以下为句子列表：
英文: In dilute solution of aprotic dipolar solvent, using potassium ion as template, 8 - crown - was synthesized by using triethylene glycol and ,- dioxa -,8- dichlorooctane as raw materials, and purified via 8 - crown - -MeNO (:) complex.
中文: 用钾离子为模板,采用稀释法,以三甘醇和 ,-二氧-,8-二氯辛烷为原料,经Williamson反应合成了8-冠-,并用硝基甲烷进行提纯。
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英文: Study on Preparation, Dilute Solution Property of Membrane Materials and Pervaporation Behavior of Their Membranes for Organic Mixtures (MeOH/MTBE、Benzene/Cyclohexane)
中文: 有机混合物（苯/环己烷、甲醇/MTBE）渗透汽化膜材料的制备、溶液性质及其分离性能
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