二氧化硅负载磷钨钼酸催化合成苹果酯-B  

Catalytic synthesis of fructon-B by H_3PW_6Mo_6O_(40)/SiO_2

作　　者：黄永葵[1] 邓丽分 杨水金[1] 

机构地区：[1]湖北师范学院化学与环境工程学院污染物分析与资源化技术湖北省重点实验,湖北黄石435002

出　　处：《湖北师范学院学报（自然科学版）》2011年第4期81-85,共5页Journal of Hubei Normal University(Natural Science)

基　　金：湖北省自然科学基金(ZRY0150);污染物分析与资源化技术湖北省重点实验室基金资助(KY2010G13)

摘　　要：采用溶胶-凝胶法制备了多相催化剂H3PW6Mo6O40/SiO2,并通过FT-IR、XRD对其进行了表征。探讨了该催化剂对合成苹果酯-B的催化活性,较系统地研究了酯醇物质的量比、催化剂用量、带水剂用量、反应时间等因素对产品收率的影响。研究发现:H3PW6Mo6O40/SiO2是合成苹果酯-B的良好催化剂,在n(乙酰乙酸乙酯)∶n(1,2-丙二醇)=1∶1.3,催化剂用量为反应物总质量的1.0%,带水剂环己烷用量为12 mL,反应时间45 min的适宜条件下,苹果酯-B的收率为71.4%.H3PW3Mo6O40/SiO2 was prepared by the sol- gel method, and characterized by FT- IR and XRD. Catalytic activity of H3PW3Mo6O40/SiO2 was evaluated in the synthesis of Fructon- B. The different reaction parameters were discussed and the best reaction conditions were found out. Experimental results showed that H3PW3Mo6O40/SiO2 is an excellent catalyst. The optimum conditions are ： molar ratio of ethyl acetoacetate to 1,2 - propylene glycol is 1 ： 1.3, the dosage of catalyst is 1.0% based on feed stocks, cyclohexane as carrying - water reagent, and the reaction time is 45 min, the yield of Fructon - B can reach 71.4%.

关 键 词：H3PW3Mo6O40 SIO2 催化 苹果酯-B 

分 类 号：TQ426.91[化学工程] TQ655