猕猴桃籽油在超临界二氧化碳中的溶解度研究

Study on the Solubility of Kiwi Fruit Seed Oil in Supercritical Carbon Dioxide

【目的】研究猕猴桃籽油在超临界CO2中的溶解度为超临界CO2萃取猕猴桃籽油和进一步富集其中α-亚麻酸奠定基础。【方法】用动态相平衡法研究压力在20、25、30、35MPa,温度为35、40、45℃,水分含量为2.6%、4.08%、5.6%、6.0%、7.67%、9.23%时猕猴桃籽油在超临界CO2中的溶解度变化规律。【结果】超临界CO2萃取猕猴桃籽油的转变压力约为27.8MPa;压力在30MPa、35MPa,温度为40、45℃时,猕猴桃籽油的溶解度为8.9～11.2g·kg-1CO2;较适宜的萃取条件为压力30～35MPa、温度40℃;超临界CO2萃取猕猴桃籽油时物料的水分含量应保持在5%～7%为宜。【结论】通过动态相平衡法测定得出猕猴桃籽油及其脂肪酸酯在超临界CO2中的溶解度,为超临界CO2萃取猕猴桃籽油以及进一步精馏纯化提供了理论依据。

【Objective】 The extracting of kiwi fruit seed oil in supercritical carbon dioxid(eSC-CO2)and enriching α- linolenic acid from it further depends on the study of solubility of it in SC-CO2.【Method】Using the method of the dynamic phase equilibria, the paper studied the variation regulations of the kiwi fruit’s seed oil solubility of in SC-CO2. 【Result】Temperature increasing, and above this pressure the solubility increases with temperature rises;the solubility of kiwi fruit seed oil in SC-CO2 were 8.9-11.2 g·...