高温水协同相可控酸性离子液体催化木糖脱水制备糠醛的研究

项目名称： 高温水协同相可控酸性离子液体催化木糖脱水制备糠醛的研究

项目编号： No.21466001

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 华德润

作者单位： 赣南师范大学

项目金额： 50万元

中文摘要： 糠醛化学性质活泼，是一种重要的有机化工中间体。传统制备工艺使用硫酸、盐酸等液体强酸作为催化剂，存在诸多缺点，例如:使用量大、腐蚀设备、污染环境等。虽然，固体催化剂具有易分离、腐蚀小等优点。但是，固体酸不具有液体酸传质优的特点，催化效率低。针对传统液体酸和固体酸催化剂存在的不足，本课题拟采用离子液体取代液体和固体酸作为催化剂，乙酸丁酯取代传统甲苯有机溶剂对糠醛进行在线萃取。合成的离子液体具有高温易溶于水，从而具有液体酸催化剂传质好的优点；低温不溶于水，从而具有固体酸易分离的优点。而乙酸丁酯则有廉价、毒性小、可再生等优势。首先主要研究离子液体相分离性能与其结构关系，阴离子对催化性能的影响。然后考察反应条件对高温水-离子液体体系催化性能影响，优化反应条件，建立木糖脱水制备糠醛的动力学模型。研究木糖-糠醛-水-萃取剂的相行为，推导萃取剂对催化反应影响。

中文关键词： 木糖；糠醛；离子液体；催化；高温水

英文摘要： Furfural is a versatile and key intermediate in the bio-fuel chemistry and petrochemical industries. Conventional catalysts are liquid acid, which holds many serious drawbacks in terms of separation and recycling,as well as material corrosion.Solid acid catalysts have an advantage of separation and show high catalytic performance,and material corrosion is controlled, but catalytic efficiency is bad.Base on advantages of liquid and solid acids, a kind of ionic liquid is synthesized.Ionic liquid synthesized dissolve water at high temperature and is insoluble in water, and has easy separation and high efficiency. Then butyl acetate from degradation of biomass is used as extractant.Fist,the relation of phase separation of ionic liquid and structure is investigated, and effect of anion on catalytic performance of ionic liquid is investigated. Second, reaction conditions affect performance of the system of water-ionic liquid, and reaction conditions are optimized. Dynamic model is settled up. Last, the coking mechanism is deduced in according to coke compositions.

英文关键词： xylose;furfural;ionic liquid;catalysis;high temperature water