Study of Extraction by Supercritical Fluid Entrained by Third Component

1)在8[20 MPa的压力范围内，测定了维生素e、三棕榈素和棕榈酸在压缩二氧化碳中的溶解度。这两个系统的数据用两个二元参数的三次状态方程进行了令人满意的关联。2) <CO_2>夹带<H_2O>对维生素e的溶解度没有增强作用。系统的相行为非常复杂，状态方程无法描述平衡关系。另一方面，乙醇夹带的液体会显著改变其溶解度。溶解度变化适用于经验方程。3)甲基乙基酮夹带的超临界<CO_2>明显改变了硬脂酸的溶解度。

1) Solubilities of vitamin-E, tripalmitin and palmitic acid in compressed carbon dioxide were measured in a pressure range of 8[20 MPa. The data of these systems were correlated satisfactorily by a cubic equation of state using two binary parameters.2) The solubility of vitamin-E was not enhanced by the supercritical <CO_2> entrained with <H_2O> . The phase behavior for the system was very complicated, then, the equation of state could not discribe the equilibrium relation. The other hand, the fluid entrained by ethanol could change the solubility considerably. An empirical equation was applicable to the solubility change.3) Supercritical <CO_2> entrained by methyl ethyl ketone changed the solubility of stearic acid drastically.