Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1984-07-18
1986-08-12
Metz, Andrew H.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208153, 208164, C10G 1118
Patent
active
046054910
ABSTRACT:
A method and apparatus for improving the stripping of hydrocarbons from catalyst particles in a fluidized catalytic cracking (FCC) unit. A stripper vessel has catalyst particles entering at one end and stripped catalyst particles exiting at another end. While passing through the stripper, the catalyst particles are exposed to a stripping gas, in a preferred embodiment steam, at each stage. A baffle and conduit system is provided, such that after exposure to only a portion of catalyst contained above the steam injection location in the stripper, the stripping gas and any stripped hydrocarbons are removed from any further substantial catalyst contact. The short contact time (SCT) stripper, in other embodiments, can be combined with one or more of a riser conversion zone deflector, a stripper mount in or adjacent the exhaust barrel of a separator, and/or a catalyst seal pot, all serving to reduce "residence" time of hydrocarbons with catalyst particles.
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Haddad James H.
Owen Hartley
Caldarola Glenn A.
Gilman Michael G.
McKillop Alexander J.
Metz Andrew H.
Mobil Oil Corporation
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