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首页> 外文期刊>Quimica nova >Potential alternative for using the glycerol generated in the biodiesel production: enzymatic synthesis of monolaurin by esterification
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Potential alternative for using the glycerol generated in the biodiesel production: enzymatic synthesis of monolaurin by esterification

机译：使用生物柴油生产中产生的甘油的潜在替代品：通过酯化酶法合成单月桂酸酯

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摘要

Esterification reactions of glycerol with lauric acid in solvent free system were carried out using lipases from several sources. All lipases were immobilized on polysiloxane-polyvinyl alcohol particles by covalent binding with high activity recovered. Among the tested enzymes, the Candida antarctica lipase allowed to attain the highest molar conversion (76%), giving similar proportions of monolaurin, dilaurin and low amount of trilaurin. To further improve the process, the Response Surface Methodology (RSM) was used and optima temperature and molar ratio glycerol to lauric acid were found to be 45 ?oC and 5:1, respectively. Under these conditions, 31.35% of monolaurin concentrations were attained and this result was in close agreement with the statistical model prediction.
机译：在无溶剂体系中，甘油与月桂酸的酯化反应使用多种来源的脂肪酶进行。通过共价结合将所有脂肪酶固定在聚硅氧烷-聚乙烯醇颗粒上，并回收了高活性。在测试的酶中，南极假丝酵母脂肪酶的摩尔转化率最高（76％），单月桂酸酯，二月桂酸酯和三月桂酸酯的含量相似。为了进一步改进该过程，使用了响应表面方法（RSM），发现甘油和月桂酸的最佳温度和摩尔比分别为45°C和5：1。在这些条件下，单月桂酸酯浓度达到31.35％，这一结果与统计模型的预测非常吻合。

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