Liquid–liquid
equilibrium (LLE) data for the ternary system
2-methoxy-2-methylpropane (methyl tert-butyl ether)
+ o-cresol + water were experimentally measured at
atmospheric pressure and temperatures of 298.15 K and 313.15 K. From
the resulted distribution coefficient and selectivity, we can find
that 2-methoxy-2-methylpropane is an efficient solvent to extract o-cresol. The consistency of experimental tie-line data
was verified by the Hand and Bachman equations. The binary interaction
parameters among these compounds were obtained through correlation
of the experimental data with the nonrandom (NRTL) and universal quasichemical
(UNIQUAC) models. Both models yielded results in good agreement with
experimental data, and the average deviation of the NRTL model was
even smaller than that from the UNIQUAC model.
In the present work, liquid−liquid equilibria (LLE) data for ternary systems, water + propionic acid or butyric acid + methyl tert-butyl ketone (MTBK), at (298.15 and 323.15) K under atmospheric pressure were measured. The reliability of the experimental LLE data was verified by the Othmer−Tobias and Hand equations. The distribution coefficient, together with the selectivity, was used to assess the extraction performance of MTBK. The universal quasichemical activity coefficient (UNIQUAC) and nonrandom two-liquid (NRTL) models were used to correlate the experimental tie-line data, and binary interaction parameters for relevant process simulation were thus obtained.
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