Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Patent
1994-04-25
1995-07-25
Santiago, Amalia L.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
F27B 1510, F27B 1502
Patent
active
054359732
ABSTRACT:
A fluidized catalyst contacting apparatus improves the recovery of entrained hydrocarbon gases by providing a de-gassing zone upstream of a conventional stripping zone. The de-gassing zone has a downwardly increasing catalyst density gradient that reduces the void volume of the fluidized catalyst thereby de-gassing hydrocarbon vapors from the catalyst prior to entering a stripping zone. The de-gassing zone is particularly useful in a vented riser arrangement for an FCC reactor where catalyst concentrates along the wall of the reactor vessel as it flows downwardly into the stripping zone. By providing a de-gassing zone to collect the downwardly descending catalyst and remove hydrocarbon vapors, efficiency of a sub-adjacent stripping zone is significantly improved.
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McBride Thomas K.
Santiago Amalia L.
Tolomei John G.
UOP
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