超临界CO_2萃取分离桔油中的萜烯和含氧化合物

Abstract

以冷榨柑橘精油为原料,采用gC/MS对柑橘精油原料进行定性及定量分析,确定了柑橘精油中的7种萜烯类化合物成分作为分离考察对象。实验探讨了超临界萃取压力、萃取温度、萃取时间和CO2流量等因素对含氧化合物分离效果的影响。实验结果表明,萃取相中萜烯类化合物的回收率总体上随着萃取压力、温度、时间和CO2流量的增大而增大。当萃取压力为12MPA,萃取温度为45℃,萃取时间为4H以及CO2流量为1.0l/MIn时,分离效果最佳,其萃取相中萜烯类化合物的回收率高达90.03%。

Supercritical CO2 extraction was employed to separate terpenes and oxygenated compounds from citrus oil.The raw oil,the extract,and the raffinate were qualitatively and quantitatively analyzed by GC/MS,respectively,with the terpenes being represented by seven typical compounds.The influences of several experimental factors including extration pressure,extraction temperature,extraction time and CO2 flow rate on the separation of the oxygenated compounds were studied.The results indicate that the recovery rate of terpenes in the extract generally increases with the increasing of extraction pressure,temperature,time and CO2 flow rate.The optimum conditions for extracting terpenes are as follows: pressure 12 MPa,temperature 45 ℃,extraction time 4 h,and CO2 flow rate 1.0 L/min.Under these optimum conditions,the recovery rate of terpenes in the extract is 90.03%.