Methods and materials are provided for the production of essentially isomerically pure perhalogenated and partially halogenated compounds. One embodiment of the present invention provides a process for the production of essentially isomerically pure CFC-216aa. Other embodiments include processes for
Methods and materials are provided for the production of essentially isomerically pure perhalogenated and partially halogenated compounds. One embodiment of the present invention provides a process for the production of essentially isomerically pure CFC-216aa. Other embodiments include processes for the production of CFC-217ba and HFC-227ea. Particular embodiments of the present invention provide separation techniques for the separation of chlorofluorocarbons from HF, from other chlorofluorocarbons, and the separation of isomers of halogenated compounds. Still other embodiments of the present invention provide catalytic synthetic techniques that demonstrate extended catalyst lifetime. In other embodiments, the present invention provides catalytic techniques for the purification of isomeric mixtures.
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What is claimed is: 1. A process for producing CF3CFHCF3 comprising: contacting a C-3 reactant comprising one or more of perhydrogenated or partially halogenated C-3 hydrocarbons with Cl2 and HF in the presence of a first catalyst at a first temperature to form a C-3 product comprising a C-3 perhal
What is claimed is: 1. A process for producing CF3CFHCF3 comprising: contacting a C-3 reactant comprising one or more of perhydrogenated or partially halogenated C-3 hydrocarbons with Cl2 and HF in the presence of a first catalyst at a first temperature to form a C-3 product comprising a C-3 perhalogenated compound; contacting the C-3 product with HF in the presence of a second catalyst at a second temperature to form a CF3CCl2CF3 product, the CF3CCl2CF3 product comprising a mole ratio of CF3CCl2CF3 to CF3CF3CFClCClF2 greater than 2:1; contacting the CF3CCl2CF3 product with HF in the presence of a third catalyst at a third temperature to form CF3CClFCF3; and contacting the CF3CClFCF3 with H2 in the presence of a fourth catalyst at a fourth temperature to produce CF3CFHCF3. 2. The process of claim 1 wherein the first temperature is at least about 150�� C., the second temperature is at least about 300�� C., the third temperature is at least about 200�� C. and the fourth temperature is at least about 30�� C. 3. The process of claim 2 wherein the first temperature is from about 150�� C. to about 450�� C., the second temperature is from about 300�� C. to about 550�� C., the third temperature is from about 200�� C. to about 550�� C. and the fourth temperature is from about 30�� C. to about 275�� C. 4. The process of claim 3 wherein the first temperature is at least about 220�� C., the second temperature is at least about 470�� C., the third temperature is at least about 470�� C. and the fourth temperature is at least about 185�� C. 5. The process of claim 1 wherein, during the contacting of the C-3 reactant with the HF and the Cl2, a molar ratio of the HF to the Cl2 is from about 0.75:1 to about 8:1. 6. The process of claim 5 wherein, during the contacting of the C-3 reactant with the HF and the Cl2, a molar ratio of the HF to the C2 is at least about 4:1. 7. The process of claim 1 wherein, during the contacting of the C-3 reactant with the HF and the C2, a molar ratio of the Cl2 to the C-3 reactant is from about 8:1 to about 10:1. 8. The process of claim 7 wherein, during the contacting of the C-3 reactant with the HF and the Cl2, a molar ratio of the C2 to the C-3 reactant is at least about 8.2:1. 9. The process of claim 1 wherein, during the contacting of the C-3 reactant with the HF and the Cl2, a molar ratio of the HF to the C-3 reactant is from about 6:1 to about 64:1. 10. The process of claim 9 wherein, during the contacting of the C-3 reactant with the HF and the Cl2, a molar ratio of the HF to the C-3 reactant is at least about 35:1. 11. The process of claim 1 wherein, during the contacting of the C-3 product with the HF, a molar ratio of the HF to the C-3 product is from about 6:1 to about 64:1. 