酸功能化离子液体的制备及催化合成邻苯二甲酸二辛酯性能研究

制备了[HSO3-pmim][HSO4]、[HSO3-pmim][pTSA]、[HSO3-pPydin][HSO4]、[HSO3-pTEA][HSO4]4种酸功能化的离子液体,并以邻苯二甲酸二辛酯(DOP)的合成反应为模型,考察其催化和重复使用性能。结果表明,磺酸基功能化的离子液体都具有较好的催化活性和重复使用性能。其中[HSO3-pmim][HSO4]的催化活性和重复使用性能最佳。在较佳反应条件下,苯酐转化率大于98%,分出的离子液体未经任何处理重复使用8次后,苯酐转化率没有明显降低。

Preparation of Acidic Functionalized Ionic Liquids in Catalytic Synthesis of DOP

The acid functionalized ionic liquids,[HSO3-pmim],[HSO3-pmim],[HSO3-pPydin],and [HSO3-pTEA],were prepared and used as catalyst in the synthesis of dioctyl phthalate(DOP).The catalytic property and reusability of the acid functionalized ionic liquids were examined.The results indicated that they were of better catalytic and reusable performance than the traditional method.Among them,the catalytic and reusable performance of [HSO3-pmim] is the best.Under the optimal condition as using [HSO3-pmim] as the catalyst,the conversion of phthalic anhydride was over 98%.After the catalyst was separated from the reaction mixture and reused for 8 times without any processing,the catalytic function was no obviously compromised in the conversion of phthalic anhydride.