Process to control conversion of C4+ and heavier stream to lighter products in oxygenate conversion reactions

A method for converting an oxygenate feedstock to an olefin product comprising:

• contacting an oxygenate feedstock with silicoaluminophosphate catalysts in a first reaction zone of a reactor system under conditions effective to produce a first olefin product stream comprising light olefins and C4+ olefins;
• directing at least a portion of the catalysts from the first reaction zone and the first olefin product stream to a second reaction zone;
• directing at least a portion of the catalysts in the second reaction zone to a regenerator;
• regenerating the at least a portion of the catalysts in the regenerator to form regenerated catalysts;
• directing the regenerated catalysts from the regenerator to the second reaction zone;
• and
• contacting the first olefin product stream with at least a portion of the,regenerated catalysts in the second reaction zone of the reactor system wherein C4+ olefins are converted to light olefins, thereby producing a final olefin product.