超声强化超临界CO2萃取樟树叶精油的研究

摘要

采用超声波强化超临界CO2萃取樟树叶精油,并采用正交实验对萃取工艺进行了优化.研究结果表明:当萃取压力为16MPa、温度为50℃、时间为80min、CO2流量为16kg/h、超声波功率为240W、超声波频率为20KHz时,能获得比较好的效果,精油的平均提取率可达1.92％.GC-MS的分析结果表明:樟树叶精油中樟脑+β-芳樟醇的含量最大,含量为23.99％,其次为桉油醇和α-松油醇,含量分别为15.69％和11.01％.%Essential oil of camphortree leaves extracted with ultrasonic enhancement of supercritical CO2 and the preparation tech-nology was optimized with orthogonal experiment The research showed that the new process could get a better result as the extrac-tion pressure was 16 Mpa,temperature was 50℃,extraction time was 80 min,CO2 flux was 16 kg/h,ultrasonic power was 240 W and ultrasonic frequency was 20KHz, the average yield of essential oil of camphortree leaves was 1. 92%. The analysis of GC-MS in-dicated that the content of camphor andβ-linalool was the largest in the essential oil,it was 23. 99% ;eucalypot andα-terpinol was the second,it was 15. 69% and 11. 01% .respectively.