Process for the manufacture of 1,1,1,2-Tetrafluoroethane
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United States of America Patent
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Mar 24, 1998
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N/A
app pub date -
Dec 24, 1996
filing date -
Nov 13, 1990
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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.
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