Appeal No. 1999-1180
Application No. 08/751,557
teaches that the hydrogenation catalyst is preferably a catalyst
based on palladium and that the catalyst may further contain an
additional metal, preferably a metal that is more active than
palladium (e.g., nickel). (Page 2, lines 36-39 and 40-56;
examples 20-21.) Moore, however, does not specifically describe
the use of a catalyst based on palladium and at least one
additional metal selected from the group consisting of vanadium,
zirconium, calcium, magnesium, niobium, and tantalum as recited
in appealed claim 1.
Like Moore, Morikawa's disclosure also relates to a method
for forming a particular fluoroalkane by reacting hydrogen with
a particular haloalkane starting material in the presence of a
hydrogenation catalyst. Specifically, Morikawa describes a
method for preparing tetrafluoroethane represented by CF3CH2F or
CHF2CHF2 by reacting a haloethane represented by CF2XCFYZ (X is F
or Cl; when X is F, Y and Z are Cl, F, or H; when one of Y or Z
is F, the other Y or Z is H or Cl; when X is Cl, one of Y or Z
is F and the other one of Y or Z is H or Cl) with hydrogen in
the presence of a hydrogenation catalyst, which is formed by
adding at least one element (or compound thereof) selected from
the group consisting of Zr, Hf, Ti, Ni, and Ta to a platinum
group element (e.g., palladium). (E.g., page 2, claim 1; page
4
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007