Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-08-21
1981-09-01
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
208 52CT, 208251H, 209158, 209172, 252412, 252420, B01J 2394, B01J 2120, B03B 528, B03B 566
Patent
active
042870887
ABSTRACT:
This invention provides a process and system for the segregation of used catalyst contaminated by the extended processing of hydrocarbon feedstocks. It utilizes multi-stage fluidization and segregation of the catalyst in an upflowing liquid, and recovery of the less contaminated catalyst upper fraction for reuse. The recovery vessel comprises at least two concentric compartments, either or both of which may preferably be tapered so as to provide less cross-sectional area at the upper end of the catalyst bed for improved fluidization of the used catalyst. The used catalyst material is usually introduced into the annulus between the vessel walls, and the lower density less contaminated fraction is accumulated within the inner compartment, from which it is withdrawn for reuse.
REFERENCES:
patent: 2429436 (1947-10-01), Walker
patent: 2567207 (1951-09-01), Hoge
patent: 2631968 (1953-03-01), Peery
patent: 2688401 (1954-09-01), Schmitkons et al.
patent: 2746603 (1956-05-01), Blumdelle
patent: 3541002 (1970-11-01), Rapp
patent: 3887455 (1975-06-01), Hammer et al.
Hydrocarbon Research Inc.
Konopka P. E.
Mallare Vincent A.
Wilson Fred A.
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