Guard-bed vapor bypass to overcome pressure drop in mixed-phase

Details Guard-bed vapor bypass to overcome pressure drop in mixed-phase Guard-bed vapor bypass to overcome pressure drop in mixed-phase

1978-09-25

1980-11-18

Marcus, Michael S.

Chemistry: physical processes

Physical processes

Crystallization

422110, 422111, 422112, 208DIG1, 208146, G01N 700, G01D 700, G01D 1600

Patent

active

042343143

ABSTRACT:
In a mixed-phase hydrocarbon hydroprocessing catalytic reaction system, wherein a guard-bed of particulate matter is employed above one or more individual beds of catalyst particles, the adverse detrimental effects of excessive reaction zone pressure drop are overcome by sensing the differential pressure across the guard-bed. Vaporous stream components are withdrawn from the reaction chamber through a locus above the guard-bed and at a rate proportional to the differential pressure. These withdrawn vaporous components are reintroduced into a substantially particle-free void volume below the guard-bed and above the bed of catalyst particles.

REFERENCES:
patent: 3128129 (1964-04-01), Stine et al.
patent: 3509043 (1970-04-01), McMaster et al.
patent: 3598539 (1971-08-01), Pizzato
patent: 3607000 (1971-09-01), Beal et al.
patent: 3685971 (1972-08-01), Carson
patent: 3981797 (1976-09-01), Kellar

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