超临界 CO2萃取洋葱精油的试验研究

摘要

采用单因素试验和正交试验相结合的方法研究超临界 CO2萃取洋葱精油的工艺。得到的最佳工艺条件为萃取压力28 MPa、萃取温度45℃、萃取时间300 min、一级分离压力7 MPa、温度40℃、二级分离压力5 MPa、温度35℃、冻干红洋葱粉、粒径：0.38 mm时间(C)>温度(B)。%The extraction process of onion essential oil from onion using supercritical CO2 is studied via orthogonal experiment and single-factor experiment.The results show that the optimum extraction conditions are as follows:the extraction pressure of 28 MPa,the extraction temperature of 45 ℃,the extraction time of 300 min,CO2 circulation flow rate of (10±2)L/h,the particle size of 0.38 mmtime>temperature.