固载化离子液体催化酯化反应研究进展

固载化离子液体兼具载体材料高比表面积与离子液体的高催化活性等优点,不仅提升了离子液体的利用率,大幅度降低了离子液体的用量,而且可以显著提高离子液体在酯化反应中的催化活性。本文主要综述了固载化离子液体在催化酯化反应方面的研究进展,分别介绍了以硅胶、介孔分子筛、磁性介孔二氧化硅纳米材料以及高分子等为载体的固载化离子液体在酯化反应中的催化性能,简要分析了固载化离子液体催化酯化反应的机理与影响固载化离子液体催化活性的因素,并对固载化离子液体目前存在的问题以及今后的发展方向进行了总结,建立系统的载体与离子液体的构效关系,并对其性能进行长期的工业评测是今后的主要努力方向。

Progress in the application of immobilized ionic liquids in esterification reactions

Immobilized ionic liquids have advantages of both high surface area to volume ratio of the carrier material and high catalytic activity of ionic liquids,which can improve not only the utilization efficiency of the ionic liquids,resulting reduced amount of ionic liquids,but also the catalytic reactivity of the ionic liquids in the esterification reaction. This article mainly reviews the application of immobilized ionic liquids in esterification reactions,and the catalytic performance of the immobilized ionic liquids,supported individually by silica gel,mesoporous molecular sieve,magnetic mesoporous silica nano-materials and high polymer,are introduced. Then the catalytic mechanism of the immobilized ionic liquid on the esterification reaction and the factors that affect the catalytic reactivity of the immobilized ionic liquids are discussed briefly. The unsolved problems of immobilized ionic liquids and the future development direction are proposed,including establishing systematic structure-activity relationship of carrier and ionic liquid and its long-term industrial performance evaluation.