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Acta Chimica Sinica >

2012 , Vol. 70 >Issue 06: 707 - 713

DOI: https://doi.org/10.6023/A1107222

Special Topic

Measurement and Correlation of the Phase Diagram Data for 1-Ethyl-3-methylimidazolium Dimethyl phosphate+K3PO4/ K2HPO4/K2CO3+H2O lonic Liquids Aqueous Two-Phase Systems at T＝298.15 K

  • Wang Liang ,
  • Zhu Hong ,
  • Yan Yongsheng
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  • a Department of Chemistry, Jilin Normal University, Siping 136000;
    b Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Siping 136000;
    c Department of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013

Received date: 2011-07-22

  Revised date: 2011-12-02

  Online published: 2011-12-12

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Abstract

Binodal data for the 1-ethyl-3-methylimidazolium dimethyl phosphate ([Emim]DMP)+salt (K3PO4, K2HPO4, and K2CO3)+H2O systems were experimentally determined at 298.15 K. Three empirical equations were used to correlate binodal data. The Merchuk equation is an uncomplicated one for fine accuracy. The ability of different salts studied for phase separation are in the order of K3PO4>K2HPO4>K2CO3, which may be related to the Gibbs free energy of hydration of the ions (ΔhydG). The reliability of the calculation method and the corresponding tie-line data was described by the Othmer-Tobias equation and Bancroft equation, as well as the two-parameter equation. [Emim]DMP is a familiar ionic liquid, which is extensively used for extractive desulfurization of fuel oils. This is the first time to report the data for phase diagrams of [Emim]DMP+salt+water systems.

Key words： phase diagram data; [Emim]DMP; K3PO4/K2HPO4/K2CO3; ionic liquids aqueous two-phase systems

Cite this article

Wang Liang , Zhu Hong , Yan Yongsheng . Measurement and Correlation of the Phase Diagram Data for 1-Ethyl-3-methylimidazolium Dimethyl phosphate+K3PO4/ K2HPO4/K2CO3+H2O lonic Liquids Aqueous Two-Phase Systems at T＝298.15 K[J]. Acta Chimica Sinica, 2012 , 70(06) : 707 -713 . DOI: 10.6023/A1107222

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