摘要
以氨基磺酸为催化剂,环己烷为带水剂,对草酸与正丁醇之间的酯化反应进行了研究,考察了醇酸物质的量比、催化剂用量、带水剂加入量、反应时间对草酸二丁酯收率的影响。结果表明,氨基磺酸有着良好的催化活性,在草酸用量0.1 mol,n(正丁醇)∶n(草酸)=3.0∶1,催化剂用量为反应物总质量的1.0%,环己烷用量16 mL,回流反应30 m in条件下,草酸二丁酯收率可达85.1%,催化剂重复使用5次仍保持较高活性。
The esterification of oxalic acid with butyl alcohol was studied with aminosulfonic acid as catalyst and cyelohexane as water carrying agents. The effects of different factors such as mole ratio of reactants,catalyst dosage, amount of carrying agent and reaction time on the yield of dibutyl oxalate were investigated. The experimental results showed that aminosulfonic aeid exhibited exeeUently catalytic activity. The optimum reaction conditions were found as follows ：0.1 mol oxalic acid, mole ratio of butyl alcohol to oxalic acid 3. 0： 1,1.0% catalyst based on the total mass of the reactants, 16 mL cyelohexane, and refluxing reaction time 30 min. Under these conditions, the yield of dibutyl oxalate was up to 85.1%. The catalyst could be repeatedly used for five times without lossing its catalytic activity.
出处
《应用化工》
CAS
CSCD
2009年第6期792-794,共3页
Applied Chemical Industry
基金
湖南省教育厅优秀青年科研基金项目(06B089)
关键词
草酸二丁酯
氨基磺酸
催化酯化
dibutyl oxalate
aminosulfonic acid
catalytic esterification
