摘要
以酸化膨润土(SO42-/Bentonite)固体酸为催化剂,草酸和正丁醇为原料,合成草酸二丁酯。考察焙烧温度对催化剂活性的影响。结果表明,焙烧温度500℃时催化剂活性较好。考察反应温度、原料配比、催化剂用量和反应时间等因素对酯化反应的影响,通过正交实验得到最佳酯化反应工艺条件:n(正丁醇)∶n(草酸)=3.5∶1,w(SO42-/Bentonite)=1.5%,反应温度130℃,反应时间3 h。最佳酯化反应条件下,草酸的转化率达到95.8%。催化剂重复使用6次后,草酸转化率达到93.6%。
Synthesis of dibutyl oxalate from oxalic acid and n-butyl alcohol over bentonite activated by acid （SO4^2-/Bentonite） was studied. Preparation condition for the catalyst, such as calcination temperature,had apparently influence on catalytic behaviors of SO4^2-/Bentonite, with optimum calcination temperature of 500 ℃. Effects of reaction condition, i. e. , reaction temperature, n-butyl-alcohol-tooxalic-acid mole ratio, catalyst dosage and reaction time, was investigated. Optimum reaction condition was obtained by orthogonal experiment as follows： n（ n-butyl alcohol） ： n（oxalic acid） = 3.5： 1, catalyst dosage = 1.5% of the total mass of oxalic acid and n-butyl alcohol, reaction temperature 130 ℃, reaction time 3 h. Oxalic acid conversion of 95.8% was obtained. Activity of the catalyst kept at 93.6% after 6 cycles of use.
出处
《工业催化》
CAS
2008年第7期61-65,共5页
Industrial Catalysis
基金
中国石油吉林石化资助项目(G-00-学-05)
关键词
精细化学工程
膨润土
酸活化
酯化催化剂
草酸二丁酯
fine chemical engineering
bentonite
acid activation
esterification catalyst
dibutyl oxalate
作者简介
李春华，1981年生，女，吉林省榆树市人，助理工程师，从事环境保护研究与开发。
通讯联系人：丁斌。
