Appeal No. 1995-4851
Application 08/167,656
fluorides, or oxides or oxy-halides (col. 1, line 59 - col. 2,
line 7; col. 2, lines 24-30). In run no. 7 in Groppelli’s
Table 1, the zinc is over 50% of the metal on the catalyst
support. In Groppelli’s
Example 1, the catalyst contains beta-aluminum fluoride and
64.2% fluorine. Regarding the performance of the catalyst,2
Groppelli states (col. 1, lines 35-46):
These catalysts are characterized in that they make
it possible to form greater quantities of
symmetrical compounds or compounds having a
relatively higher degree of symmetry as compared
with those obtained when using known catalysts. The
expression “degree of symmetry” as used herein
refers to the distribution of the fluorine atoms and
it is also intended that a not entirely symmetrical
compound such as
CF Cl-CFCl
2 2
has a higher degree of symmetry than the CF -CCl
3 3
isomer.
Groppelli does not disclose production of the product recited
in appellants’ claim 1.
Scipioni discloses fluorination of trichloroethylene in
the gas-phase with HF to produce 1,1,1-trifluoro-2-
2 Appellants state in their specification (page 5, lines
13-20) that an atomic ratio of F to Al in the catalyst support
of at least 2.7 as recited in their claim 1 corresponds to at
least 90 wt% fluorine.
7
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