Quaternary liquid-liquid equilibrium, solubility and critical states: Acetic acid - n-butanol - n-butyl acetate - water at 318.15 K and atmospheric pressure
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Smirnov, Alexander
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St Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, RussiaSt Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, Russia
Smirnov, Alexander
[1
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Sadaeva, Anna
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St Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, RussiaSt Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, Russia
Sadaeva, Anna
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Podryadova, Kristina
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St Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, RussiaSt Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, Russia
Podryadova, Kristina
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Toikka, Maria
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St Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, RussiaSt Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, Russia
Toikka, Maria
[1
]
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[1] St Petersburg State Univ, Dept Chem Thermodynam & Kinet, Univ Skiy Prospect 26, St Petersburg 198504, Russia
Experimental data on solubility, critical states and liquid liquid equilibrium (LLE) for the quaternary system acetic acid - n-butanol - n-butyl acetate - water and ternary subsystems acetic acid - n-butanol - water, n-butanol - n-butyl acetate - water and acetic acid - n-butyl acetate - water were obtained at 318.15 K and at atmospheric pressure. The solubility and critical states were studied by isothermal titration method ("cloud-point technique"). The LLE was determined using gas chromatographic analysis. Binodal surface in quaternary system and binodal curves in ternary systems were constructed. Compositions of critical points (plait points) and critical curve were determined. The NRTL model was applied to calculate the LLE data for the quaternary and ternary systems. The results of NRTL modeling are in good agreement with the experimental data. (C) 2019 Elsevier B.V. All rights reserved.