摘要
本文建立了由一种无机盐(硫酸铵)和一种高聚物(聚乙二醇)及水所组成的三元体系(不含生物物质)的平衡浓度分析方法,实验共测定了聚乙二醇数均分子量分别为1000,1540,2000和4000四种共43组在25℃下的液-液平衡数据(包括临界点数据)。将UNIQUAC和UNIFAC方程分别扩展,并与Fowler-Guggenheim长程静电项相结合,关联了此双水相三元液-液平衡数据,结果表明:扩展的UNIFAC方程对此三元体系具有预测推算的功能。
The quantitative analysis method for the study on liquid-liquid equilibria (LLE) of ammonium sulfate-polyethylene glycol (PEG) aqueous two-phase ternary system was established. LLE together with critical point data of four series of experiments composed of different molecular weight of PEG (1000, 1540, 2000 and 4000) at 25℃ were determined. The modified UNIQUAC and UNIFAC equations, combined with the Fowler-Guggenheim equation, are proposed for the correlation of LLE data. The calculated concentration values are in good agreement with the experimental ones. The modified UNIFAC equation has the predictability for the (NH4)2SO4-PEG-H2O system.
出处
《高校化学工程学报》
EI
CAS
CSCD
1990年第4期291-301,共11页
Journal of Chemical Engineering of Chinese Universities
关键词
硫酸铵
聚乙二醇
液液平衡
热力学
Ammonium sulfate, Polyethylene glycol, Liquid-liquid equilibrium
