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《The Chinese Journal of Process Engineering》 2009-04
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Extraction of Essential Oil and Carthamin from Safflower Dreg with Supercritical CO_2

HAN Xiao-jin1,2,ZHANG Rong1,BI Ji-cheng1(1.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan,Shanxi 030001,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
To obtain safflower essential oil and carthamin from safflower dreg by supercritical CO2 two-step extraction,a series operational parameters of pressure,temperature and CO2 flow rate were investigated in a bench-scale apparatus.The result shows that the rise of CO2 flow rate and the decrease of temperature lead to the increase in extraction rate of safflower dreg.Furthermore,the optimum conditions of extraction of safflower dreg are:in the first-step extraction,temperature at 35℃,pressure at 9 MPa,CO2 flow rate at 3.74 kg/h,in the second-step extraction,temperature at 35℃,pressure at 30 MPa,and CO2 flow rate at 3.74 kg/h.The extraction rates of essential oil and carthamin are 2.74% and 69.88%,respectively.
【CateGory Index】: TQ461
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