Process for the conversion of oxygenates to olefins

摘要

The present invention relates to a process for the conversion of oxygenates to olefins comprising
(i) providing a gas stream comprising one or more oxygenates; and(ii) contacting the gas stream with a catalyst;

wherein the catalyst comprises a zeolitic material having an MFI, MEL, and/or MWW-type framework structure comprising YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element,

said zeolitic material being obtainable and/or obtained according to a method comprising
(1) preparing a mixture comprising one or more sources for YO2, one or more sources for X2O3, and one or more solvents; and(2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material having an MFI, MEL and/or MWW-type framework structure;

wherein the mixture crystallized in step (2) contains 3 wt.-% or less of the one or more elements M based on 100 wt.-% of YO2, wherein M stands for sodium.

主权项

1. A process for the conversion of oxygenates to olefins comprising
(i) providing a gas stream comprising one or more oxygenates; and (ii) contacting the gas stream with a catalyst at conditions effective to convert the oxygenates to olefins; wherein the catalyst comprises a zeolitic material having an MFI, MEL, and/or MWW framework structure comprising YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element, said zeolitic material prepared by a process comprising (1) preparing a mixture comprising one or more sources for YO2, one or more sources for X2O3, and one or more solvents; (2) heating the mixture obtained in step (1) to obtain a product mixture including the zeolitic material, wherein the zeolitic material contains 3 wt.-% or less of one or more elements M, based on 100 wt.-% of YO2, wherein M in as alkali or alkaline earth element; isolating the zeolitic material from the product mixture obtained in (2); and subjecting the zeolitic material to a hydrothermal treatment under autogenous pressure; wherein the provided gas stream of step (i) includes from 30 to 70 vol. % of oxygenates, and from 30 to 60 vol. % water, based on the total volume the gas stream.