超临界CO2萃取洋葱油的研究

范文编号:ZY002    范文字数:8068,页数:16

摘 要：本范文通过对不同存在状态下的洋葱分别进行超临界CO2萃取实验。分别以烘干洋葱粉，冻干洋葱粉，鲜洋葱为试材，研究了超临界CO2 流体萃取洋葱油技术中萃取压力、萃取温度、萃取时间以及夹带剂用量等对洋葱油得率的影响,并确定实验室最佳实验材料及萃取的最佳条件。结果表明，以冻干洋葱粉为原料,加入无水乙醇15%为夹带剂,萃取压力28MPa,萃取温度42℃,萃取时间216min,洋葱油得率可达到0.483%。

关键词：超临界CO2；萃取；洋葱油

Study on the Supercritical Carbon Dioxide Extraction of Onion Oil
Student’s name:YU Hao-feng         Advisor:YE Chun-ling
(School of Biological and Chemical Engineering Zhejiang University of Science and       Technology) 
 
 
Abstract: Onion oil were extracted by supercritical CO2 fluid. Different state of onions, which, dried onion powder, freeze-dried onion powder, fresh onion, were used. The effect of extraction pressure, extraction temperature, extraction time and amount of cosolvent on the yield of onion oil, was determined. The results showed that the optimom technological contition were freeze-dried onion powder, added 15% ethanol as cosolvent, extraction pressure of 28MPa, extraction temperature 42℃, extraction time 216 min, with onion oil yield of 0.483%. 
 
Key words: Supercritical dioxide carbon; Extraction; Onion oil

目   录
中文摘要
英文摘要
目录
1．　绪论 1
　 1.1 概述 1
 1.2 洋葱油的主要成分 1
   1.3 洋葱油的保健功效 1
   1.4  超临界萃取原理 2
2.  实验部分 4
   2.1  实验材料 4
   2.2  实验仪器和试剂 4
   2.3  实验方法 4
3.  结果与讨论 6
 3.1原料的不同干燥方式对洋葱油得率的影响 6
 3.2不同含水率对洋葱油得率的影响 6
 3.3萃取压力对洋葱油得率的影响 7
 3.4萃取温度对洋葱油得率的影响 8
 3.5萃取时间对洋葱油得率的影响 9

3.6夹带剂用量对洋葱油得率的影响 9
 3.7超临界CO2流体萃取洋葱油的最佳工艺参数的确定 9
4.  总结与展望 10
 4.1 实验总结 10
   4.2 展望 11
致谢 12
参考文献 13

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