Biphasic Systems That Consist of Hydrophilic Ionic Liquid, Water, and Ethyl Acetate: The Effects of Interactions on the Phase Behavior

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• 作者：Yifeng Cao ; Huabin Xing ; Qiwei Yang ; Zhenkang Li ; Ting Chen ; Zongbi Bao ; Qilong Ren
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：July 2, 2014
• 年：2014
• 卷：53
• 期：26
• 页码：10784-10790
• 全文大小：332K
• ISSN：1520-5045

文摘

The design of a biphasic system is important for the development of liquid鈥搇iquid extraction and biphasic catalysis. In this work, we report a series of ternary biphasic systems that consist of hydrophilic ionic liquid (IL), water, and ethyl acetate. The effects of the structure of the ILs (cation, anion, and substituent group), IL/water ratio, and temperature on the phase equilibrium of these biphasic systems were investigated. The mutual solubility was lower in the IL/water鈥揺thyl acetate biphasic system than in the water鈥揺thyl acetate system when ILs with strong hydration ability were introduced, such as [EMIm]OAc, [EMIm]Cl, [EMIm]NO₃, [EMIm]EtSO₄, and [HOEMIm]Cl. In addition, the hydrogen-bonding basicity of the IL-containing phase could be tuned by changing the IL structure or IL/water ratio. These novel IL/water-ethyl acetate biphasic systems may present another option in addition to hydrophobic IL鈥搘ater and aqueous biphasic systems for liquid鈥搇iquid extraction.