期刊
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
卷 29, 期 1, 页码 1-6出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2005.01.004
关键词
liquid-liquid equilibrium; polyethylene glycol; organic salt; binodal model; NRTL model
Liquid-liquid equilibria were determined for the PEG6000-sodium succinate-H2O, and PEG(6000)-sodium formate-H2O systems at 298.15 K. Furthermore, the binodal model was used for reproducing the experimental binodal data. The effective excluded volume values obtained from the binodal model for these two systems and other aqueous PEG(6000)-salt systems were determined; and the relation between these values and salting-out ability of different salts were discussed. Finally, a two-parameter equation and the NRTL model were used for the correlation of the obtained tie-line data. Good agreement was obtained with the experimental tie-line data with both models. (c) 2005 Elsevier Ltd. All rights reserved.
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