二氧化硅负载硅钨酸催化合成苹果酯-B  

Catalytic Synthesis of Apple Ester-B with H_4SiW_(12)O_(40)/SiO_2

作　　者：徐明波[1] 肖军[1] 黄永葵[1] 杨水金[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,黄石435002

出　　处：《精细石油化工进展》2012年第3期29-31,共3页Advances in Fine Petrochemicals

基　　金：湖北省教育厅中青年科研基金资助项目(Q20112507)

摘　　要：采用溶胶-凝胶法制备了二氧化硅负载硅钨酸催化剂(H4SiW12O40/SiO2),并以其为催化剂,以乙酰乙酸乙酯和1,2-丙二醇为原料合成苹果酯-B。通过正交试验确定了最佳反应条件。结果表明,H4SiW12O40/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∶1.4,催化剂用量为反应物料总质量的1.0%,带水剂环己烷为10 mL,反应时间75 min的最佳条件下,苹果酯-B的收率可达81.88%。A new environmental friendly catalyst H2SiW12O40/SiO2 was prepared by the method of sol - gel method. Apple ester - B was synthesized from ethyl acetoacetate and 1,2 - propanediol in the presence of H2SiW12O40/SiO2. The optimum conditions were obtained by orthogonal experiment as follows： molar ratio of ethyl acetoacetate to 1,2 - propanediol 1 ： 1.4, the dosage of the catalyst based on the total mass of reactants 1.0%, the volume of cyclohexane as water - carrying agent 10 mL, and the reaction time 75 minutes. The yield of apple ester - B could reach 81.88% under the above conditions. H2SiW12O40/SiO2 is good catalyst for synthesizing apple ester - B.

关 键 词：苹果酯-B 硅钨酸 催化 

分 类 号：TQ655[化学工程—精细化工]