食品科学

• 工艺技术 •    下一篇

微波协同固体酸合成肉桂酸异丙酯

曹崇江,鞠兴荣,刘晓庚   

  1. 南京财经大学食品科学与工程学院,江苏 南京 210046
  • 出版日期:2013-12-25 发布日期:2014-01-03

Microwave Assisted Synthesis of Isopropyl Cinnamate Using Solid Super Acid Catalyst

CAO Chong-jiang,JU Xing-rong,LIU Xiao-geng   

  1. School of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210046, China
  • Online:2013-12-25 Published:2014-01-03

摘要:

目的:研究肉桂酸异丙酯高效绿色合成工艺。方法:以肉桂酸和异丙醇为原料,研究微波辐射Ga2O3/SO42-/ZrO2固体酸催化合成肉桂酸异丙酯的合成方法,采用正交试验与单因素试验相结合的方法考察微波功率、醇酸物质的量比、反应时间、催化剂用量对肉桂酸异丙酯收率的影响。结果:Ga2O3/SO42-/ZrO2在微波条件下具有优异催化活性与稳定性,最佳工艺条件为微波功率400W、醇酸物质的量比6:1、催化剂用量0.6g(0.01mol肉桂酸)、反应时间20min,此条件下肉桂酸异丙酯收率达到96.1%。结论:微波协同固体超强酸合成肉桂酸异丙酯避免了传统工艺的设备腐蚀与环境污染,是一种高效绿色的合成工艺。

关键词: 微波合成, 固体酸, 酯化, 肉桂酸异丙酯

Abstract:

This study was focus on exploring a novel technology for green efficient synthesis of isopropyl cinnamate. The
microwave-assisted synthesis was used in the preparation of isopropyl cinnamate from cinnamic acid and isopropyl alcohol.
The synthesis of isopropyl cinnamate by esterification was catalyzed by solid acid Ga2O3/SO42-/ZrO2. The effects of microwave
power, molar ratio of methanol to acid, reaction time and catalyst dosage were analyzed by single-factor and orthogonal array
design methods The results showed that the catalyst had excellent catalytic activity and stability during microwave irradiation.
The optimum esterification conditions were as follows: 0.6 g of the catalyst (0.01 mol cinnamic acid) and a molar ratio between
methanol and acid of 6:1 as well as 400 W microwave irradiation for 20 min. Under these conditions, the highest yield of isopropyl
cinnamate, 96.1%, was obtained. Therefore, microwave-assisted synthesis of isopropyl cinnamate by means of Ga2O3/SO42-/ZrO2
catalysis is a highly efficient and environment friendly procedure without mechanical erosion or environment pollution.

Key words: microwave-assisted synthesis, solid acid, esterification, isopropyl cinnamate