Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1992-11-27
1994-05-31
Springer, David B.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208162, C10G 1118
Patent
active
053166574
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 vessle 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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Oil & Gas Journal, p. 102, May 15, 1972 edition & p. 65, Oct. 8, 1973 edition.
McBride Thomas K.
Springer David B.
Tolomei John G.
UOP
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