Process for the manufacture of 1,1,1,3,3-pentafluoropropane

Details Process for the manufacture of 1,1,1,3,3-pentafluoropropane Process for the manufacture of 1,1,1,3,3-pentafluoropropane

1999-06-01

2000-07-25

Siegel, A

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570176, 570156, 570157, 570158, C07C 1908, C07C 1725

Patent

active

060938595

ABSTRACT:
A process is disclosed for producing the hydrofluorocarbon CF.sub.3 CH.dbd.CF.sub.2. The process involves dehydrofluorinating CF.sub.3 CH.sub.2 CF.sub.3 at an elevated temperature in the vapor phase over a catalyst of (1) aluminum fluoride, (2) fluorided alumina, (3) metal supported on a trivalent aluminum compound containing fluoride anion, (4) lanthanum fluoride, (5) fluorided lanthanum oxide, (6) metal supported on a trivalent lanthanum compound containing fluoride anion, (7) trivalent chromium compounds and/or (8) catalysts of (a) at least one compound selected from the oxides, fluorides and oxyfluorides of magnesium, zinc and mixtures of magnesium and zinc, and optionally (b) at least one compound selected from the oxides, fluorides and oxyfluorides of aluminum, provided that the atomic ratio of aluminum to the total of magnesium and zinc in said catalyst is about 1:4, or less, to produce a product containing CF.sub.3 CH.dbd.CF.sub.2 and HF. The CF.sub.3 CH.dbd.CF.sub.2 may then be reacted in the vapor phase with hydrogen over a hydrogenation catalyst in the presence of HF to produce CF.sub.3 CH.sub.2 CHF.sub.2.

REFERENCES:
patent: 2599631 (1952-06-01), Harmon
patent: 2942036 (1960-06-01), Smith
patent: 3636172 (1972-01-01), Gardner
patent: 4828818 (1989-05-01), Carlson et al.
patent: 5136113 (1992-08-01), Rao
patent: 5396000 (1995-03-01), Nappa et al.
patent: 5414165 (1995-05-01), Nappa et al.
patent: 5856593 (1999-01-01), Powell et al.
Derwent Abstract (Week 9720) re JP 09 067 281 A, (1997).
Derwent Abstract (Week 9724) re JP 09 095 459 A, (1997).

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