论文部分内容阅读
以凹凸棒石(palygorskite,PAL)黏土为载体,采用共沉淀法制备了SO24-/ZrO2/Fe3O4/PAL固体酸催化剂。利用X射线衍射、透射电子显微镜、能谱和超导量子干涉仪对催化剂进行了表征,并用于催化乙酸正丁酯的反应,考察了Fe3O4、ZrO2含量和煅烧温度对催化剂活性的影响。结果表明:SO24-/ZrO2/Fe3O4/PAL固体酸催化剂具有较高的催化活性和较强的磁性能,磁性材料的引入提高了催化剂活性,对乙酸正丁酯的合成反应活性高达89.26%,使用4次后其酯化率还能达到74.53%。
SO42- / ZrO2 / Fe3O4 / PAL solid acid catalysts were prepared by coprecipitation using palygorskite (PAL) clay as carrier. The catalysts were characterized by X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy and superconducting quantum interference and used to catalyze the reaction of n-butyl acetate. The effects of Fe3O4, ZrO2 content and calcination temperature on the catalytic activity were investigated. The results showed that the SO24- / ZrO2 / Fe3O4 / PAL solid acid catalyst has high catalytic activity and strong magnetic properties. The introduction of magnetic material improves the catalytic activity, and the synthesis reaction activity of n-butyl acetate is as high as 89.26% After 4 times its esterification rate can reach 74.53%.