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在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究

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高延红, 柴金岭, 李干佐, 张高勇. 在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究[J]. 环境化学, 2005, 24(5): 538-541.
引用本文: 高延红, 柴金岭, 李干佐, 张高勇. 在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究[J]. 环境化学, 2005, 24(5): 538-541.
shu
GAO Yan-hong, CHAI Jin-ling, LI Gan-zuo, ZHANG Gao-yong. KINETICS OF ESTERIFICATION REACTION CATALYZED BY LIPASE NOVOZYM 435 IN W/O MICROEMULSION OF ALKYL POLYGLUCOSIDE[J]. Environmental Chemistry, 2005, 24(5): 538-541.
Citation: GAO Yan-hong, CHAI Jin-ling, LI Gan-zuo, ZHANG Gao-yong. KINETICS OF ESTERIFICATION REACTION CATALYZED BY LIPASE NOVOZYM 435 IN W/O MICROEMULSION OF ALKYL POLYGLUCOSIDE[J]. Environmental Chemistry, 2005, 24(5): 538-541.
shu

在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究

  • 1.

    山东师范大学化学系, 济南, 250014;

  • 2.

    山东大学胶体与界面化学教育部重点实验室, 济南, 250100

  • 基金项目:

    山东省自然科学基金资助项目(Y2003B01)

KINETICS OF ESTERIFICATION REACTION CATALYZED BY LIPASE NOVOZYM 435 IN W/O MICROEMULSION OF ALKYL POLYGLUCOSIDE

  • 1.

    Department of Chemistry, Shandong Normal University, Jinan, 250014;

  • 2.

    Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, Jinan, 250100

  • Fund Project:

  • 摘要: 研究了Novozym 435脂肪酶在烷基聚葡糖苷形成的W/O微乳液体系中,催化正丁醇与正己酸合成酯的反应动力学.反应初始速率V0与正丁醇(ROH)和正己酸(HA)摩尔浓度的比值(CROH0/CHA0)有关,在CROH0/CHA0=0.2—17范围内,随CROH0/CHA0比值减小,初始速率V0增大,尤其是当CROH0/CHA03时,V0迅速增大.其原因可能是醇浓度较高时,醇与酶结合形成的死端复合物在较高浓度酸的作用下分解,重新析出游离态酶所致.脂肪酶加入量、水相介质组成和醇的种类等对反应速率有重要影响.
    Abstract: The esterification reaction kinetics of hexanoic acid with butanol, catalyze d by Novozym 435 lipase, was studied in water-in-oil microemulsions formed by alkyl polyglucoside C10G1.54 /n-butanol/cyclohexane/water buffer solution. The initial rate V0 was influenced by the ratio of m olar concentration for butanol to hexanoic acid CROH0/CHA0(at a range of 0.2—17).As CROH0/CHA0decreases,especially when CROH0/CHA03, the V0 increases rapidly. The reason is that the dead-end complex formed by butanol and lipase, when an excess of butanol exists in this system, may decompose under a higher concentration of hexanoic acid to release lipase aga in. The effects of the lipase concentration, aqueous composition and alcohols on the initial rate were also discussed.
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  • 收稿日期:  2004-12-26
高延红, 柴金岭, 李干佐, 张高勇. 在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究[J]. 环境化学, 2005, 24(5): 538-541.
引用本文: 高延红, 柴金岭, 李干佐, 张高勇. 在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究[J]. 环境化学, 2005, 24(5): 538-541.
shu
GAO Yan-hong, CHAI Jin-ling, LI Gan-zuo, ZHANG Gao-yong. KINETICS OF ESTERIFICATION REACTION CATALYZED BY LIPASE NOVOZYM 435 IN W/O MICROEMULSION OF ALKYL POLYGLUCOSIDE[J]. Environmental Chemistry, 2005, 24(5): 538-541.
Citation: GAO Yan-hong, CHAI Jin-ling, LI Gan-zuo, ZHANG Gao-yong. KINETICS OF ESTERIFICATION REACTION CATALYZED BY LIPASE NOVOZYM 435 IN W/O MICROEMULSION OF ALKYL POLYGLUCOSIDE[J]. Environmental Chemistry, 2005, 24(5): 538-541.
shu

在烷基聚葡糖苷W/O微乳液中Novozym 435脂肪酶催化酯合成反应动力学的研究

  • 1.  山东师范大学化学系, 济南, 250014;
  • 2.  山东大学胶体与界面化学教育部重点实验室, 济南, 250100
  • 收稿日期:  2004-12-26
基金项目:

山东省自然科学基金资助项目(Y2003B01)

摘要: 研究了Novozym 435脂肪酶在烷基聚葡糖苷形成的W/O微乳液体系中,催化正丁醇与正己酸合成酯的反应动力学.反应初始速率V0与正丁醇(ROH)和正己酸(HA)摩尔浓度的比值(CROH0/CHA0)有关,在CROH0/CHA0=0.2—17范围内,随CROH0/CHA0比值减小,初始速率V0增大,尤其是当CROH0/CHA03时,V0迅速增大.其原因可能是醇浓度较高时,醇与酶结合形成的死端复合物在较高浓度酸的作用下分解,重新析出游离态酶所致.脂肪酶加入量、水相介质组成和醇的种类等对反应速率有重要影响.

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