固体超强酸SO_4^(2-)/Fe_2O_3催化甲基叔丁基醚与苯酚合成对叔丁基苯酚的研究  

Study on synthesis of p-tert-butylphenol from methyl tert-butyl ether with phenol catalyzed by solid superacid SO_4^(2-)/Fe_2O_3

作　　者：徐海云[1] 刘瑛[1] 

机构地区：[1]商丘师范学院化学系,河南商丘476000

出　　处：《商丘师范学院学报》2010年第3期67-71,共5页Journal of Shangqiu Normal University

基　　金：河南省科技厅科技攻关项目(082102210050);河南省教育厅自然科学研究计划项目(2008B150018)

摘　　要：制备了固体超强酸催化剂SO42-/Fe2O3,并依照傅-克烷基化反应的原理,以对叔丁基苯酚的合成为探针反应,考察了硫酸浸渍浓度、焙烧温度等制备条件对SO42-/Fe2O3催化活性的影响.实验表明:制备催化剂的适宜条件为硫酸的浸渍浓度为0.5 mol.L-1,焙烧温度为550℃,活化时间4 h.利用优化条件下制备的催化剂SO42-/Fe2O3催化甲基叔丁基醚与苯酚的烷基化反应合成对叔丁基苯酚,在苯酚与甲基叔丁基醚的投料摩尔比为1∶2.0,催化剂的用量占反应物总投料质量的4%,反应时间为3 h,反应温度为90℃下,烷基化反应收率为80.8%.A novel solid superacid catalyst, SO4^2-/Fe2O3 , was prepared. Its catalytic activity was measured with synthesizing p - Tert - butylphenol under Friedel - Crafts alkylation conditions as probing reaction. The preparation conditions of SO2-/Fe203 were also examined, that is, the soaked concentration of H2SO4 was 0.5 mol. L-l, the calcining temperature was 550℃, and the calcining time was 4 h. The optimum reaction conditions for synthesizing p - Tert - butylphenol by alkylation of methyl tert - butyl ether （MTBE） with phenol using SO4^2-/Fe2O3 as catalyst were that the molar ratio of phenol to MTBE to was 1 ： 2.0, the mass ratio of the catalyst used in the reactants was 4%, the reaction time was 3 h, and the reaction temperature was 90 ℃. Under these conditions, the yield of alkylation reaction was 80.8 %.

关 键 词：SO42-/Fe2O3 固体超强酸催化剂 烷基化 甲基叔丁基醚 对叔丁基苯酚 

分 类 号：O621.3[理学—有机化学]