Appeal No. 1999-1861
Application No. 08/695,482
composition comprises a ZSM-5 zeolite and a metal selected from
the group consisting of nickel, palladium, molybdenum, gallium,
platinum, and combinations of any two or more thereof; and said
zeolite is treated with an acid before being incorporated with
said metal.
The examiner relies upon the following references as
evidence of obviousness:
Nemet-Mavrodin et al. 4,922,051 May 1, 1990
(Nemet-Mavrodin)
Rodewald 5,220,086 Jun. 15, 1993
Appellants' claimed invention is directed to a process for
converting a hydrocarbon feed to an olefin and a C to C6 8
aromatic hydrocarbon. The process entails contacting the feed
with a catalyst composition comprising a ZSM-5 zeolite and one of
the recited metals, e.g., nickel. The catalyst is prepared by
treating the zeolite with an acid before the metal is
incorporated therein.
Appealed claims 1-37 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Nemet-Mavrodin in view of Rodewald.
Upon careful consideration of the opposing arguments
presented on appeal, we concur with appellants that the examiner
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