摘要
通过单因素试验和正交试验研究了超临界流体萃取柿叶精油的影响因素,并对生产工艺进行了优化设计。试验结果表明,萃取压力、萃取温度、CO2流量、萃取时间对萃取得率的影响程度依次递减。最佳工艺条件为,100g柿叶在萃取压力18MPa、萃取温度50℃、CO2流量20kg/h、萃取时间2.5h,得率为3.1%。用超临界CO2萃取柿叶精油比水蒸气法蒸馏的柿叶精油得率提高了55%,萃取物纯度高,有浓郁的柿果香味,色淡黄。
Factors in the supercritical fluid extraction of Diospyros kaki leaves through single factor test and orthogonal test were studied. The flow chart was optimized. The results showed that the effects of factors in the decreased order are： pressure, temperature, CO2 flow rate and time. The best extraction condition could be obtained： 100 g D. kaki leaves at pressure 18 MPa, temperature 50 ℃, CO2 flow rate 20 kg/h and time 2.5 h,extraction yield 3.1%. The yield of essential oil by supercritical CO2 extraction（SCDE） was increased 55 % than steam distillation. The oil is a light yellow liquid with high purity and strong flavoring of D. kaki fruit.
出处
《林产化学与工业》
EI
CAS
CSCD
2005年第3期55-58,共4页
Chemistry and Industry of Forest Products
关键词
超临界CO2萃取
柿叶
精油
supercritical carbon dioxide extraction
Diospyros kaki leaves
essential oil
