Multiple riser reactor with centralized catalyst return

A hydrocarbon conversion process, comprising the steps of:

• (a) contacting a fluidizable catalyst with a fluidizing agent to fluidize the fluidizable catalyst;
• Step (b):
• feeding the catalyst and a feed to a plurality of riser reactors, each riser having a first end into which the catalyst can be fed and a second end through which the catalyst can exit, the plurality of riser reactor being part of a single hydrocarbon conversion apparatus;
• (c) contacting the feed with the catalyst in the plurality of riser reactors under conditions effective to convert the feed to a product;
• Step (d):
• directing the product and the catalyst through a plurality of deviating members, each deviating member being positioned to deviate a flow of the product and the catalyst from the second end of each riser reactor to a 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;
• Step (e):
• separating the catalyst from the product in the separation zone having a plurality of inlets, the separation zone being in fluid communication with the plurality of deviating members, a catalyst retention zone, and a catalyst return;
• (f) returning the catalyst from the separation zone to the plurality of riser reactors;
• and
• (g) repeating steps (a) to (f).