Patent ID: 7842253

Claim:
A system comprising: a multi-zone alkylation reactor comprising a first reaction zone and a second reaction zone, operably related to each other such that a first reaction zone effluent passes to said second reaction zone from said first reaction zone; first conduit means operably related in fluid flow communication to said first reaction zone for introducing a first olefin stream into said first reaction zone; second conduit means operably related in fluid flow communication to said first reaction zone for introducing a portion of a fresh isobutane stream into said first reaction zone; third conduit means operably related in fluid flow communication to said second reaction zone for introducing a second olefin stream into said second reaction zone; fourth conduit means operably related in fluid flow communication to said second reaction zone and to said second conduit means for introducing a portion of said fresh isobutane stream into said second reaction zone; fifth conduit means operably related in fluid flow communication to said second reaction zone and operably related to a settler vessel for transport of a second reaction zone effluent to said settler vessel for separation into a hydrocarbon phase and an acid phase; sixth conduit means operably related in fluid flow communication to said settler vessel and to said second reaction zone for transporting a portion of said hydrocarbon phase as a settler effluent stream from said settler vessel to said second reaction zone; and seventh conduit means operably related in fluid flow communication to said settler vessel and to said first reaction zone for transporting at least a portion of said acid phase as an alkylation catalyst stream to said first reaction zone.