Appeal No. 1995-4851
Application 08/167,656
claims 1-20, which are all of the claims in the application.
THE INVENTION
Appellants’ claimed invention is directed toward a
process for making 2-chloro-1,1,1-trifluoroethane by reacting
a 2-chloro-1,1-dihaloethene, where each halo is chloro or
fluoro, with hydrogen fluoride in the gaseous phase in the
presence of a catalyst which includes a recited amount of zinc
on a highly fluorinated alumina support which contains
$-aluminum fluoride. Claim 1 is illustrative and reads as
follows:
1. A process for producing 2-chloro-1,1,1-
trifluoroethane comprising the step of reacting a
trihaloethene of the formula CX =CHC1 wherein each X is
2
chlorine or fluorine, with HF in the gaseous phase at an
elevated temperature in the presence of a supported metal
catalyst; wherein said catalyst is a catalyst of metal
fluoride on a fluorinated alumina support having an atomic
ratio of F to Al of at least 2.7:1 and containing $-aluminum
fluoride; wherein said supported metal includes zinc and
optionally includes one or more other metals selected from
Groups VIII, VIIB, VIB, IIIB, IIB and IB of the Periodic Table
and elements having atomic numbers between 57 and 71; and
wherein zinc is at least about 0.1 percent by weight of the
catalyst and is at least about 40 percent by weight of the
metal on said support.
THE REFERENCES
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