Tm. Letcher et al., LIQUID-LIQUID EQUILIBRIA FOR MIXTURES OF DIISOBUTYL KETONE PLUS AN ALKANOL PLUS WATER AT 298.15-K, Journal of chemical and engineering data, 41(4), 1996, pp. 701-706
Liquid-liquid equilibrium data are presented for mixtures of 2,6-dimet
hyl-4-heptanone (diisobutyl ketone) + an alkanol + water at 298.15 K.
The alkanols are methanol, ethanol, 1-propanol, 2-propanol, 1-butanol,
2-butanol, 2-methyl-1-propanol, and 2-methyl-2-propanol. The addition
of ethanol, 2-propanol, or 2-methyl-2-propanol is found to increase t
he solubility of water in the diisobutyl ketone more than the other al
kanols. The relative mutual solubility of methanol ana ethanol is high
er in the water layer than in the diisobutyl ketone layer. The convers
e is true for the other alkanols. Three three-parameter equations have
been fitted to points on the binodal curve. The results are compared
and discussed in terms of statistical consistency. The NRTL and UNIQUA
C models were used to correlate the experimental results and to calcul
ate the phase compositions of the ternary systems. The NRTL equation f
itted the experimental data better than did the UNIQUAC equation, and
the average root mean square deviation phase composition error was 0.0
13 for the NRTL model and 0.046 for the UNIQUAC model.