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Recovery of ethylene and propylene from a methanol to olefin reaction system

机译:从甲醇制烯烃反应体系中回收乙烯和丙烯

摘要

The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetylene, methyl acetylene, propadiene, methane, hydrogen, carbon monoxide, carbon dioxide and C4+ components. In one embodiment, the initial effluent stream is provided from a methanol-to-olefin reaction system. It has been discovered that an efficient separation of these components is realized when DME is partially removed in a first separation step comprising methanol and water washing steps, followed by separation of the remaining components in additional separation steps.
机译:本发明提供了用于从包括乙烷,乙烯,丙烯,二甲基醚和丙烷,乙炔,甲基乙炔,丙二烯,甲烷中的一种或多种的初始流出物中分离出聚合级乙烯和丙烯的新型高效分离方法和系统。 ,氢,一氧化碳,二氧化碳和C 4 +组分。在一个实施方案中,初始流出物流是由甲醇-烯烃反应系统提供的。已经发现当在包括甲醇和水洗涤步骤的第一分离步骤中部分除去DME,然后在另外的分离步骤中分离剩余的组分时,实现了这些组分的有效分离。

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