作者:Xianbing Ji、Yinxia Chen、Zuoyuan Shen
DOI:10.14233/ajchem.2014.18202
日期:——
Nano-SO42–/TiO2 was prepared by wet impregnation method. The structure and properties of the prepared nano-SO42–/TiO2 catalyst was characterized by XRD, SEM, TEM and BET analysis. The catalytic activities of the catalysts were tested by the esterification of sebacic acid with 2-ethyl hexanol and a series of other dicarboxylic acid. The influence factors on the reaction, such as the catalyst calcination temperature, reaction temperature/time and the molar ratio of acid to alcohol were extensively explored. Nano-SO42–/TiO2 prepared exhibited much higher catalytic activity in esterification reactions. By applying the optimized reaction condition, i.e. 160 ºC, 2 h, 5 wt % nano-SO42–/TiO2 with a 1:3 molar ratio of sebacic acid to 2-ethyl hexanol, higher than 99 % isolated of the desired ester could be obtained.
纳米SO42-/TiO2是通过湿法浸渍法制备的。使用XRD、SEM、TEM和BET分析对所制备的纳米SO42-/TiO2催化剂的结构和性质进行了表征。催化剂的催化活性通过癸二酸与2-乙基己醇以及一系列其他二羧酸的酯化反应进行了测试。反应的影响因素,如催化剂煅烧温度、反应温度/时间以及酸与醇的摩尔比,进行了广泛的探讨。所制备的纳米SO42-/TiO2在酯化反应中展现出更高的催化活性。在优化的反应条件下,即160°C、2小时、5 wt%的纳米SO42-/TiO2及癸二酸与2-乙基己醇的1:3摩尔比,可以获得超过99%的目标酯的分离率。