Method for fluid catalytic cracking of hydrocarbon feedstock
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United States of America Patent
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Dec 7, 1999
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N/A
app pub date -
May 12, 1998
filing date -
Sep 18, 1996
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Abstract
A hydrocarbon catalytic cracking process in which, a substantial portion of the hydrocarbons is pulverized and placed in contact with a specific contact zone, which is composed of: a mixing chamber having a maximum section S.sub.2, the upper part of which is fed with a heated regenerated catalyst through an upper opening delimiting a catalyst-flow section S.sub.1, and a descending-flow reaction area, in which the solid-gas mixture emanating from the mixing chamber is poured through an intermediate opening having a section S.sub.3 located in the lower part of said chamber. The ratios S.sub.2 /S.sub.1 and S.sub.2 /S.sub.3 have values of between 1.5 and 8.
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