| 摘要 |
PCT No. PCT/GB95/01872 Sec. 371 Date Feb. 18, 1997 Sec. 102(e) Date Feb. 18, 1997 PCT Filed Aug. 8, 1995 PCT Pub. No. WO96/06062 PCT Pub. Date Feb. 29, 1996Process for the manufacture of pentafluoroethane [HFC 125] by reaction of perchloroethylene with hydrogen fluoride in the vapor phase over a fluorination catalyst in a fluorination reactor with recycle of dichlorotrifluoroethane [HCFC 123] and chlorotetrafluoroethane [HCFC 124] to the fluorination reactor, wherein tetrafluoroethane [HFC 134a] is also recycled to the fluorination reactor. The tetrafluoroethane and the chlorotetrafluoroethane can both be separated from the product stream in a single distillation column and recycled, together to the fluorination reactor. |
