Facile Synthesis of Acetal Over a Supported Novel Brønsted and Lewis Acid Ionic Liquid Catalyst
作者:Ruifeng Liu、Liming Dai、Qian Zhao、Yingjie Xie、Tingshun Jiang
DOI:10.1166/jnn.2019.16370
日期:2019.8.1
ethylene glycol. The results demonstrated that the IL/Fe-SBA-15 catalysts were of higher catalytic activity compared to Fe-SBA-15. Under optimal conditions, the acetalization could reach to 92.6% cyclohexanone conversion with 99.3% acetal selectivity. After 5 cycles, the cyclohexanone conversion decreased slightly. Also, the catalyst showed good catalytic property in the other acetalization of cyclohexanone
通过水热法合成了一种新型的布朗斯台德和路易斯酸离子液体(IL)氯化丁内酰胺氯锌酸酯(CPCl-ZnCl 2),并通过傅里叶变换红外光谱(FT-IR)对其进行了表征。采用直接合成法制备了不同Si / Fe摩尔比的Fe-SBA-15介孔材料。通过湿式浸渍法制备了具有各种IL含量的负载型离子液体(IL / Fe-SBA-15),并通过X射线衍射(XRD),透射电子显微镜(TEM),X射线光电子能谱(XPS)进行了表征和N 2物理吸附。使用吡啶作为探针通过FT-IR光谱法测量酸度。在环己酮与乙二醇的缩醛化反应中测试了催化性能。结果表明,与Fe-SBA-15相比,IL / Fe-SBA-15催化剂具有更高的催化活性。在最佳条件下,缩醛化反应可以达到92.6%的环己酮转化率,缩醛选择性为99.3%。5个循环后,环己酮转化率略有下降。另外,该催化剂在环己酮和苯甲醇的另一缩醛化反应中显示出良好的催化性能。