超临界流体CO2萃取侧柏桧木精油工艺的优化

[目的]优化超临界流体CO2萃取侧柏桧木精油的工艺条件,为其开发利用提供参考依据.[方法]以侧柏为原料,采用单因素试验和正交试验考察动态萃取时间、萃取流量、萃取温度和静态萃取时间对桧木精油萃取效果的影响.[结果]影响侧柏桧木精油萃取效果的因素排序为：萃取温度＞动态萃取时间＞萃取流量＞静态萃取时间;超临界流体CO2萃取侧柏桧木精油的最佳工艺条件为：在萃取压力15 MPa、萃取流量500 L/h、萃取温度45℃条件下动态萃取4.0h,无需进行静态萃取,侧柏桧木精油萃取率为4.59％.[结论]超临界流体CO2萃取法是提取侧柏桧木精油的有效方法.

Extraction technology optimization of essential oil from Platycladus orientalis by supercritical fluid extraction

[Objective]The extraction technology of essential oil from Platycladus orientalis was optimized to provide references for its development and exploitation.[Method]The influence of dynamic extraction time,extraction flow,extraction temperature and static extraction time on essential oil extraction from Platycladus orientalis was evaluated using single factor test and orthogonal test.[Result]The sequence of influencing factors was extraction temperature ＞dynamic extraction time ＞ extraction flow ＞ static extraction time.The optimal technology conditions were extraction pressure of 15 MPa,extraction flow rate of 500 L/h,extraction time of 4.0 h,temperature of 45 ℃ and the static extraction time of 0 h.Under these conditions,the average yield was 4.59％.[Conclusion]Extracting essential oil from Platycladus orientalis by supercritical fluid extraction is effective.