双功能聚合离子液体催化水合制乙二醇的反应链调控机制

项目名称： 双功能聚合离子液体催化水合制乙二醇的反应链调控机制

项目编号： No.21506226

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 有机化学

项目作者： 徐菲

作者单位： 中国科学院过程工程研究所

项目金额： 21万元

中文摘要： 乙二醇被誉为21世纪有机合成的“新基石”，但是其传统的直接水合法制备工艺存在水比高、流程长、效率低和能耗大等问题。本项目拟设计、合成三类（直链型、侧链型、星型）双功能聚合离子液体，使其先作为吸附剂与二氧化碳作用，将形成的含羧酸根负离子的二氧化碳加合物再作为催化剂，用于催化环氧乙烷直接合成乙二醇的反应链。考察聚合离子液体微观结构（骨架结构、聚合度、特殊官能团）对催化性能及二氧化碳吸附性能的影响。采用实验和量化理论计算相结合的方法，研究离子液体催化环氧乙烷生成乙二醇的反应链机理。最后基于该反应链，探索环氧乙烷高效转化、乙二醇产物分离以及催化剂再生一体化的工艺过程，为高效温和制备乙二醇新工艺的开发提供理论基础和科学依据。

中文关键词： 聚合离子液体；；双功能；；结构调控；；催化水合；；乙二醇

英文摘要： Ethylene glycol is described as the new cornerstone of organic synthesis in the 21st Century. Its traditional process is non-catalytic hydration of ethylene oxide, while it suffers from drawbacks such as high water/ethylene oxide molar ratio, long technological process, low efficiency, high energy consumption and so on. This project aims to design and synthesis three kinds of dual functional poly(ionic liquid)s including straight chain-, side chain-, star shape-poly(ionic liquid)s. After their chemical fixation of carbon dioxide as adsorbents, carbon dioxide adducts are to be employed as efficient catalysts for the synthesis of ethylene glycol. The effects of backbone structures and special functional groups of poly(ionic liquid)s on catalytic and carbon dioxide fixation abilities will be investigated. And the reaction mechanism will be studied by combining the experiment results and quantitative theoretical calculation. Finally, this project will explore a new integration process of reaction, separation and catalyst regeneration, which will lay the theoretical and scientific foundation for the development of new efficient technology.

英文关键词： Poly(ionic liquid)s;Dual-function;Structure tuning;Catalytic hydration;Ethylene glycol