Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1988-10-18
1990-01-23
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208 52CT, 208149, 208160, 208251R, 208121, C10G 1118
Patent
active
048956376
ABSTRACT:
This application is directed to a process and apparatus for regenerating an elutriable mixture of fluidized catalytic cracking (FCC) catalyst and a demetallizing additive. Deactivated catalyst and coke containing additive are added to a single dense bed regenerator. Within the regenerator, differences in settling velocity segregate the elutriable mixture into a lower dense bed containing most of the additive and a contiguous upper dense bed containing most of the FCC catalyst. Some regeneration gas is added to the lower dense bed to at least partially decoke the additive, while additional regeneration gas is added to the upper dense bed. Decoked additive and regenerated FCC catalyst are preferably withdrawn separately and charged to a riser reactor for demetallizing and catalytic cracking of heavy feed. Flue gas is withdrawn from the regenerator from a dilute phase vapor space above the single dense bed.
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patent: 2763596 (1956-09-01), Feldbauer
patent: 2877175 (1959-03-01), MacLaren
patent: 2894902 (1959-07-01), Nicholson
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McFarlane Anthony
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Stone Richard D.
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