固体超强酸于多孔高硅氧纤维的负载及其在酯化中的应用

摘要

以溶胶浸渍法,将SO42-/ZrO2固体超强酸负载到由酸沥滤工艺制备的多孔高硅氧纤维上,并用于催化合成乙酸正丁酯。研究结果表明,该催化剂具有用量少,酯收率较高,产物易于分离等优点;而且使用寿命长,重复用于5次合成后,酯化率仍高于70%。%E-glass fibers were acid-leached to prepare porous silica fibers.The fibers were impregnated with sol and heat-treated to produce SO2-4/ZrO2 solid superacid catalyst.This catalyst was used in the synthesis of n-butyl acetate.It had been found that the solid catalyst has high surface area and high activity.It is more effective than liquid superacid or nano-powder supported solid superacid.Consequently,the catalyst consumption can be reduced and the yield of esterification is improved.Moreover,this catalyst can be recovered easily by filtration.After 5 times of recovery,the catalyst can still give a good esterification yield of over 70%.