Catalytic cracking process of petroleum hydrocarbons
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United States of America Patent
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Issued Date -
Jun 26, 2003
app pub date -
Aug 28, 2002
filing date -
Aug 29, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses a catalytic cracking process of petroleum hydrocarbons and a tube-in-tube riser reactor used therein. In the present invention, a catalyst is fed via an inlet conduit to an inner tube and an annular space between the inner and outer tubes of the tube-in-tube riser reactor to contact a hydrocarbon feedstock, and the hydrocarbon feedstock is cracked under FCC conditions, then a reaction stream thus produced flows into a separation apparatus via a confluence tube to separate a hydrocarbon product stream from a spent catalyst, the spent catalyst is stripped and regenerated, then a regenerated catalyst is recycled for reuse. The process of the present invention can improve both product distribution and product properties.
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