Process for the manufacture of 1,1,1,2-Tetrafluoroethane

Details Process for the manufacture of 1,1,1,2-Tetrafluoroethane Process for the manufacture of 1,1,1,2-Tetrafluoroethane

1996-12-24

1998-03-24

Siegel, Alan

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

Organic compounds

Halogen containing

570169, C07C 1708

Patent

active

057314810

ABSTRACT:
The invention relates to the manufacture of 1,1,1,2-tetrafluoroethane (F134a) by gas-phase catalytic fluorination of 1-chloro-2,2,2-trifluoroethane (F133a).
A mixed catalyst is employed, composed of nickel and chromium oxides, halides and/or oxyhalides deposited on a support consisting of aluminium fluoride or of a mixture of aluminium fluoride and alumina.
This mixed catalyst makes it possible to obtain an excellent selectivity for F134a with a high production efficiency.

REFERENCES:
patent: 3650937 (1972-03-01), Henig
patent: 3787331 (1974-01-01), Groppelli et al.
patent: 3793229 (1974-02-01), Groppelli et al.
patent: 4129603 (1978-12-01), Bell
patent: 4147733 (1979-04-01), Fiske et al.
patent: 4922037 (1990-05-01), Manzer

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