Patent ID: 9035120
Filing Date: 2015-05-19
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A process of making light olefins from an oxygen containing, halogenide containing or sulphur containing organic feedstock, comprising: selecting a zeolite in the H steaming the zeolite at a temperature ranging from 480° C. to 760° C. for 0.01-200 hours; after steaming, leaching the zeolite with an aqueous acid solution at conditions effective to remove a substantial part of Al from the zeolite; after leaching, introducing phosphorus (P) to the zeolite with an aqueous solution containing a source of P at conditions effective to introduce at least 0.05 wt % to 7 wt % of P, obtaining a first P modified zeolite; contacting the oxygen containing, halogenide containing, or sulphur containing organic feedstock in a first reactor with a first catalyst comprising the first P modified zeolite at conditions effective to convert at least a portion of the feedstock to form a first reactor effluent comprising light olefins and a heavy hydrocarbon fraction; sending the first reactor effluent to a first fractionator and separating the light olefins from the heavy hydrocarbon fraction in the first fractionator, wherein the light olefins from the first fractionator comprise ethylene and propylene, and wherein the separated light olefins are recovered; contacting the separated heavy hydrocarbon fraction in a second reactor with a second catalyst made from a second P modified zeolite, wherein the second P modified zeolite catalyst is the same as the first P modified zeolite catalyst, at conditions effective to convert at least a portion of the heavy hydrocarbon fraction to light olefins; and sending the second reactor effluent to a second fractionator and separating the light olefins from the heavy hydrocarbon fraction in the second fractionator, wherein the separated light olefins from the second fractionator comprise ethylene and propylene.