SO_4^(2-)/ZrO_2/MCM-41催化合成柠檬酸三丁酯的研究  

Synthesis of tributyl citrate over SO_4^(2-)/ZrO_2/MCM-41

作　　者：王富丽[1] 黄世勇[1] 连丕勇[2] 

机构地区：[1]广西科学院,广西南宁530007 [2]辽宁石油化工大学材料化学系,辽宁抚顺113001

出　　处：《工业催化》2009年第5期56-60,共5页Industrial Catalysis

基　　金：广西科学院创新基金资助项目(08YJ16XW01)

摘　　要：水热合成了介孔材料MCM-41,并以其为载体负载固体超强酸SO_4^(2-)/ZrO_2,通过XRD和N_2吸附/脱附对制备的SO_4^(2-)/ZrO_2/MCM-41催化剂进行表征,认为MCM-41负载SO_4^(2-)/ZrO_2后,仍为长程有序的六方孔道结构。在固定床反应器中,以柠檬酸和正丁醇为原料,研究该催化剂合成柠檬酸三丁酯的活性。对反应条件进行了考察,得出最佳反应条件:温度140℃,空速1.0 h^(-1),醇酸物质的量比为4.5。在此条件下,柠檬酸的酯化率最高可达94.5%。48 h的寿命实验结果表明,该催化剂具有较好的稳定性。Mesoporous MCM-41 was synthesized via hydrothermal method and used as the carrier for SO4^2-/ZrO2 solid superacid. The SO4^2-/ZrO2/MCM-41 catalysts were characterized by XRD and N2 adsorption/desorption. The characterization results showed that the well-ordered hexagonal array of mesopores in these samples were still sustained. The catalytic activity of SO4^2-/ZrO2/MCM-41 for synthesis of tributyl citrate from n-butyl alcohol and citric acid was investigated in a fixed-bed reaction system. The optimal reaction condition was obtained as follows ： reaction temperature 140 ℃, LHSV 1.0 h^-1, n （ n-butyl alcohol） ： n （ citric acid） = 4.5. Citric acid conversion of 94.5% was obtained under the condition. A 48-hour life test showed that the catalyst had good stability.

关 键 词：有机合成化学 SO_4~2-/ZrO_2/MCM-41 固体超强酸 柠檬酸三丁酯 柠檬酸 正丁醇 

分 类 号：O643.36[理学—物理化学] O623.624[理学—化学]