12. The process of claim 11 wherein, during the contacting of the C-3 product with the HF, a molar ratio of the HF to the C-3 product is at least about 30:1. 13. The process of claim 1 wherein, during the contacting of the CF3CCl2CF3 product with the HF, a molar ratio of the HF to the CF3CCl2CF3 is from about 1:1 to about 30:1. 14. The process of claim 13 wherein, during the contacting of the CF3CCl2CF3 product with the HF, a molar ratio of the HF to the CF3CCl2CF3 is at least about 10:1. 15. The process of claim 1 wherein, during the contacting of the CF3CClFCF3 with the H2, a molar ratio of the H2 to the CF3CClFCF3 is from about 0.2:1 to about 10:1. 16. The process of claim 15 wherein, during the contacting of the CF3CClFCF3 with the H2, a molar ratio of the H2 to the CF3CClFCF3 is at least about 1.2:1. 17. The process of claim 1 further comprising, during the contacting of the CF3CClFCF3 with H2, contacting the fourth catalyst with water. 18. The process of claim 17 wherein the water is present in an amount from about 0.04 to about 12 percent by weight of the CF3CClFCF3. 19. The process of claim 18 wherein the amount is about 0.8 percent by weight of the CF3CClFCF3. 20. The process of claim 1 further comprising, during the contacting of the C-3 product with HF, contacting the C-3 product with Cl2. 21. The process of claim 1 wherein the first catalyst comprises chromium and a catalyst support. 22. The process of claim 1 wherein the second catalyst comprises chromium and a catalyst support. 23. The process of claim 1 wherein the third catalyst comprises chromium and a catalyst support. 24. The process of claim 1 wherein the fourth catalyst comprises palladium and a catalyst support. 25. The process of claim 1 further comprising, during the contacting of the C-3 reactant with HF and Cl2, contacting the C-3 reactant with a diluent. 26. The process of claim 1 wherein, the C-3 product further comprises a halogenation by-product and, during the contacting of the C-3 reactants with the Cl2 and the HF, the C-3 reactants further comprises the halogenation by-product. 27. A process for producing CF3CFHCF3 comprising: contacting a C-3 reactant comprising one or more of perhydrogenated and partially halogenated C-3 hydrocarbons with Cl2 and HF in the presence of a first catalyst at a first temperature to form a C-3 product comprising a mole ratio of CF3CCl2CF3 to CF3CFClCClF2 greater than 2:1; and contacting the C-3 product with HF in the presence of a second catalyst at a second temperature to form CF3CClFCF3; contacting the CF3CClFCF3 with H2 in the presence of a third catalyst at a third temperature to form CF3CFHCF3. 28. The process of claim 27 wherein the first temperature is at least about 150�� C., the second temperature is at least about 200�� C., and the third temperature is at least about 30�� C. 29. The process of claim 28 wherein the first temperature is from about 150�� C. to about 300�� C., the second temperature is from about 200�� C. to about 550�� C., and the third temperature is from about 30�� C. to about 275�� C. 30. The process of claim 29 wherein the first temperature is at least about 220�� C., the second temperature is at least about 470�� C., and the third temperature is at least about 185�� C. 31. The process of claim 27 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the HF to the Cl2 is from about 0.75:1 to about 8:1. 32. The process of claim 31 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the HF to the Cl2 is at least about 4:1. 33. The process of claim 27 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the Cl2 to the C-3 reactant is from about 8:1 to about 10:1. 34. The process of claim 33 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the Cl2 to the C-3 reactant is at least about 8.2:1. 35. The process of claim 27 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the HF to the C-3 reactant is from about 6:1 to about 64:1. 36. The process of claim 35 wherein, during the contacting of the C-3 reactant with the Cl2 and the HF, a molar ratio of the HF to the C-3 reactant is at least about 35:1. 