FCC process for converting C3/C4 feeds to olefins and aromatics

Details FCC process for converting C3/C4 feeds to olefins and aromatics FCC process for converting C3/C4 feeds to olefins and aromatics

2006-12-29

2009-11-03

Hill, Jr., Robert J (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural parallel stages of chemical conversion

C208S049000, C208S067000, C208S120010

Reexamination Certificate

active

07611622

ABSTRACT:
A dual riser FCC process for converting C3/C4-containing feedstocks to aromatics. First and second hydrocarbon feeds (5, 6) are supplied to the respective first and second risers (2, 4) in a dual-riser FCC unit with a gallium enriched catalyst to make an effluent rich in ethylene, propylene and aromatics. The first riser (2) is operated at less severe conditions than the second riser (4) and can receive a relatively heavy feed such as gas oil. The feed to the second riser (4) includes propane, for example LPG, propane recycle from the C3 splitter (72), etc. The FCC catalyst can include gallium to promote aromatics formation.

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