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The solubilities of succinic acid, glutaric acid and adipic acid in propionic acid + water solvent mixtures at 304.25–354.65 K, and in propionic acid + ε-caprolactone + water solvent mixtures at 297.65–351.25 K were determined by the synthetic method at atmospheric pressure. The experimental data in propionic acid + water solvent mixtures were correlated by the modified Apelblat equation and modified nonrandom two-liquid (NRTL) activity coefficient model. The results showed that the calculated solubility data by the modified NRTL models had a better agreement with the experimental data, and the value of average relative deviation was 1.923%. And the solubilities of succinic acid, glutaric acid and adipic acid in ternary propionic acid + ε-caprolactone + water solvent mixtures predicted by the modified NRTL model agree with the experimentally determined results satisfactorily, which showed that the modified NRTL model would be suitable model for predicting the solubilities of succinic acid, glutaric acid and adipic acid in propionic acid + ε-caprolactone + water. Furthermore, the thermodynamic functions including dissolution enthalpy, entropy and Gibbs energy were obtained from the solubility data by using the van't Hoff equation. • The solubilities of adipic acid, glutaric acid and succinic acid were measured. • The determined solubilities were correlated by two thermodynamic models. • Thermodynamic properties of adipic acid, glutaric acid and succinic acid were calculated. [ABSTRACT FROM AUTHOR]

Graphical abstract In this study, the solubility of dibenzothiophene (DBT) in N,N-dimethylformamide, 2-(2-butoxyethoxy)ethanol, n -propanol, n -octane, diethylene glycol, decahydronaphthalene, sulfolane, dimethyl sulfoxide and acetone, were measured by using the method of dynamic laser at atmospheric pressure. The experimental temperature ranged from 282.75 to 341.15 K. The measured data showed that within the temperature range studied, the solubility of DBT increased with increasing temperature. The experimental data were correlated by the Apelblat model, λh model and the modified nonrandom two liquid (NRTL) activity coefficient model, and the calculated solubility agree satisfactorily with the measured results. The result of Akaike Information Criterion (AIC) analysis showed that the Apelblat model was the best model to correlate the solubility of DBT in diethylene glycol, n -octane, sulfolane and decahydronaphthalene, the λh model was the best model to correlate the solubility of DBT in 2-(2-butoxyethoxy)ethanol and the modified NRTL model was the best model to correlate the solubility of DBT in N,N-dimethylformamide, acetone, dimethyl sulfoxide and n -propanol. Furthermore, the thermodynamic functions including dissolution enthalpy, entropy and Gibbs energy were obtained from the solubility data by using the van't Hoff equation. Highlights • The solubility of dibenzothiophene in nine pure solvents were determined. • The determined solubility data were correlated by three thermodynamic models. • Thermodynamic properties of dibenzothiophene were calculated and discussed. Abstract In this study, the solubility of dibenzothiophene (DBT) in N,N-dimethylformamide, 2-(2-butoxyethoxy)ethanol, n -propanol, n -octane, diethylene glycol, decahydronaphthalene, sulfolane, dimethyl sulfoxide and acetone, were measured by using the method of dynamic laser at atmospheric pressure. The experimental temperature ranged from 282.75 K to 341.15 K. The results show that within the temperature range studied, the solubility of DBT increased with increasing temperature. The experimental data were correlated by the Apelblat model, λh model and the modified non-random two liquid (NRTL) activity coefficient model, and the calculated solubility agree satisfactorily with the measured results. The result of Akaike Information Criterion (AIC) analysis showed that the Apelblat model was the best model to correlate the solubility of DBT in diethylene glycol, n -octane, sulfolane and decahydronaphthalene, the λh model was the best model to correlate the solubility of DBT in 2-(2-butoxyethoxy)ethanol and the modified NRTL model was the best model to correlate the solubility of DBT in N,N-dimethylformamide, acetone, dimethyl sulfoxide and n -propanol. Furthermore, the thermodynamic functions including dissolution enthalpy, entropy and Gibbs energy were obtained from the solubility data by using the van't Hoff equation. [ABSTRACT FROM AUTHOR]