37. The process of claim 27 wherein, during the contacting of the C-3 product with the HF, a molar ratio of the HF to the C-3 product is from about 6:1 to about 64:1. 38. The process of claim 37 wherein the, during the contacting of the C-3 product with the HF, a molar ratio of the HF to the C-3 product is at least about 30:1. 39. The process of claim 27 wherein, during the contacting of the CF3CClFCF3 with the H2, a molar ratio of the H2 to the CF3CClFCF3 is from about 0.2:1 to about 10:1. 40. The process of claim 39 wherein, during the contacting of the CF3CClFCF3 with the H2, a molar ratio of the H2 to the CF3CClFCF3 is at least about 1.2:1. 41. The process of claim 27 further comprising, during the contacting of the CF3CClFCF3 with the H2, contacting the third catalyst with water. 42. The process of claim 41 wherein the water is present in an amount from about 0.04 to about 12 percent by weight of the CF3CClFCF3. 43. The process of claim 42 wherein the amount is about 0.8 percent by weight of the CF3CClFCF3. 44. The process of claim 27 further comprising, during the contacting of the C-3 product with HF, contacting the C-3 product with Cl2. 45. The process of claim 27 wherein the first catalyst comprises chromium and a catalyst support. 46. The process of claim 27 wherein the second catalyst comprises chromium and a catalyst support. 47. The process of claim 27 wherein the third catalyst comprises palladium and a catalyst support. 48. The process of claim 27 further comprising, during the contacting of the C-3 reactant with Cl2 and HF, contacting the C-3 reactant with a diluent. 49. The process of claim 27 wherein, the C-3 product further comprises a halogenation by-product and, during the contacting of the C-3 reactant with the Cl2 and the HF, the C-3 reactant further comprises the halogenation by-product. 50. The process of claim 1 further comprising, during the contacting of the C-3 product with the HF, contacting the C-3 product with a diluent. 51. The process of claim 1 further comprising, during the contacting of the CF3CCl2CF3 product with the HF, contacting the CF3CCl2CF3 with a diluent. 52. The process of claim 1 further comprising, during the contacting of the CF3CClFCF3 with the H2, contacting the CF3CClFCF3 with a diluent. 53. The process of claim 1 wherein the contacting of the CF3CCl2CF3 product with the HF also forms a halogenation exchange by-product and, during the contacting of the C-3 product with HF, the C-3 product further comprises the halogenation exchange by-product. 54. The process of claim 53 wherein the halogenation exchange by-product comprises one or more of CF3CCl2CF3, CF3CF2CF3, and C3F5Cl3. 55. The process of claim 1 wherein the contacting of the CF3CCl2CF3 product with the HF also forms a halogenation exchange by-product and, during the contacting of the C-3 reactant with Cl2 and HF, the C-3 reactant further comprises the halogenation exchange by-product. 56. The process of claim 55 wherein the halogenation exchange by-product comprises one or more of CF3CCl2CF3, CF3CF2CF3, and C3F5Cl3. 57. The process of claim 1 wherein the first and the second catalysts comprise the same material. 58. The process of claim 1 wherein the first and the second catalyst comprise the same material as the third catalyst. 59. The process of claim 27 further comprising, during the contacting of the C-3 product with the HF, contacting the C-3 product with a diluent. 60. The process of claim 27 further comprising, during the contacting of the CF3CClFCF3 with the H2, contacting the CF3CClFCF3 with a diluent. 61. The process of claim 27 wherein the contacting of the C-3 product with the HF also forms a halogenation exchange by-product and, during the contacting of the C-3 reactant with Cl2 and HF, the C-3 reactant further comprises the halogenation exchange by-product. 62. The process of claim 61 wherein the halogenation exchange by-product comprises one or more of CF3CCl2CF3, CF3CF2CF3, and C3F5Cl3. 63. The process of claim 27 wherein the first and the second catalysts comprise the same material. 64. The process of claim 27 wherein the first and the second catalyst comprise the same material as the third catalyst.
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