SO_4^(2-)/TiO_2-Al_2O_3催化均四甲苯氧化副产物与异辛醇反应

Esterfication of by-products in oxidization reaction of durene and iso-octyl alcoholcatalyzed by solid superacid SO^2-_4/TiO_2-Al_2O_3

以均四甲苯氧化反应副产物预处理后得到的混合酸和异辛醇为原料,在固体超强酸SO24-/TiO2A l2O3作用下进行合成混合酯的研究。考察了催化剂用量、异辛醇与混合酸的质量比、反应时间等因素对酯化反应的影响,确定了较佳的反应工艺条件:m(催化剂)∶m(异辛醇)∶m(混合酸)=0.01∶3.18∶1,反应时间为3 h,在此反应条件下预处理后的混合酸转化率可达到99.9%。

Solid superacids SO4^2-/TiO2-Al2O3 were prepared and used to catalyze the esterfication of iso-octyl alcohol and by-products in oxidization reaction of durene, which were pretreated before esterifying reaction. Influencing factors on the mixing acid conversion, such as the usage of catalyst, ratio of iso-octyl alcohol to mixing acid, reactive time, were investigated. The optimum reactive conditions are： ratio of usage of catalyst to isooctyl alcohol to mixing acid 0. 01： 3. 18： 1, the reaction time 3 hours. Under the optimum conditions, the conversion of the mixing acid is up to 99. 9%.