Installation for the fluidized-bed catalytic cracking of a hydrocarbon feedstock
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United States of America Patent
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Oct 1, 1991
Grant Date -
N/A
app pub date -
Jan 26, 1989
filing date -
Jan 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an installation for the fluidized-bed cracking of a hydrocarbon feedstock. In accordance with the invention recycling of the regenerated catalyst particles to the intake of the reactor comprise, from upstream to downstream, a preferably substantially vertical pipe (1) for the discharge of the regenerated particles from the regenerator, and a substantially straight pipe (2) connected to the vertical pipe (1) and sloping downward therefrom to the base (3) of the reactor to which it is connected, the downward-sloping pipe (2) being connected to the vertical pipe (1) and to the base (3) of the reactor through inward-curved portions or elbows which impose neither a sharp change in direction on the course of the particles nor sudden changes in the diameter of the pipes.
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