Riser disengager with suspended catalyst separation zone

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed

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422145, 422147, B01J 826

Patent

active

054179319

ABSTRACT:
This FCC process suspends a layer of catalyst in a riser proximate or above the riser outlets. The density at the riser outlets is higher than the flowing density in the riser. The suspended catalyst provides a disengagement zone that enhances the separation of catalyst from product vapors. The riser operates in a manner that prevents any discharge of catalyst from its end. The arrangement also provides a convenient method for venting stripping vapors into a closed reactor cyclone system.

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patent: 4572780 (1986-02-01), Owen et al.
patent: 4678642 (1987-07-01), Lee
patent: 4737346 (1988-04-01), Haddad et al.
patent: 4786622 (1988-11-01), Walters et al.
patent: 4792437 (1988-12-01), Hetinger, Jr.
patent: 4869880 (1989-09-01), Hettinger, Jr. et al.

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