Liquid–Liquid Equilibria for the Ternary System 2-Methoxy-2-methylpropane + Phenol + Water

Abstract

Liquid–liquid equilibria data for the ternary system 2-methoxy-2-methylpropane (methyl tert-butyl ether) + phenol + water were measured at temperatures of (298.15, 313.15, and 323.15) K at atmosphere pressure. The distribution coefficient and selectivity were used to evaluate the extraction performance of the 2-methoxy-2-methylpropane. The reliability of the experimental tie-line data was verified by the Hand and Bachman equations. The experimental data were correlated with the NRTL and UNIQUAC models. The binary interaction parameters of these two models were reported. Both models correlated the experimental data successfully. In comparison, the NRTL model presents a better prediction than the UNIQUAC model.

A simple model for precisely describing liquid–liquid equilibrium and better understanding extraction mechanism

“…These systems had the plateau of concentration and the higher value of n than unity, for which the Freundlich might fail, the assumption of the Langmuir ( n = 1) could not apply, and the Redlich‐Peterson was not good enough either. In Table S2, moreover, the model can be still comparable with the linear model in term of the precision 29,36‐38,49 . It is worth noting that all the systems tested can be well correlated by the present model, including separation of organic substances (phenols, acids, nitrogens, and sulfurs) from oil or water and recovery of inorganic metal ions (Li + , Cu 2+ , and Pr 3+ ) from the water.…”

“…Besides, the model (Equation )) becomes linear when n = 1 and K [ C A (α)] ≪ 1. Thereby, the model was used to correlate the concentration distribution data that vary linearly, as shown in Figure S2 29,36‐38 . As seen in Figure 2, the non‐linear model is precisely applicable for the linear systems as well.…”

“…Model fitting for four linear systems. Note : I. the data were from the literatures: Reference 29 for (a), Reference 36 for (b), Reference 37 for (c), and Reference 38 (d); II. T = 303.15 K for (a), 323.15 K for (b), and 298.15 K for (c) and (d); III.…”

Measurement and thermodynamic modeling of ternary (liquid + liquid) equilibrium for extraction of o-cresol, m-cresol or p-cresol from aqueous solution with 2-pentanone

“…And there is also an evident decreasing tendency shown in distribution coefficients and separation factors with the increasing of cresol's concentration in the aqueous phase or in the organic phase at a certain temperature, indicating that concentration also put a vital effect on the distribution ratios of cresol among organic phase and aqueous phase and on the separation factors. Such temperature and concentration dependence could also be commonly observed in many other ternary systems, especially phenols containing systems [34][35][36][37][38][39]. It can also be seen from figures 7 and 8 that, the influence of the structure of cresol isomers on the extractive properties of 2-pentanone is insignificant, as the distribution coefficients and separation factors are very close for the three cresol isomers when using 2-pentanone as the extraction agent.…”

Ternary liquid – Liquid equilibria for methyl isopropyl ketone + (resorcinol or hydroquinone) + water systems at different temperatures

“…Furthermore, Tables 2 and 3 show that, distribution coefficients and separation factors decrease as the concentration or temperature increases in the studied range. Such dependence of distribution coefficients (or separation factors) on concentration or temperature has been observed in various of other (extractant + phenols + water) ternary systems [18,28]. This indicates that, it is necessary to screen possible extractants more carefully, and further strengthen the advantages of MIPK over other solvents, when the extract process is designed to perform at elevated temperatures [29] or to treat streams with high phenols concentration [1,2].…”