluorinating agent. 3. The process of claim 2 wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 1 atom % to about 25 atom %. 4. The process of claim 2 wherein the catalyst is selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide wherein the ZnCr2O4 contains between about 10 atom percent and 67 atom percent of the chromium in the composition and at least about 70 atom percent of the zinc in the composition, and wherein at least about 90 atom percent of the chromium present as chromium oxide in the composition is present as ZnCr2O4 or crystalline α-chromium oxide and (iii) compositions of (i) which have been treated with a fluorinating agent. 5. The process of claim 1 wherein in (a) the catalyst is selected from the group consisting of (ii) compositions comprising a zinc halide and α-chromium oxide and (iii) compositions of (ii) which have been treated with a fluorinating agent. 6. The process of claim 5 wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 0.1 atom % to about 25 atom %. 7. The process of claim 5 wherein the catalyst is selected from the group consisting of (ii) compositions wherein a zinc halide is supported on a support comprising α-chromium oxide and (iii) compositions of (ii) which have been treated with a fluorinating agent; and wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 2 atom % to about 10 atom %.