| 摘要 |
Methods for producing light olefins are provided. An exemplary method includes providing an oxygenate compound capable of converting to light olefins in a catalytic reaction or to a clean reaction intermediate compound of the catalytic reaction and converting the oxygenate compound to the clean reaction intermediate compound in a chemical reaction. The chemical reaction produces a gas-phase product comprising the clean reaction intermediate compound, unconverted oxygenate, and a reaction byproduct. The method further includes cooling the gas-phase product to condense unconverted oxygenate and reaction byproduct while maintaining the clean reaction intermediate compound in a gas phase and separating the clean reaction intermediate compound, the unconverted oxygenate, and the reaction byproduct into a first stream including the clean reaction intermediate compound and a second stream including the unconverted oxygenate and the reaction byproduct. Still further, the method includes contacting the first stream with a catalyst configured for producing light olefins.
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