Appeal No. 2006-1750 Παγε 5
Application No. 10/435,175
catalyst for epoxidizing olefins. See, e.g., column 10, lines
1-36 of Grosch.
Muller teaches a catalyst comprising titanium having a
zeolite structure, a platinum group metal such as palladium, and
optionally modified with an additional metal selected from among
iron, cobalt, nickel rhenium, silver and gold. The catalyst may
be employed in an epoxidation process. See, e.g., column 1,
lines 25-63 and column 2, lines 33-36 of Muller.
Muller teaches that the catalyst can be prepared by
impregnating a titanium zeolite structure with platinum metal
salt solution, subjecting the impregnated zeolite structure to
evaporation (ostensibly to remove solvent) followed by heating
(drying) to form the catalyst. See column 2, line 48 through
column 3, line 17 and Example 2 of Muller. As for the optional
additional iron, cobalt, nickel rhenium, silver or gold elements
suggested by Muller, Muller does not exemplify how any of those
metals are added but does state a desire for easy preparation of
the catalyst. See column 1, lines 25-28 of Muller.
It follows that one of ordinary skill in the art would have
been led to add such an additional metal, including gold, via a
conventional method, such as the impregnation method as taught by
Muller (and Grosch) for the palladium metal addition.
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