杂多酸盐TiSiW_(12)O_(40)-Al_4(SiW_(12)O_(40))_3/TiO_2-Al_2O_3催化合成壬酸乙二醇单酯  

Catalytic Synthesis of Ethylene Glycol Monopelargonate by Heterogeneous Supported Heteropoly Acid TiSiW_(12)O_(40)-Al_4(SiW_(12)O_(40))_3/TiO_2-Al_2O_3

作　　者：孔祥文[1] 刘晓普[1] 李召静[1] 于龙[1] 

机构地区：[1]沈阳化工大学应用化学学院,辽宁沈阳110142

出　　处：《实验室研究与探索》2012年第12期24-26,38,共4页Research and Exploration In Laboratory

基　　金：辽宁省教育科学"十一五"规划立项课题(JG09DB112);辽宁省教育厅高等学校科学研究项目(202092009)

摘　　要：以杂多酸盐TiSiW12O40-Al4(SiW12O40)3/TiO2-Al2O3为催化剂,壬酸和乙二醇为原料催化酯化合成壬酸乙二醇单酯。考察了酸醇的物质的量比、催化剂用量、反应时间、反应温度等对壬酸酯化率的影响。结果表明,合成壬酸乙二醇单酯的优化条件为:n(壬酸)∶n(乙二醇)=1∶3,催化剂的用量为反应物总质量的4%,反应时间3.5 h,反应温度90℃,在此条件下,酯化率可达94.6%以上。通过红外光谱验证了目标产物,发现该杂多酸盐催化剂对合成壬酸乙二醇单酯具有较高的催化活性,合成工艺简单,催化剂容易回收并可多次重复使用等特点。The synthesis of ethylene glycol monopelargonate with pelargonic acid and ethylene glycol as reactants and using TiSiW12O40-Al4（SiW12O40）3/TiO2-Al2O3 as a catalyst was studied.The factors influencing its catalytic performance were investigated and optimized,including molar ratios of pelargonic acid to ethylene glycol,the amount of catalyst,reaction time,and reaction temperature.The optimum reaction conditions were as follows： The molar ratio of pelargonic acid to ethylene glycol was 1：3.The mass ratio of catalyst to reactants was 4%.The reaction time was 3.5 h.The reaction temperature was 90 ℃.Moreover,the rate of esterification was up to 94.6%.The structure of ethylene glycol monopelargonate was characterized by IR spectrum.The catalyst was prepared easily and had high catalytic activity and could be recycled and used for many times.

关 键 词：杂多酸盐 壬酸 乙二醇 壬酸乙二醇单酯 酯化反应 催化 

分 类 号：TS727[轻工技术与工程—制浆造纸工程] TS03