用负载磷钨酸的SBA-15分子筛催化合成氯乙酸酯  

Catalytic Synthesis of Chloroacetates with H_3PW_(12)O_(40) Supported by SBA-15

作　　者：许芸[1] 薛建伟[1] 王少鹏[1] 吕志平[1] 李福祥[1] 吴岚[1] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024

出　　处：《太原理工大学学报》2006年第3期342-345,共4页Journal of Taiyuan University of Technology

基　　金：山西省科技攻关资助项目(031098)

摘　　要：制备了负载磷钨酸的介孔分子筛SBA-15复合物PW12／SBA—15，用X射线衍射、N2吸附-程序升温脱附、红外光谱等方法进行了表征，用正丁醇、异丁醇、正戊醇、异戊醇等和氯乙酸为原料在PW12／SBA-15催化反应下合成了氯乙酸系列酯，并考查了醇酸比、催化剂用量、磷钨酸负载量、反应时间和催化剂寿命等因素对酯化率的影响。实验结果表明：SBA-15负载磷钨酸催化剂活性好，且催化活性稳定，催化剂可重复使用30次以上。适宜的反应条件为：醇与氯乙酸的摩尔比1．3：1，催化剂的用量为反应物料总质量的2．0％，磷钨酸负载量23％（质量分数），反应时间3～5h。酯化率最高可达98％以上。The SBA-15 molecular sieve supporting H3PW12040 （PW/SBA-15） catalysts were prepared and characterized, which were used for catalyst to synthesize a series of chloroacetates from n-butyl alcohol, iso-hutyl alcohol,n-amyl alcohol, iso-amyl alcohol and so on with chloroacetic acid. The experimental results indicated that the catalytic activity of molecular sieve SBA- 15 supporting heteropoly acid is good, and it is still stable while the catalyst was the optimum reaction conditions were as follows, mole ratio of alcohol to acid 1 of the catalyst used in the reactants 2.0%,reaction time 3～5 h, most esterifi 98%.

关 键 词：SBA-15 磷钨酸 氯乙酸酯 酯化 

分 类 号：O643.1[理学—物理化学] TQ225.24[理学—化学]