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Quaternary liquid-liquid equilibrium, solubility and critical states: Acetic acid – n-butanol – n-butyl acetate – water at 318.15 K and atmospheric pressure

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...

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Bibliographic Details
Published in:Fluid phase equilibria 2019-08, Vol.493, p.102-108
Main Authors: Smirnov, Alexander, Sadaeva, Anna, Podryadova, Kristina, Toikka, Maria
Format: Article
Language:English
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Summary: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. •LLE for the acetic acid – n-butanol – n-butyl acetate – water have been determined at 318.15 K.•LLE compositions were correlated by NRTL model.•Solubility and compositions of critical points have been obtained at 318.15 K.•The critical surface in quaternary system was considered.
ISSN:0378-3812
1879-0224
DOI:10.1016/j.fluid.2019.04.020