Patent ID: 9133077
Filing Date: 2015-09-15
Classification: C07C,Y02P

Abstract:
1. A process for the preparation of an olefin product comprising ethylene, which process comprises the steps of: a. converting an oxygenate feedstock in an oxygenate-to-olefins conversion system, comprising a reaction zone in which an oxygenate feedstock is contacted with an oxygenate conversion catalyst under oxygenate conversion conditions, to obtain a conversion effluent comprising ethylene and propylene; b. separating at least a portion of the propylene from the conversion effluent to form a propylene stream; c. separating the remainder of the olefins from the conversion effluent; and d. recycling at least a portion of the propylene stream to step a) wherein the amount of recycled propylene to step a) is at least 5 wt %, calculated as the total feed to the oxygenate-to-olefins conversion system.