| 摘要 |
PCT No. PCT/GB95/00766 Sec. 371 Date Sep. 19, 1996 Sec. 102(e) Date Sep. 19, 1996 PCT Filed Apr. 4, 1995 PCT Pub. No. WO95/27688 PCT Pub. Date Oct. 19, 1995There is provided a process for the production of pentafluoroethane which comprises contacting a hydrofluorochloroethane having the formula: C2H1Cl1+xF1+y wherein x and y are each independently 0,1,2 or 3 provided x+y is 3 with hydrogen fluoride in the vapor phase and in the presence of a fluorination catalyst which comprises zinc or a compound of zinc and chromia, chromium fluoride or chromium oxyfluoride. |
