KF/Al2O3的制备、表征及催化合成乙二醇丙烯基醚

采用浸渍法制备KF/Al2O3固体碱催化剂,催化丙烯醇与环氧乙烷（EO）反应合成乙二醇丙烯基醚。考察了催化剂焙烧温度、氟化钾（KF）负载量对催化性能的影响,并采用X-射线衍射（XRD）、扫描电镜（SEM）等对催化剂进行了表征。结果表明：KF负载量为30%,焙烧温度为550℃时,催化剂对丙烯醇和EO反应的催化活性最高。KF/Al2O3固体碱催化剂用于催化合成乙二醇丙烯基醚的最佳工艺条件为：反应温度100℃,反应压力为0.20-0.35MPa,催化剂用量为1.5%,n（丙烯醇）∶n（EO）为5∶1,反应时间为2h,EO转化率达97.35%。

Preparation and Characterization of KF/AI203 Catalyst and its Application in Synthesis of 2--Allyloxyethanol

The KF/Al2O2 solid base catalysts were prepared via impregnation method for catalytic synthesis of 2-- allyloxyethanol from allyl alcohol and ethylene oxide （EO）. The influences of calcination temperature and load capacity of KF of the catalysts were examined. The catalysts were characterized by X--ray diffraction （XRD）, scanning electron microscope （SEM） , etc. The results showed that the catalysts had good catalytic activity and uniform surface crystal under the conditions of catalyst calcination temperature was 550℃, loading amount of KF was 30 %. The optimal etherification condition was as follows： reaction temperature was 100 ℃, reaction pressure was 0.20--0. 35MPa, catalyst dosage was 1.5% and n （Ally1 alcohol） ： n （EO） was 5 ：1, reaction time was 120rain. Under such reaction conditions, the conversion of EO reached 97.35%.