Patent ID: 9573860
Date: 2017-02-21
CPC Classifications: B01J,C07C,C10G,Y02P

Claim:
1. A process of making light olefins comprising: selecting a molecular sieve having pores of 10- or more-membered rings, wherein the molecular sieve is a zeolite; contacting the molecular sieve with a metal silicate, different from said molecular sieve, comprising at least one alkaline earth metal to form a catalyst composite, wherein the catalyst composite comprises at least 10 wt % of the zeolite and at least 0.1 wt % of silicate based on a total weight of the catalyst composite; providing an oxygen-containing, halogenide-containing, or sulphur-containing organic feedstock; providing an oxygenate to olefin (XTO) reaction zone, an olefin cracking (OC) reaction zone, and a catalyst regeneration zone, wherein one or more catalysts are in the XTO reaction zone and the same one or more catalysts are in the OC reaction zone, wherein at least one of the one or more catalysts is the catalyst composite; wherein the one or more catalysts circulate in the three zones, such that at least a portion of regenerated one or more catalysts is passed to the OC reaction zone, at least a portion of the one or more catalysts in the OC reaction zone is passed to the XTO reaction zone and at least a portion of the one or more catalysts in the XTO reaction zone is passed to the catalyst regeneration zone; contacting the oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the XTO reaction zone with the one or more catalysts at conditions effective to convert at least a portion of the feedstock to form an XTO reaction zone effluent comprising light olefins and a heavy hydrocarbon fraction; separating the light olefins from the heavy hydrocarbon fraction; and contacting the heavy hydrocarbon fraction in the OC reaction zone with the one or more catalysts at conditions effective to convert at least a portion of the heavy hydrocarbon fraction to light olefins.