Process to make olefins from organics

摘要

The present invention relates to a process to make light olefins, in a combined XTO-OC process, from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock comprising:
a0) providing a first portion and a second portion of said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock,a) providing a catalyst comprising zeolitic molecular sieves containing at least 10 membered ring pore openings or larger in their microporous structure,b) providing an XTO reaction zone, an OC reaction zone and a catalyst regeneration zone, said catalyst circulating in the three zones, such that at least a portion of the regenerated catalyst is passed to the OC reaction zone, optionally at least a portion of the catalyst in the OC reaction zone is passed to the XTO reaction zone and at least a portion of the catalyst in the XTO reaction zone is passed to the regeneration zone;c) contacting the first portion of said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the XTO reactor with the catalyst at conditions effective to convert at least a portion of the feedstock to form a XTO reactor effluent comprising light olefins and a heavy hydrocarbon fraction;d) separating said light olefins from said heavy hydrocarbon fraction;e) contacting said heavy hydrocarbon fraction and the second portion of said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the OC reactor with the catalyst at conditions effective to convert at least a portion of said heavy hydrocarbon fraction and oxygen-containing, halogenide-containing or sulphur-containing organic feedstock to light olefins.

主权项

1. A process of making light olefins, in a combined organics to olefins (XTO)-olefins conversion (OC) process, from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock 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 a first portion and a second portion of a feedstock that is an oxygen-containing, halogenide-containing, or sulphur-containing organic feedstock; providing an XTO reaction zone, an 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 are passed to the OC reaction zone; contacting the first portion of the 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 reactor effluent comprising light olefins and a heavy hydrocarbon fraction; separating the light olefins from the heavy hydrocarbon fraction; and contacting the heavy hydrocarbon fraction and the second portion of the feedstock 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 and the feedstock to light olefins.