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首页> 外文期刊>Fluid Phase Equilibria >Phase diagrams for liquid-liquid equilibrium of ternary poly(ethylene glycol) plus di-sodium tartrate aqueous system and vapor-liquid equilibrium of constituting binary aqueous systems at T = (298.15, 308.15, and 318.15) K - Experiment and correlation
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Phase diagrams for liquid-liquid equilibrium of ternary poly(ethylene glycol) plus di-sodium tartrate aqueous system and vapor-liquid equilibrium of constituting binary aqueous systems at T = (298.15, 308.15, and 318.15) K - Experiment and correlation

机译：T =（298.15、308.15和318.15）K时三元聚（乙二醇）加酒石酸二钠水溶液体系的液-液平衡相图和构成二元水性体系的气液平衡相图-实验和相关性

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摘要

Liquid-liquid equilibria (LLE) for the aqueous polyethylene glycol 4000 (PEG(4000)) + di-sodium tartrate system and the vapor-liquid equilibria (VLE) of the corresponding binary aqueous systems (i.e. PEG4000 + water and di-sodium tartrate + water) have been determined experimentally at T =(298.15, 308.15 and 318.15) K. The effects of temperature on the binodals and tie-lines for the investigated aqueous two-phase system (ATPS), as well as the water activities obtained from the VLE data for the aforementioned binary aqueous systems have been studied. Furthermore, the modified local composition segment-based NRTL and Wilson models, proposed recently by Sadeghi to describe the VLE of several aqueous polymer-salt systems, have been used for the correlation of the phase behavior of the studied systems. Good agreement was obtained with the experimental VLE data with these models. For the studied ATPS, while the successful regeneration of the experimental LLE data were demonstrated with the modified NRTL and Wilson models, especially with the unrestricted parameters, no satisfactory results were obtained for the temperatures 308.15 and 318.15 K, using the modified Wilson model with restricted parameters in which the binary model parameters between water and the segments of polymer or salt obtained from the VLE data. Results are also compared with those obtained from the extended NRTL and the extended Wilson models
机译：聚乙二醇4000（PEG（4000））+酒石酸二钠水溶液的液-液平衡（LLE）和相应二元水溶液系统（即PEG4000 +水和酒石酸二钠）的气液平衡（VLE） +水）已在T =（298.15、308.15和318.15）K处通过实验确定。温度对所研究的水相两相系统（ATPS）的二线对数和联系线的影响以及从中获得的水活度已经研究了上述二元水性系统的VLE数据。此外，最近由Sadeghi提出的用于描述几种水性聚合物盐体系的VLE的基于局部成分链段的NRTL和Wilson模型经过修改，已用于研究系统的相行为相关。这些模型的实验VLE数据获得了很好的一致性。对于研究的ATPS，虽然使用改进的NRTL和Wilson模型（尤其是使用不受限制的参数）证明了成功的实验LEE数据的再生，但使用具有限制的改进的Wilson模型无法获得令人满意的温度308.15和318.15 K的结果。参数，其中从VLE数据获得的水与聚合物或盐段之间的二元模型参数。还将结果与从扩展NRTL和扩展Wilson模型获得的结果进行比较

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