Appeal No. 1996-3423
Serial No. 08/314,471
46 distinguishes over claim 37 in, for example, limiting
the contact of the zeolite-containing catalytic cracking
catalyst with zirconium, antimony and boron compounds to
a time prior to the process for catalytically cracking a
hydrocarbon-containing oil. Claim 37 is representative:
37. In a process for catalytically cracking a
hydrocarbon-containing oil feed, which contains in excess
of about 0.01 ppm nickel and in excess of about 0.01 ppm
vanadium and has an initial boiling point of at least
about 400 F, substantially in the absence of added0
hydrogen gas, in the presence of a zeolite-containing
catalytic cracking catalyst in a catalytic cracking zone
at a temperature in the range of about 800-1200 F, wherein0
at least one zirconium compound and at least one antimony
compound are added to said oil feed to as to provide a
concentratiom of about 0.1-5,000 ppm added zirconium and
about 0.1-5,000 ppm added antimony in said oil feed and
to incorporate at least about 0.01 weight-% zirconium and
at least about 0.01 weight-% antimony into said catalytic
cracking catalyst in said catalytic cracking zone,
the improvement which comprises additionally adding
at least one boron compound to said oil feed so as to
provide a concentration of about 0.1-5,000 ppm added
boron in said oil feed and to additionally incorporate at
least about 0.005 weight-% boron into said catalytic
cracking catalyst in said catalytic cracking zone,
thereby causing an increase of the combined yield of
gasoline and light cycle oil produced in said process.
The references relied upon by the examiner are:
Singleton 4,192,770 Mar. 11,
1980
Hettinger, Jr. 4,424,116 Jan. 3, 1984
2
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