Appeal No. 98-0552
Application 08/357,567
The claims are directed to a process for the conversion
of unsegregated hydrocarbon feed in an FCC riser reactor
employing zeolitic catalyst to produce gasoline under
specifically recited conditions; one such condition being that
the feed is split and injected into the reactor at a plurality
of positions spaced along the reactor so that about 60 to 75
volume percent (see independent claims 1 and 2) or about 50 to
75 volume percent (see independent claims 33 and 41) of the
total feed is injected at the lowest injection position.
Claim 1 is illustrative of the claimed subject matter on
appeal:
1. A process for the conversion of unsegregated
hydrocarbon feed in an FCC riser reactor employing zeolitic
catalyst to produce gasoline which comprises:
a) splitting the hydrocarbon feed and injecting at a
plurality of positions along a length of said FCC riser
reactor, wherein about 60 to 75 volume percent of said feed is
injected to the lowest injection position, and the distance
between said lowest injection position and the next highest
injection position comprises at least 20% of the total length
of said riser reactor;
b) selecting the number of feed splits and selecting said
positions along said length of said FCC riser reactor, to
maximize the octane number of the gasoline;
c) recycling regenerated catalyst into the bottom of said
FCC riser reactor; and
2
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