Salting Effect on the Liquid-Liquid Equilibria for the Partially Miscible Systems of n-Propanol-Water and i-Propanol-Water
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- 作者：Tzu-Jen Chou ; Akihiko Tanioka ; and Hsieng-Cheng Tseng
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：1998
- 出版时间：May 1998
- 年：1998
- 卷：37
- 期：5
- 页码：2039 - 2044
- 全文大小：80K
- 年卷期：v.37,no.5(May 1998)
- ISSN：1520-5045
文摘
The liquid-liquid equilibria (LLE) data were experimentallymeasured for the partially misciblesystems of n-propanol-water-NaCl,n-propanol-water-NaBr,n-propanol-water-KCl, andi-propanol-water-NaCl at 25 
C. A method ofcalculation for the prediction of the salting effecton the LLE of organic aqueous solutions was proposed to correlate theexperimental tie-linedata. In the proposed method, the activity coefficients of thesolvents were calculated by Tan'smodified Wilson model which was combined with a vapor pressure model ofelectrolyte solutions,and the mean ionic activity coefficient was calculated by theGibbs-Duhem equation. Theparameters required by the proposed method could be estimated by thevapor pressures of awater-salt system and the alcohol-water interaction parameters inthe liquid-phase activitycoefficient model. No ternary parameter was required. Theproposed method has been used topredict the LLE data measured by this work, and the overall averagedeviation of tie-linecompositions was 0.018.
C. A method ofcalculation for the prediction of the salting effecton the LLE of organic aqueous solutions was proposed to correlate theexperimental tie-linedata. In the proposed method, the activity coefficients of thesolvents were calculated by Tan'smodified Wilson model which was combined with a vapor pressure model ofelectrolyte solutions,and the mean ionic activity coefficient was calculated by theGibbs-Duhem equation. Theparameters required by the proposed method could be estimated by thevapor pressures of awater-salt system and the alcohol-water interaction parameters inthe liquid-phase activitycoefficient model. No ternary parameter was required. Theproposed method has been used topredict the LLE data measured by this work, and the overall averagedeviation of tie-linecompositions was 0.018.