Abstract

In recent years, considerable attention has been given to the capability of deep eutectic solvents (DESs) to replace ionic liquids in extraction processes. The objective of this study is to determine the physicochemical parameters of heterogeneous systems and phase equilibria in industrially important mixtures that contain DESs. Ethanol–ethyl acetate–DES, n-propanol–n-propyl acetate–DES, and n-butanol–n-butyl acetate–DES systems have been investigated at a temperature of 293.15 K and atmospheric pressure. DESs based on choline chloride, namely, its mixtures with glycerin and urea, have been studied. An analysis of the capability of DESs to separate the specified mixtures of alcohols and esters has been performed using data on the equilibrium compositions of coexisting liquid phases. The nonrandom two-liquid (NRTL) model has been used to correlate experimental data on liquid–liquid equilibria.

中文翻译：

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醇-酯体系中深共晶溶剂的相平衡和萃取性能

摘要

近年来，人们对深共晶溶剂（DES）在萃取过程中替代离子液体的能力给予了极大的关注。这项研究的目的是确定含有DES的重要工业混合物中非均相系统的理化参数和相平衡。乙醇-乙酸乙酯- DES，Ñ -propanol- Ñ丙基乙酸-DES，和Ñ -butanol- Ñ乙酸丁酯-DES系统已在293.15 K的温度和大气压下进行了研究。已经研究了基于氯化胆碱的DES，即其与甘油和尿素的混合物。使用关于共存液相平衡组成的数据，对DES分离特定的醇和酯混合物的能力进行了分析。非随机两液（NRTL）模型已用于关联液-液平衡的实验数据。