阅读说明：本技术 通过用溶剂/水混合物洗涤来回收丙烯 (Propylene recovery by washing with solvent/water mixtures ) 是由 N·T·沃兹 U·穆勒 A-N·帕乌莱斯库 D·里德尔 M·克兰普 D·乌尔班奇克 U· 于 2018-04-13 设计创作，主要内容包括：本发明涉及制备环氧丙烷的方法,其包括(i)提供包含丙烯、丙烷、过氧化氢或过氧化氢源、水和有机溶剂的物流；(ii)使(i)中提供的液体进料物流进入包括含钛沸石的环氧化催化剂的环氧化区,并使液体进料物流在环氧化区中经受环氧化反应条件,获得包含丙烯、丙烷、环氧丙烷、水和有机溶剂的反应混合物；(iii)从环氧化区移出流出物流,该流出物流包含丙烯、丙烷、环氧丙烷、水和有机溶剂；(iv)通过蒸馏从流出物流中分离出丙烯和丙烷,包括使流出物流在蒸馏装置中经受蒸馏条件,获得与经受蒸馏条件的流出物流相比富含丙烯和丙烷的气体物流(S1),和与经受蒸馏条件的流出物流相比富含环氧丙烷、水和有机溶剂的液体底部物流(S2)；(v)在分离区中,从物流(S1)中分离出丙烷,包括使物流(S1)在洗涤器中经受洗涤条件,其中添加包含有机溶剂和水的溶剂混合物作为夹带剂,获得底部物流(S3),其包含有机溶剂、水和至少70重量％的(S1)中所含的丙烯；和气体顶部物流(S4),其包含至少5重量％的物流(S1)中所含的丙烷。(The present invention relates to a process for the preparation of propylene oxide comprising (i) providing a stream comprising propylene, propane, hydrogen peroxide or a source thereof, water and an organic solvent; (ii) (ii) passing the liquid feedstream provided in (i) to an epoxidation zone comprising an epoxidation catalyst comprising a titanium-containing zeolite and subjecting the liquid feedstream to epoxidation reaction conditions in the epoxidation zone to obtain a reaction mixture comprising propene, propane, propene oxide, water and an organic solvent; (iii) removing from the epoxidation zone an effluent stream comprising propylene, propane, propylene oxide, water and organic solvent; (iv) separating propylene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit to obtain a gaseous stream enriched in propylene and propane compared to the effluent stream subjected to distillation conditions (S1), and a liquid bottoms stream enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions (S2); (v) separating propane from the stream (S1) in a separation zone comprising subjecting the stream (S1) to washing conditions in a washer, wherein a solvent mixture comprising an organic solvent and water is added as entrainer, obtaining a bottom stream (S3) comprising organic solvent, water and at least 70 wt% of the propylene contained in (S1); and a gaseous overhead stream (S4) comprising at least 5 wt% of the propane contained in stream (S1).)