食品科学 ›› 2009, Vol. 30 ›› Issue (6): 123-127.doi: 10.7506/spkx1002-6630-200906025

• 工艺技术 • 上一篇    下一篇

有机介质中酶催化合成己酸乙酯的研究

曾家豫1,2,周兴辉1,张 继1,2,唐 功1,高亚娟1   

  1. 1.西北师范大学生命科学学院 2.甘肃省高分子材料重点实验室
  • 收稿日期:2008-06-02 修回日期:2008-08-28 出版日期:2009-03-15 发布日期:2010-12-29
  • 通讯作者: 曾家豫 E-mail:zengjy@nwnu.edu.cn
  • 基金资助:

    甘肃省教育厅科研项目(0601-28;0501B-16)

Study on Enzymatic Synthesis of Ethyl Caproate in Organic Medium

ZENG Jia-yu1,2,ZHOU Xing-hui1,ZHANG Ji1,2,TANG Gong1,GAO Ya-juan1   

  1. (1. College of Life Science, Northwest Normal University, Lanzhou 730070, China;
    2. Key Laboratory of Polymer Materials of Gansu Province, Lanzhou 730070, China)
  • Received:2008-06-02 Revised:2008-08-28 Online:2009-03-15 Published:2010-12-29
  • Contact: ZENG Jia-yu1,2 E-mail:zengjy@nwnu.edu.cn

摘要:

本实验研究了有机介质中CRL 脂肪酶催化己酸与无水乙醇合成己酸乙酯的酯化反应条件,并利用红外光谱、GC-MS、气相色谱等现代方法对合成的产物进行了表征。结果显示,合成的产物为己酸乙酯,其纯度为96.91%,分子量144。酯化反应在以正庚烷为反应介质,反应温度为311K,己酸与无水乙醇的摩尔比为1:1.3,己酸浓度为0.2mol/L 的条件下,反应24h 后,转化率达到94.6%。

关键词: 脂肪酶, 己酸乙酯, 有机介质, 酯化反应

Abstract:

The synthesis of ethyl caproate catalyzed by candida rugosa lipase (CRL) in organic solvents was investigated, and the effects of reaction time, organic solvent, substrate concentration, and the molar ratio of acid to alcohol on ethyl caproate synthesis were examined systematically. Moreover, the structure, purity and molecular weight of the synthesized product were also characterized by IR, GC and GC-MS. The experimental results showed that the synthesized product is ethyl caproate, its molecular weight is 144, and its purity reaches 96.91%. When the esterification is carried out with the molar ratio of acid to ethanol of 1:1.3 at 38 ℃ for 24 h by using n-heptane as reaction medium, the yield of the esterification reaches 94.6%.

Key words: lipase, ethyl caproate, organic medium, esterification

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