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| 玉米淀粉残渣中油脂的亚临界流体提取与制备生物柴油的研究 |
| Subcritical fluid extraction of oil in corn starch residue and preparation of biodiesel |
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| DOI： |
| 中文关键词: 玉米淀粉残渣油脂 亚临界流体提取 预酯化 生物柴油 |
| 英文关键词:oil in corn starch residue subcritical fluid extraction pre-esterification biodiesel |
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| 中文摘要: |
| 研究通过亚临界流体提取技术提取玉米淀粉残渣中的油脂，再将提取出的油脂经过预酯化过程、醇解过程，制备生物柴油。结果表明,在玉米淀粉残渣油脂的亚临界流体提取过程中，适宜条件为提取温度40℃、每次提取时间40 min、料液比1∶2、提取次数3次，在该条件下油脂得率为 46.68%；预酯化过程的适宜条件：在真空条件下，反应温度190℃，甘油添加量为理论添加量的175%，催化剂用量为油脂质量的2％，反应时间3 h；经预酯化处理后进一步醇解得到生物柴油，醇解反应的脂肪酸甲酯产率为95.21%。 |
| 英文摘要: |
| The oil in corn starch residue was extracted by subcritical fluid. With the oil as raw material, the biodiesel was prepared by pre-esterification and alcoholysis reaction. The results showed that the optimal conditions of subcritical fluid extraction of oil in corn starch residue were obtained as follows: extraction temperature 40℃, each extraction time 40 min, ratio of material to liquid 1∶2 and extraction three times. Under these conditions, the oil yield was 46.68%. The optimal conditions of pre-esterification were obtained as follows: in vacuum condition, reaction temperature 190℃, glycerol dosage 175% (based on theoretical dosage), catalyst dosage 2% (based on oil mass) and reaction time 3 h. After pre-esterification, the biodiesel was obtained by alcoholysis reaction, and the yield of fatty acid methyl ester in alcoholysis reaction was 95.21%. |
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