夹带剂对超临界CO2萃取茄尼醇过程的强化

夹带剂强化技术可显著提高超临界CO2萃取茄尼醇的萃取效率. 本工作在分析讨论萃取机理及夹带剂强化作用的基础上，研究了影响强化效应的夹带剂种类、用量、输入方式3个主要因素及其对茄尼醇萃取率的影响规律，并讨论了夹带剂与茄尼醇从萃取混合物中二级选择性解析的问题. 在设计夹带剂强化萃取茄尼醇正交实验的基础上，进一步分析了夹带剂用量、压力和温度影响茄尼醇萃取率的顺序及显著性. 最优强化萃取操作条件为压力25 MPa，温度40℃, 95%乙醇用量为1.5 mL/g. 并通过建立强化萃取茄尼醇的萃取率模型，对最优条件下超临界CO2萃取茄尼醇的萃取率进行预测，预测值为82.4%，与实验均值81.5%基本一致.

Enhancement of Entrainer on Supercritical CO2 Extraction of Solanesol from Tobacco

Entrainer enhancing technology can significantly improve the solanesol separation efficiency of supercritical CO2 extraction. Based on the principles of supercritical CO2 extraction and enhancing effects from entrainer, three influential factors of the solvents including the type, content and addition method on the extraction of solanesol are examined. How the solanesol and entrainer are selectively separated from the extractive is also discussed. By the orthogonal test of extracting solanesol with entrainer enhancing technology, the importance sequence and prominence are analyzed for the influential factors of entrainer content, pressure and temperature. The optimum conditions for the extraction process are obtained: 25 MPa, 40℃, 150 mL of 95% ethanol for 100 g tobacco. A mathematical model is established with which the yield of the optimum extraction rate of solanesol can be predicted in the present study. Under the optimum conditions of the process, the solanesol extraction rate by designed experiments, 81.5%, is consistant with the prediction value, 82.4%