期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 199, 期 -, 页码 115-122出版社
ELSEVIER
DOI: 10.1016/j.molliq.2014.08.026
关键词
Liquid-liquid equilibrium; 1-Butyl-pyridinium tetrafluoroborate; Organic salt; Aqueous two-phase systems
资金
- National Natural Science Foundation of China [41472220]
- Research and Development Project of Science and Technology of Shaanxi Province [2013JQ2019]
- Fundamental Research Funds for the Central Universities [0009-2014G2290017]
- National Training Projects of the University Students' Innovation and Entrepreneurship program [201310710057, 201410710060]
- China Postdoctoral Science Foundation [2014M552400]
Liquid-liquid equilibrium data have been determined for 1-butyl-pyridinium tetrafluoroborate([Bpy]BF4) + ammonium citrate ((NH4)(3)C6H5O7)/trisodium citrate (Na3C6H5O7)/sodium succinate (Na2C4H4O4)/sodium acetate(CH3COONa) aqueous two-phase systems at T = 303.15 K, respectively. The effective excluded volume (EEV) values obtained from the binodal model for these four systems were determined, which indicates that the salting-out abilities of the four salts follow the order: Na3C6H5O7 > (NH4)(3)C6H5O7, Na3C6H5O7 > Na2C4H4O4 > CH3COONa. Then the binodal data were modeled by Merchuk and another two parameter equations. The Othmer-Tobias, Bancroft, two-parameter and Setschenow-type equations were used for the correlation of the tie-line data. Both the correlations of binodal data and tie-line data show good agreement for the investigated systems. (C) 2014 Elsevier B.V. All rights reserved.
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