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Ternary liquid equilibria. IV. Various systems

1957; Wiley; Volume: 7; Issue: 12 Linguagem: Inglês

10.1002/jctb.5010071204

1934-998X

Madhumati Rao, C. Venkata Rao,

Thermodynamic properties of mixtures

Abstract Phase equilibrium data are presented for the ternary liquid systems, namely, acetic acid‐water‐hexane, ethylene glycol‐water‐ n ‐butanol, ethylene glycol‐water‐ethyl methyl ketone, and ethyl methyl ketone‐water‐ cyclo hexane. The tie‐line data for all the systems have been analysed by the methods of correlation of Othmer & Tobias and Hand, and fitted reasonably with the respective plots. For the system acetic acid‐water‐hexane, the tie‐lines, when produced beyond the binodal curve, meet at a point on the extended base line of the ternary equilibrium diagram and this facilitates the interpolation and extrapolation of the tie‐line data. A comparison of the present data for glycol‐water systems with the literature data for the corresponding systems containing n ‐pentanol and n ‐hexanol respectively as solvents, has confirmed earlier conclusions, namely, that for any solute‐water combination, when the solvent is changed in a homologous series in the order of increasing molecular weight, the area of heterogeneity increases, and the solute favours the aqueous phase more and more.