Measurement and Correlation for Solubilities of Adipic Acid, Glutaric Acid, and Succinic Acid in Dimethyl Adipate + Methanol Mixtures

Abstract

The solubilities of adipic acid, glutaric acid, and succinic acid in dimethyl adipate + methanol solvent mixtures were measured by the method of dynamic laser under 101.3 kPa. The mass fraction of dimethyl adipate in the solvent mixtures ranged from 0.0 to 1.0, and the temperature ranged from 283.95 to 328.15 K. It was found that with the increase of mass fraction for dimethyl adipate in mixed solvents, the measured solubilities of adipic acid, glutaric acid, and succinic acid would decrease at the same temperature, and with the gradually increase of temperature the measured solubilities of adipic acid, glutaric acid, and succinic acid would increase at the constant proportion solvent mixtures. The experimental data were correlated by the Apelblat model, λh model, and the modified nonrandom two liquid activity coefficient model. Results showed that the largest values of relative average deviation and root-mean-square deviations obtained by the three models were 4.49% and 0.35%, respectively. The three models were proven to give a good representation of the experimental solubilities results. The result of Akaike Information Criterion (AIC) analysis shows that the Apelblat model is the best model to correlate the solubilities of adipic acid and succinic acid and the λh model is the best model to correlate the solubilities of glutaric acid in dimethyl adipate + methanol mixed solvent.

Solubilities of Adipic Acid, Glutaric Acid, and Succinic Acid in Dimethyl Glutarate + Methanol Mixtures: Experimental Measurement and Thermodynamic Modeling

“…Solubility of AA in methanol + dimethyl glutarate mixtures; ●, experimental solubility; △, solubility data from Xie; ▽, solubility data from Gaivoronskii; (), solubility data correlated by the modified Apelblat model; (−–−), solubility data correlated by the modified λ h model; (---), solubility data correlated by modified NRTL model.…”

“…When the solute particle disappeared exactly, the intensities of the transmitted laser would reach the maximum value. We recorded the temperature at that time as the temperature of the solid–liquid equilibrium (SLE) point, and there are detailed descriptions in our previous works. ,,, …”

“…According to the literature, the solid−liquid equilibrium data of AA (GA, SA) in DMA + methanol has been measured. 8 Some solubilities of AA (GA, SA) in other solvent mixtures or pure solvent have been also reported. The solubility of SA in acetic acid + ε-caprolactone solvent mixtures, 9 cyclohexanone + ε-caprolactone solvent mixtures, 9 diethylene glycol + urea solvent mixtures, 10 ethanol + water solvent mixtures, 11 ethanol + AA solvent mixtures, 12 acetone + GA + AA solvent mixtures, 13 cyclohexanone + acetic acid solvent mixtures, 14 methanol + water, ethanol + water, and binary aqueous ethanol solvents 15 has been measured.…”

“…According to the literature, the solid–liquid equilibrium data of AA (GA, SA) in DMA + methanol has been measured . Some solubilities of AA (GA, SA) in other solvent mixtures or pure solvent have been also reported.…”

Measurement and Correlation of Solubilities of 4-Methylbenzoic Acid and Terephthalic Acid in Eight Organic Solvents

“…The measurement of solubility was carried out by the laser dynamic method, which was described in detail in the literature. − …”