Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

The solubilities of dimethyl succinylsuccinate in tetrahydrofuran, acetic ether, acetone, acetonitrile, 1-propanol, ethanol and methanol pure solvents and tetrahydrofuran + methanol mixed solvents weremeasured within the temperature range 278.15 K to 333.15 K at atmospheric pressure. The solubilityof dimethyl succinylsuccinate in those selected solvents increased with increasing temperature, and thedissolution in tetrahydrofuran is best. The semi-empirical Buchowski Ksiazczak h equation, the modi-fied Apelblat equation and CNIBS/R-K equation were used to correlate with the solubility. In pure solventsthe values of the sum of deviation ( SUM(%Dev)) for Apelblat and Buchowski Ksiazczak h equations are1.1115 and 1.0383, respectively. In the tetrahydrofuran and methanol mixture, the sums of deviation( SUM(%Dev)) for Apelblat equation, Buchowski Ksiazczak h equation and CNIBS/R-K equation are 0.7587,0.7059 and 1.4090, respectively. By comparing models, the solubilities predicted by Buchowski Ksiazczak h equation and Apelblat equation is reasonable in mixture solvent and pure solvent, respectively. Thethermodynamic properties of the solution process, including the enthalpy, and entropy were calculatedby the van t Hoff analysis. The value of enthalpy and entropy were positive.