Liquid-liquid equilibria of ternary mixtures of methanol plus MEG plus n-C5, ethanol + MEG plus n-C5, and n-butanol plus MEG plus n-C5

New liquid-liquid equilibrium data of ternary systems of mono ethylene glycol + n-pentane + methanol, mono-ethylene glycol (MEG) + n-pentane + ethanol, and mono ethylene glycol + n-pentane + n-butanol from 283.15 to 293 K are presented in this work. Binodal curves were obtained by the cloud point titration method. Tie-line compositions were obtained through density and sound velocity measurements of phases in equilibrium. Results show that the solubility increases with temperature in all systems and decreases as the alcohol chain increases. The relative solubility data indicate that the alcohols are more soluble in MEG than in n-C5. The obtained experimental data were successfully correlated using the CPA and the PC-SAFT equation with appropriate binary interaction parameters.

Automated summary

New liquid-liquid equilibrium data of ternary systems of mono ethylene glycol + n-pentane + methanol, mono-ethylene glycol (MEG) + n-pentane + ethanol, and mono ethylene glycol + n-pentane + n-butanol were determined. The solubility of alcohols in the mixtures was found to increase with temperature and decrease with increasing alcohol chain length. The obtained experimental data were successfully correlated using the CPA and the PC-SAFT equation with appropriate binary interaction parameters.