多元渗透维里方程通式的表达双水相系统的液液平衡计算  

Generalization of Osmotic Virial EquationApplication in Calculating Phase Equilibria of Aqueous Two phase Systems

作　　者：吴有庭[1] 朱自强[1] 林东强[1] 梅乐和[1] 

机构地区：[1]浙江大学化工系

出　　处：《高校化学工程学报》1997年第4期337-342,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金

摘　　要：提出了基于三元系修正Ｐｉｔｚｅｒ模型的多元渗透维里方程通式，并应用于双水相系统液液平衡性质的关联和预测。用汽液平衡数据关联模型参数，预测了聚乙二醇（ＰＥＧ）／硫酸镁双水相系统的液液平衡；用汽液平衡数据和尽可能少的液液平衡数据关联模型参数，同时预测了含或不含电解质的ＰＥＧ／葡聚糖（ＤＥＸ）双水相系统的液液平衡和ＫＣｌ电解质在ＰＥＧ／ＤＥＸ系统中的分配系数。计算结果表明，模型有较好的预测功能。A generalized multicomponent osmotic virial equation is proposed and applied to calculate the phase behavior of aqueous two phase system. By only using the vapor liquid equilibrium (VLE) data, the liquid liquid equilibrium (LLE) data of polyethylene glycol (PEG)/MgSO 4/H 2O systems are predicted; by using the VLE data and parts of LLE data (as few as possible), the phase diagrams of PEG/dextran (DEX)/H 2O and PEG/DEX/KCl/H 2O systems are simultaneously predicted. In addition, the partitioning coefficients of KCl in aqueous two phase systems can also be predicted. The results show that the model can give a good representation of the phase diagrams and the partitioning coefficients of the salt.

关 键 词：多元 渗透维里方程 液液平衡 双水相系统 

分 类 号：O642.42[理学—物理化学]