纳米固载杂多酸催化合成癸酸异戊酯_王敏.pdf

文档介绍：第 35 卷第 1 期 ,
2012 年 1 月 HEBEI HUAGONG Jan. 2 0 1 2
基本有机化工
纳米固载杂多酸催化合成癸酸异戊酯
王敏 1, 张富捐 2
(,河南郑州 450052;,河南许昌 461000)
摘要:采用溶胶-凝胶法制备纳米固载杂多酸催化剂H4SiW12O40/SiO2。以癸酸和异戊醇为原料,催化合成癸酸异戊
酯。考察了影响酯化率的各种因素,确定了适宜的工艺条件:酸醇物质的量比为1∶,催化剂用量为反应物料总质
量的3%,环己烷用量为8 mL,反应时间为60 min,%。
关键词:纳米固载杂多酸;溶胶-凝胶法;癸酸异戊酯;催化合成
中图分类号:O ; O +.1 文献标识码:A 文章编号:1003-5095(2012)01-0036-03
Catalytic Synthesis of Capric acid isoamyl ester
by plex Heteropoly acid
WANG Min1 , ZHANG Fu-juan2
( of Chemistry,Zhengzhou University,Zhengzhou 450052,China; of Chemistry,Xuchang
University,Xuchang 461000,China)
Abstract:plex heteropoly acid (H4SiW12O40/SiO2) was prepared by the sol-gel synthesis
of capric acid isoamyl ester from capric acid and isoamyl the influence esterification rate factor,the opti-
mum conditions was that molar ratio of capric acid to isoamyl alcohol was 1∶,the mass fraction of catalyst in the reac-
tion medium was 3%,cyclohexane amount was 8 mL,and the reaction time was 60 min,the esterification rate was %.
Key words:plex heteropoly acid;sol-gel method;capric acid isoamyl ester; catalytic synthesis
癸酸异戊酯是无色透明液体,具有浓郁的玫瑰快速、高效的非均相催化剂特性,这已成为当前杂
香味,难溶于水,可用来配制各种食用香精、化妆香多酸催化研究的热点[2,3]。
精等[1]。目前,合成癸酸酯常采用浓硫酸催化酯化, 考虑到纳米催化剂的优异性能和杂多酸对
但此法副反应多,产物后处理困难,腐蚀设备、污染环境友好的特