磺化的聚(4-乙烯基吡啶)杂多化合物催化剂的制备及其酯化反应性能研究  

Preparation of sulfonated poly (4-vinylpyridine) heteropolyacid salt catalyst for esterification reaction

作　　者：李冬冬[1] 郜蕾[2] 丁明珠[1] 廉红蕾[1] 

机构地区：[1]郑州大学化工与能源学院多相催化与工程科学中心,河南郑州450001 [2]郑州大学国际学院,河南郑州450001

出　　处：《现代化工》2016年第11期125-128,130,共5页Modern Chemical Industry

摘　　要：合成了聚(4-乙烯基吡啶)杂多化合物催化剂,并作为多相催化剂用于己二酸与正丁醇的酯化反应。采用TG、ICP、XRD和FT-IR等分析测试技术对催化剂组成和结构进行表征,结果表明,该催化剂具有高的热稳定性,杂多阴离子高度分散在聚合物表面。当反应温度为115℃,催化剂质量分数为2%,酸醇摩尔比为1∶3.3,带水剂甲苯质量分数为21%时,己二酸的转化率最高,可达95%,催化剂重复使用5次没有明显的活性降低,并且在使用过程中,催化剂结构保持不变。Sulfonated poly （4-vinylpyridine） heteropolyacid salt is synthesized as a heterogeneous catalyst to effectively catalyze the esterification of adipie acid with n-butanol, which is then characterized by TG, ICP, XRD and FTIR. The result indicates that the catalyst has high thermal stability and heteropoly anion is highly dispersed on polymer surface. The high conversion （95%） for esterification has been obtained under the following conditions：388K of reaction temperature,3. 3：1.0 molar ratio of n-butanol to adipie acid,2% mass ratio of catalyst to adipic acid and 21% mass ratio of toluene to reactants. The catalyst could be easily recovered by the filtration and reused for five times without significant loss of catalytic activity. During the reaction time, the catalyst maintains its structural integritv.

关 键 词：聚(4-乙烯基吡啶)杂多化合物 酯化反应 多相催化剂 

分 类 号：O621.256.4[理学—有机化学] TQ225.24[理学—化学]