超临界CO_2萃取条件对α-V_E和脂肪酸萃取效果的研究

Studies on Influence of Supercritical Extraction Conditions on α-Vitamin E and Free Fatty Acids in Supercritical CO_2

以豆油脱臭馏出物为原料 ,利用超临界二氧化碳萃取技术浓缩α -VE,探讨萃取压力、萃取温度和二氧化碳流量对α -VE 和豆油脱臭馏出物中几种主要脂肪酸萃取效果的影响 ,结果表明 :萃取压力和萃取温度对α -VE 和几种主要脂肪酸在超临界二氧化碳中的溶解效果有非常显著的影响 ,萃取压力增加 ,萃取得率和α -VE 含量随着增加 ,萃取温度升高 ,萃取得率下降 ,而二氧化碳流量对萃取效果影响较小 在萃取温度 30 8K、萃取压力 1 8MPa、二氧化碳流量 6～ 1 0L/min的萃取条件下 ,可以获得较高的萃取得率和α -VE

With soybean deodorized sludge as the raw material, α- V E is extracted by using supercritical CO 2 method The influence of extraction conditions on solubility of α- V E and several main fatty acids in supercritical CO 2 is discussed.The results show that extraction pressure and temperature have conspicuous effects on solubility of α- V E and fatty acids in supercritical CO 2,while CO 2 flow volume has little effect on extraction result. At extraction temperature 35℃, pressure 18MPa,CO 2 flow volume 6～10L/min, A relatively high extracted weight and high α- V E content can be obtained.