Abstract Solvent extraction plays a significant role as an energy-efficient treatment method in the recovery of phenol from wastewater, and a key step is to screen a promising extraction agent with a highly efficiency and good chemical stability. In this study, dibutyl ether (DBE) with low solubility and good stability was selected as the potential solvent to remove phenol from aqueous phase. Liquid-liquid equilibrium data for the (water + phenol + DBE) were determined at T= (298.15, 313.15, 323.15 and 333.15) K under ambient pressure. Effect of temperature on distribution coefficients and separation factors were investigated. The measured results were satisfactorily correlated by the NRTL and UNIQUAC models. The reliability of the tie-lie data was evaluated by the Othmer-Tobias and Hand equations. The Gibbs minor common tangent test was investigated according to previous published method. Moreover, DBE’s extraction performance is further analysed by σ-profile which can reflect the molecular interaction energy.

中文翻译：

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不同温度下（二丁醚+苯酚+水）体系液液平衡的实验研究

摘要 溶剂萃取作为一种高效节能的废水回收苯酚处理方法发挥着重要作用，关键是筛选出一种高效、化学稳定性好的萃取剂。在本研究中，选择溶解度低、稳定性好的二丁醚 (DBE) 作为去除水相中苯酚的潜在溶剂。（水 + 苯酚 + DBE）的液-液平衡数据是在环境压力下在 T=（298.15、313.15、323.15 和 333.15）K 下确定的。研究了温度对分配系数和分离因子的影响。测量结果与 NRTL 和 UNIQUAC 模型的相关性令人满意。平局数据的可靠性通过 Othmer-Tobias 和 Hand 方程进行评估。根据先前公布的方法研究了吉布斯次要公切线检验。此外，通过反映分子相互作用能的σ-profile进一步分析了DBE的提取性能。