Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By c content reduction – e.g. – cracking – etc.
Reexamination Certificate
2006-01-17
2009-12-15
Bullock, In Suk (Department: 1797)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By c content reduction, e.g., cracking, etc.
C208S072000, C208S077000, C208S078000, C208S080000, C208S120100, C208S153000, C208S161000, C208S164000, C422S139000, C422S147000
Reexamination Certificate
active
07632977
ABSTRACT:
Disclosed is a process for making middle distillate and lower olefins. The process includes catalytically cracking a gas oil feedstock within a riser reactor zone by contacting under suitable catalytic cracking conditions within the riser reactor zone the gas oil feedstock with a middle distillate selective cracking catalyst that comprises amorphous silica alumina and a zeolite to yield a cracked gas oil product and a spent cracking catalyst. The spent cracking catalyst is regenerated to yield a regenerated cracking catalyst. Within an intermediate cracking reactor such as a dense bed reactor zone and under suitable high severity cracking conditions a gasoline feedstock is contacted with the regenerated cracking catalyst to yield a cracked gasoline product and a used regenerated cracking catalyst. The used regenerated cracking catalyst is utilized as the middle distillate selective catalyst.
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Hadjigeorge Georghios Agamemnonons
Khouw Frank Hsian Hok
Mo Weijian
Bullock In Suk
Hickman William E.
Shell Oil Company
Singh Prem C.
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