Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The solid-liquid equilibrium (SLE) of glutaric anhydride in three pure solvents of tetrachloride, acetic acid and ethanoic anhydride, three binary solvents of acetic acid + tetrachloride, ethanoic anhydride + (tetrachloride / acetic acid) and a ternary solvents of tetrachloride + acetic acid + ethanoic anhydride solvent systems were measured by dynamic method at a temperature range from 278.45 to 324.45 K under atmospheric pressure. It turns out that the solubility of glutaric anhydride increases with the temperature increasing in all selected solvents. Moreover, it is interesting that the solubility of glutaric anhydride in two binary solvents (acetic acid + tetrachloride, ethanoic anhydride + tetrachloride) and ternary solvents mixtures (tetrachloride + acetic acid + ethanoic anhydride) performed a greater effect with the decrease of mass fraction of tetrachloride at a given temperature. The mass fraction of ethanoic anhydride added had a smaller effect on the solubility of glutaric anhydride in the binary solvent of ethanoic anhydride + acetic acid at T= (279.45 to 314.45)K. The experimental data of solubility were correlated by the h equation, the Apelblat equation and NRTL equation. All equation can be well applied and the relative average deviation of Apelblat equation is less than 0.05.In addition, the thermodynamic properties ofthe mixing processes in all selected solvents were calculated and discussed based on the NRTL model.