| 固定化酶催化桐油酯交换反应的研究 |
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| 引用本文： | 徐桂转,张百良,刘会丽.固定化酶催化桐油酯交换反应的研究[J].中国农业科学,2006,39(10):2089-2094. |
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| 作者姓名： | 徐桂转 张百良 刘会丽 |
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| 作者单位： | 河南农业大学 |
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| 基金项目： | 河南省高校杰出科研创新人才工程项目 |
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| 摘 要： | 桐油与甲醇酯交换反应的产物主要为桐酸甲酯，该产物不仅可作为可再生的替代能源－生物柴油，同时是一种重要的化工原料。本文以桐籽油为原料，研究固定化脂肪酶催化桐油与甲醇酯交换反应的工艺条件，利用Novo435脂肪酶，在无有机溶剂存在的情况下，利用响应面研究方法，对桐油酯交换反应的工艺条件进行了研究和优化。得到了桐油酯交换反应的最佳工艺条件：醇油比2.2：1、温度43℃、脂肪酶用量14％（与油脂的质量比）、搅拌转速200rpm，反应18h后，桐油的酯交换率达到了67.5％(理论为73.3％)。脂肪酶经有机溶剂洗涤后连续使用120h，桐油酯交换率减小了6％。理论上甲醇与油脂的摩尔比为3：1，甲醇不能一次加入，分两批加入，共反应36h后，桐油的酯交换率达到85%。
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| 关 键 词： | 无溶剂 酯交换 生物柴油 脂肪酶 桐油 |
| 收稿时间： | 2005-11-17 |
| 修稿时间： | 2005-11-172006-03-31 |
A Study on Immobilized Lipase Catalyzed Transesterification Reaction of Tung Oil |
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| XU Gui-zhuan,ZHANG Bai-liang,LIU Hui-li.A Study on Immobilized Lipase Catalyzed Transesterification Reaction of Tung Oil[J].Scientia Agricultura Sinica,2006,39(10):2089-2094. |
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| Authors: | XU Gui-zhuan ZHANG Bai-liang LIU Hui-li |
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| Institution: | Key Laboratory of Renewable Energy of Ministry of Agriculture, Mechanical and Electrical Engineering College of Henan Agricultural University, Zhengzhou 450002 |
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| Abstract: | The products of transesterification reaction of tung oil are mainly eleostearic acid methyl esters which not only can be used as a kind of renewable energy-biodiesel, but also an important chemical material. Immobilized enzyme was used to catalyze the transesterification reaction of Tung seed oil and methanol in this article. NOVO435 lipase was catalyst, and the response Surface methodology was used to optimize the transesterification reaction conversion of tung oil in non-solvent systems. The optimized reaction condition was found: rotation rate is 200rpm、the molar ratio of methanol and oil is 2.2:1、reaction temperature is 43℃、the mass ratio of catalyst and oil is 14% (based on the weight of oil), and after reacting for 18h, about 67.5% of the oil conversed to its corresponding methyl esters (the academic conversion is 73.3%). The esters conversion of tung oil was decreased by 6% after the lipase being used for 120h, and the lipase was washed by organic solvents after each reaction. Theoretically the molar ratio of methanol and the oil is 3:1, but methanol cannot be inserted in one time, and if the methanol was inserted by two steps, and about 85% conversion was gotten after 36h of reaction |
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| Keywords: | Non-solvent Transesterification Biodiesel Lipase Tung oil |
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