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

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

研究论文

1-乙基-3-甲基咪唑磷酸二甲酯盐+K3PO4/K2HPO4/K2CO3+H2O 离子液体双水相体系在T＝298.15 K 时相图数据的测量和相关性

  • 王良 ,
  • 朱红 ,
  • 闫永胜
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  • a 吉林师范大学化学学院 四平 136000;
    b 环境友好材料制备与应用省部共建教育部重点实验室 四平 136000;
    c 江苏大学化学化工学院 镇江 212013

收稿日期: 2011-07-22

  修回日期: 2011-12-02

  网络出版日期: 2011-12-12

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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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摘要

实验测定了1-乙基-3-甲基咪唑磷酸二甲酯盐(1-ethyl-3-methylimidazolium dimehtyl phosphate, [Emim]DMP)+盐(K3PO4, K2HPO4 和K2CO3)+H2O 体系在298.15 K 的双节点数据. 用3 个经验方程与双节点数据关联, 发现Merchuk 方程简便并且准确性好. 不同盐的分相能力顺序为K3PO4>K2HPO4>K2CO3, 这与水合离子Gibbs 自由能(ΔhydG)有关. 用Othmer-Tobias 方程、Bancroft 方程和二元参数方程计算此方法和相应系线数据的可靠性. [Emim]DMP 是常见的离子液体, 广泛用于萃取石油燃料中的硫. 报道了[Emim]DMP+盐+H2O 体系的相图数据.

关键词： 相图数据; [Emim]DMP; K3PO4/K2HPO4/K2CO3; 离子液体双水相体系

本文引用格式

王良 , 朱红 , 闫永胜 . 1-乙基-3-甲基咪唑磷酸二甲酯盐+K3PO4/K2HPO4/K2CO3+H2O 离子液体双水相体系在T＝298.15 K 时相图数据的测量和相关性[J]. 化学学报, 2012 , 70(06) : 707 -713 . DOI: 10.6023/A1107222

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

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