Al P Ti Si O体系催化剂由甲醇和邻苯二酚制备愈创木酚的反应具有较好的催化性能。本文详细考察了制备催化剂所用原料、制备方法和焙烧温度对催化剂性能的影响。结果表明 ,分别以自制新鲜氢氧化铝为铝源、硅溶胶为硅源、钛酸丁酯为钛源、磷酸为磷源时 ,采用不均匀沉淀法制备的催化剂 ,经 5 73K焙烧后 ,其邻苯二酚转化率和主产物收率分别可达到约 96 %和 90 %。
POM-LDHs with the composition of MAI-XW11ZO39(M=Zn, Mg; X=P, Si; Z=Mn2+, Fe2+, Co2+, Ni2+, Cu2+) were synthesized, and their catalytic properties for oxidation of cyclohexene in the presence of dioxygen were studied. The results obtained show that the oxidation of cyclohexene gives mainly α-H oxidation products, and the reaction activities greatly depend on the nature of the substituted transition metals in the POM pillars, i. e.,with different Z ions, the activity is in the order: Co2+～Cu2+～Mn2+》Ni2+～Fe2+. In addition, the central atom in the POM pillars has some effects on the oxidation of cyclohexene.The activity increases when P is used instead of Si. No obvious difference between the activities of ZnAl and MgAl layers were observed.
