| 摘要 |
PCT No. PCT/EP96/04095 Sec. 371 Date Jun. 10, 1998 Sec. 102(e) Date Jun. 10, 1998 PCT Filed Sep. 17, 1996 PCT Pub. No. WO97/11042 PCT Pub. Date Mar. 27, 1997The invention relates to the continuous preparation of heptafluoropropane by conversion of hexafluoropropene with HF in the presence of a liquid hydrofluoride of an organonitrogen base corresponding to the formula [BxnHF], in which B represents an organonitrogen base and n represents an integer or a fraction</=4, during which HF, hexafluoropropene and the hydrofluoride are converted in a first zone at an elevated pressure p1, the resulting heptafluoropropane is then evaporated off and isolated from the liquid reaction mixture, in a second zone under a pressure p2<p1, and the remaining liquid reaction mixture is then transferred back into the first zone.
|
