疏水离子液体/水两相体系中CO2与醇反应合成碳酸酯的研究

项目名称： 疏水离子液体/水两相体系中CO2与醇反应合成碳酸酯的研究

项目编号： No.21303224

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 马珺

作者单位： 中国科学院化学研究所

项目金额： 25万元

中文摘要： CO2转化为重要化学品具有资源合理利用和环境保护双重意义。有机碳酸酯是一类重要化学品，CO2与醇反应合成这类化学品具有广阔的前景，但由于目前反应平衡转化率和效率低等原因，一直没有得到实际应用。本项目拟采用新的思路，在疏水离子液体/水两相反应介质中进行此类反应。一方面利用CO2在水中可以生成碳酸的性质，通过碳酸与醇的酯化反应生成有机碳酸酯，避免CO2直接活化难的动力学问题；同时，利用疏水离子液体对有机碳酸酯溶解能力很强特性，将水相中生成的有机碳酸酯萃取到离子液体相中，从而有效移动反应的化学平衡，提高平衡转化率。通过系统研究，揭示反应温度、CO2压力、时间、醇的种类、酸催化剂的性质、离子液体的结构、离子液体与水体积比等对反应的影响规律和机理，探明这类介质中的反应机制以及离子液体和水的耦合规律，有效解决此类反应的热力学和动力学难题，优化反应条件，为发展CO2高效清洁利用的新途径奠定科学基础。

中文关键词： 二氧化碳转化；离子液体；水；重要化学品；

英文摘要： The conversion of CO2 to valuable products benefits both environmental protection and rational utilization of the resources. As a kind of important chemicals, carbonates can be synthesized from CO2 and alcohols directly. However, this synthesis route has never been industrialized because of low efficiency and low yield limited by thermodynamic equilibrium. In this project, as a new design, the reaction of CO2 with alcohols will be carried out in the hydrophobic ionic liquid / water biphasic systems. In order to avoid the difficulties in direct activation of CO2, the carbonates will be synthesized via the esterification reaction of alcohols and carbonic acid. On the other hand, carbonates have strong solubility in the hydrophobic ionic liquids, which will effectively extract carbonates away from water and enhance the conversion rate of this kind of reaction. Systematic investigations are to be carried out to identify the reaction characteristics influenced by temperature, pressure, timing, alcohols, catalysts, ionic liquid structures, ionic liquid to water volume ratios, etc. The coupling character between ionic liquid and water and the reaction mechanism are to be elucidated. Obstacles in both thermodynamics and kinetics are to be tackled and optimal reaction conditions are to be devised to lay a foundation for

英文关键词： conversion of CO2；ionic liquide；water；important chemicals；