Measurement and Prediction, by EOS-group contribution Method, Necessary for separating phenols in Wastewater

在废水中酚类物质的分离过程中，甲苯萃取和超临界二氧化碳萃取是有效的分离方法。本文涉及实验和理论研究，当考虑苯酚+水+溶剂的液-液平衡时，基本性质是二元互溶度与温度的关系。为了验证甲苯的溶剂效应，测定了苯酚+水+甲苯体系的液液平衡，并与实验结果进行了比较。采用EOS-基团贡献法预测了超临界CO2的溶剂效应，证实了CO2也是一种有效的溶剂。

When the process to separate phenols in wastewater is considered, the extractions by toluene and supercritical carbon dioxide are useful processes. This deals with the experimental and theoretical studies.When the liquid-liquid equilibria for phenol + water + solvents are considered, the fundamental properties are the relationships between binary mutual solubilities and temperatures. The relation was correlated from the representation of temperature dependence of SILS parameters using quardratic equation.In order to check the solvent effect of toluene, the liquid-liquid equilibria were measured for phenol + water + toluene system. It was confirmed that toluene is effective solvent.A EOS-group contribution method was used to predict the solvent effect of supercritical carbon dioxide and it was confirmed the carbon dioxide is useful solvent, too.