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| 大豆油脂肪酸乙酯的合成与精制工艺研究 |
| Synthesis and purification of soybean oil fatty acid ethyl ester |
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| DOI： |
| 中文关键词: 大豆油脂肪酸乙酯 合成 精制 低共熔溶剂 |
| 英文关键词:soybean oil fatty acid ethyl ester synthesis purification deep eutectic solvent |
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| 中文摘要: |
| 以甲醇钠催化乙醇和大豆油发生酯交换反应合成大豆油脂肪酸乙酯，并采用氯化胆碱和尿素制备的低共熔溶剂（DES）对产品进行精制。通过正交实验得到酯交换反应的优化工艺条件为：催化剂用量1.3%，醇油摩尔比8∶1，反应温度65℃，反应时间3 h。在此条件下，大豆油转化率达到99.38%。通过正交实验得到DES精制大豆油脂肪酸乙酯的最优工艺条件为：DES用量（以与大豆油脂肪酸乙酯体积比表示）1∶1，洗涤温度75℃，洗涤时间4 min。在此条件下，大豆油脂肪酸乙酯产品中甘油残留量为0.017%，pH为7.0,且无废水排放。 |
| 英文摘要: |
| With sodium methoxide as catalyst, soybean oil fatty acid ethyl ester was synthesized by transesterification of ethanol and soybean oil，then the soybean oil fatty acid ethyl ester was purified by deep eutectic solvent (DES) prepared by choline chloride and urea. The results showed that the optimal synthesis conditions were obtained by orthogonal experiment as follows: catalyst dosage 1.3%, molar ratio of ethanol to oil 8∶1, reaction temperature 65℃ and reaction time 3 h. Under these conditions，the conversion rate of soybean oil reached 99.38%. The purification conditions of soybean oil fatty acid ethyl ester by DES were optimized by orthogonal experiment as follows: volume ratio of DES to soybean oil fatty acid ethyl ester 1∶]1, washing temperature 75℃ and washing time 4 min. Under these conditions, the residue content of glycerol in the purified product was 0.017%,and the pH of the purified product was 7.0,meanwhile, there was no wastewater emission in the purification process. |
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