A process for the production of high octane number gasoline from light
refinery olefins and benzene-containing aromatic streams such as
reformate. Light olefins including ethylene and propylene are extracted
from refinery off-gases, typically from the catalytic cracking unit, into
a light aromatic stream such as reformate containing benzene and other
single ring aromatic compounds which is then reacted with the light
olefins to form a gasoline boiling range product containing
akylaromatics. The alkylation reaction is carried out in the liquid phase
with a catalyst which preferably comprises a member of the MWW family of
zeolites such as MCM-22 using a fixed catalyst bed.