Process for the production of alkylate gasoline from FCC light aliphatics

摘要

This invention provides a process for upgrading hydrocarbon feedstock comprising the steps of: (i) recovering a C4-rich aliphatic stream from a catalytic cracking process; (ii contacting said C4-rich aliphatic stream with an isomerization catalyst comprising a zeolite sorbing 30 to 55 mg n-hexane at 90 DEG C., 83 torr, and 15 to 40 mg 3-methylpentane at 90 DEG C., 90 torr, per g dry zeolite in the hydrogen form in a first reaction stage to selectively isomerize C4 n-olefins to C4 isoolefins; and (iii) contacting the product stream from said first reaction stage with a solid acid alkylation catalyst selected from the group consisting of MCM-36 and MCM-49, as described herein and zeolites having a Constraint Index of less than or equal to about 2, to produce isoparaffinic alkylate gasoline.