Quaternary (liquid + liquid) equilibria for (water + ethanol + toluene + 1,1-dimethylethyl methyl ether or 1,1-dimethylpropyl methyl ether) at the temperature 298.15 K

Quaternary (liquid+liquid) equilibria for (methanol+2,2,4-trimethylpentane+toluene+1,1-dimethylpropyl methyl ether or 1,1-dimethylethyl methyl ether) at T=298.15K

“…The modified and extended UNIQUAC models [2,3] assume no chemical equilibria between associating molecules and were developed to attribute their specific molecular interaction to the surface parameter q 0 relates to the surface area of the molecules whose value of associating components was empirically fixed to obtain a good representation for binary (vapour + liquid) equilibria of (methanol + non-associating component), while the value of non-associating components was set to be q 0.2 in the extended UNIQUAC model and q 0.75 in the modified UNIQUAC model. Table 4 gives the values of r and q for MTBE and TAME calculated by BondiÕs method [16] and the others taken from Prausnitz et al [17] The adjustable binary parameter s ji obtained from the constituent binary phase equilibrium data is defined by the binary energy parameter a ji .…”

“…The experimental results are predicted by using an associated-solution model [1] having binary parameters obtained from binary phase equilibria and are reproduced by modified and extended forms of the UNIQUAC models [2,3] including ternary and quaternary parameters obtained from the ternary and quaternary (liquid + liquid) equilibria in addition to binary ones. The binary (vapour + liquid) equilibria, mutual solubility and ternary (liquid + liquid) equilibria relevant to the quaternaries have been available from the literatures: (vapour + liquid) equilibria, (methanol + TAME) [4], (methanol + MTBE) [4], (methanol + toluene) [5], (TAME + MTBE) [6], (TAME + toluene) [7], (MTBE + toluene) [8], 0021 (TMP + toluene) [9], (TAME + TMP) [7] and (MTBE + TMP) [10]; mutual solubilities, (methanol + TMP) [1]; ternary (liquid + liquid) equilibria, (methanol + TA-ME + TMP) [1], (methanol + MTBE + TMP) [1] and (methanol + toluene + TMP) [1].…”