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

doi:10.6023/A1107222

Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (06): 707-713.DOI: 10.6023/A1107222 Previous Articles Next Articles

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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^a,b, 朱红^a,b, 闫永胜^c

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

投稿日期:2011-07-22 修回日期:2011-12-02 发布日期:2011-12-12
通讯作者: 闫永胜

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^a,b, Zhu Hong^a,b, Yan Yongsheng^c

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:2011-07-22 Revised:2011-12-02 Published:2011-12-12

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 (Δ_hydG). 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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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.

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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

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

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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