Patent ID: 7083762

Claim:
A hydrocarbon conversion apparatus, comprising: (a) a plurality of riser reactors, each having a first end into which a catalyst can be fed, and a second end through which the catalyst can exit; (b) a separation zone having a plurality of inlets, the separation zone being provided to separate the catalyst from products of a reaction conducted in the hydrocarbon conversion apparatus; (c) a plurality of deviating members, each deviating member being a curved pipe, elbow or conduit device attached to the second end of a riser reactor so as to receive catalyst, products and unreacted feed and deviate flow of the catalyst, products and unreacted feed toward a respective inlet of the separation zone, wherein each of the plurality of riser reactors includes a center axis extending between the first and second ends thereof, and wherein the plurality of inlets are not oriented along the center axes of the riser reactors; (d) a catalyst retention zone provided to contain catalyst, which can be fed to the riser reactors; and (e) a catalyst return in fluid communication between the separation zone and the catalyst retention zone.