Lipase-catalyzed acylation of l-carnitine with conjugated linoleic acid in [Bmim]PF6 ionic liquid

文献类型： 外文期刊

第一作者： Tian, Jinqiang

作者： Tian, Jinqiang;Wang, Qiang;Tian, Jinqiang;Wang, Qiang;Zhang, Zhongyuan

作者机构：

关键词： L-carnitine;Conjugated linoleic acid;Acylation;Lipase;[Bmim]PF6;Ionic liquid

期刊名称：EUROPEAN FOOD RESEARCH AND TECHNOLOGY （ 影响因子：2.998； 五年影响因子：3.005 ）

ISSN： 1438-2377

年卷期： 2009 年 229 卷 2 期

页码：

收录情况： SCI

摘要： Improving significantly the acylation reaction of l-carnitine with conjugated linoleic acid catalyzed by lipase needs to select an efficient and suitable reaction medium that is not only polar but also hydrophobic. [Bmim]PF6 which is satisfied with the above two requirements was applied as the reaction medium. The optimal reaction conditions were: Novozyme 435 as the catalyst, 5:1 of molar ratio of fatty acid to l-carnitine, 40 g L-1 lipase, 0.22 a(W) of initial water activity, 125 g L-1 molecular sieves (they were added within 0-3 h of reaction time), 60 A degrees C of reaction temperature, 200 rpm of rotation speed, 32 h of reaction time. The overall conversion could reach 98.27%. The conversion in [Bmim]PF6 was 2.13 and 1.56 times higher than that in acetonitrile and in solvent-free system, respectively. The lipase in the present work could be used eight times. [Bmim]PF6 as the reaction medium was better than acetonitrile and solvent-free system.

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