二氧化钛负载硅钨酸催化合成2,4-滴丁酯  

Catalytic Synthesis of 2,4-D Butylate with H_4 SiW_(12) O_(40)/TiO_2

作　　者：李芊芊[1] 杨赟[1] 徐潇[1] 盛蕖[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》2011年第1期26-28,共3页Advances in Fine Petrochemicals

基　　金：湖北师范学院大学生科研基金资助项目(2010046)

摘　　要：以二氧化钛负载硅钨酸(H_4SiW_(12)O_(40)/TiO_2)为催化剂,2,4-二氯苯氧乙酸和正丁醇为原料,合成了2,4-滴丁酯。通过正交实验确定了合成反应的适宜条件:固定2,4-二氯苯氧乙酸用量0.04 mol,2,4-二氯苯氧乙酸与正丁醇物质的量比为1:5,催化剂用量0.15 g,带水剂环己烷8 mL,反应时间2 h。在此条件下,2,4-滴丁酯的收率可达80.78%。采用红外光谱对合成产物进行了表征。2,4 -D butylate was synthesized from 2,4 -dichlorophenoxyacetic acid and n -butanol using H4SiW12O40/TiO2 as catalyst. The optimum conditions were obtained by orthogonal experiment as follows： molar ratio of acid to alcohol 1：5, amount of the catalyst 0.15 g （based on 0.04 mol 2,4 - dichlorophenoxyacetic acid）, the volume of cyclohexane as water - carrying agent 8 mL, and reflux reaction time 2 hours. The yield of 2,4 - D butylate can reach 80.78% under above conditions. The product was characterized by IR.

关 键 词：2 4-滴丁酯 硅钨酸 催化 合成 

分 类 号：TQ245.12[化学工程—有机化工]