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Issue
Korean Journal of Chemical Engineering,
Vol.33, No.4, 1408-1415, 2016
Liquid-liquid equilibrium data in aqueous solutions of propionic and butyric acids with 1-heptanol at T=(298.15, 308.15, and 318.15) K
Gilani AG, Gilani HG, Saadat SLS, Nasiri-Touli E, Peer M
Liquid-liquid phase equilibrium (LLE) data were determined for the (water+propionic or butyric acid+1-heptanol) ternary systems at T=(298.15, 308.15, and 318.15) K and p=101.3 kPa. For both systems, a type-1 LLE phase diagram was obtained. The quality of the experimental LLE data was determined through the Othmer-Tobias and Bancroft equations. The experimental tie-lines were fitted using the UNIQUAC and NRTL correlation models. For the studied systems, a comparison was made between the experimental and correlated distribution coefficients and separation factors. The LSER model of Katritzky was applied to obtain the contributions of intermolecular interactions in these systems.
Keywords: Liquid-liquid Equilibrium; Carboxylic Acid; UNIQUAC Model; NRTL Model; LSER Model
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