FCC process for producing enhanced yields of C.sub.4 /C.sub.5 olefins
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United States of America Patent
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Dec 5, 1995
Grant Date -
N/A
app pub date -
Jul 18, 1994
filing date -
Jul 18, 1994
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Abstract
Disclosed is a process for converting a hydrocarbon charge to a product containing improved yields of C.sub.4 /C.sub.5 olefins with a reduction in the loss of gasoline yield which comprises: passing said hydrocarbon charge into contact with a catalyst comprising a phosphorus-containing medium pore zeolite mixed as an additive with Y-zeolite in a weight ratio of 0.005 to 0.10, said zeolites in separate or composite spray dried particles, wherein the catalyst to oil ratio is 0.1 to 10, reacting said hydrocarbon charge at a temperature of 800.degree. F. to 1200.degree. F., a pressure of 0 to 150 psig, and in the absence of added hydrogen, thereby producing a product containing improved yields of C.sub.4 /.sub.5 olefins and reduced loss in gasoline yield.
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