The solubility of thiourea in triethylene glycol was determined in the temperature range of 318.35–357.75 K. The experimental data were approximated by the modified Apelblat equation. The dissolution enthalpy and dissolution entropy were calculated from the experimental data. The mutual interactions between solvent and solute were discussed in brief. The obtained data may be useful for development of the processes involving thiourea.

The solubilities of thiourea in methanol-water mixtures with mass fraction of methanol of 0.54, 0.65, 0.76, 0.88, and 1.00 were determined. The experimental data were approximated with the modified Apelblat equation. The dissolution enthalpy and entropy were calculated from the experimental data and the nature of interactions between the solvent and solute were discussed. The obtained solubility data can be used for development of various technological processes involving thiourea, particularly for the synthesis of isopropyl mercaptan.

The solubility of sulfur dioxide in N,N-dimethylformamide, dimethyl sulfoxide, N,N-dimethylacetamide, sulfolane, tributyl phosphate, and diethanolamine was measured in temperature range 295.15–323.15 K. Dissolution enthalpy and entropy were calculated from the solubility data. The interactions between solute and solvent are discussed. The obtained data are helpful for the development of sulfur dioxide removal technologies.

Based on the solubilities of pimelic acid in ionic liquids [EMIM][HSO4], [PMIM]Br, [i-PMIM][HSO4], [BMIM]Br, and [BMIM][HSO4], dissolution enthalpy and dissolution entropy at different temperatures have been calculated. The experimental data of solubilities are correlated with the modified Apelblat equation. The thermodynamic properties of pimelic acid in ionic liquids were discussed. The solubilities correlated by the model are in good agreement with experimental data.

The solubilities of KF in tributyl phosphate, dimethyl sulfoxide, N,N-dimethylacetamide and 1,4-dioxane had been determined using a dynamic method at temperatures ranging from 300.87 to 359.50 K. The experimental data were correlated with the modified Apelblat equation. It provided the basic data for preparation of 2,3,4,5-tetrafluorobenzoic acid.Highlights► The solubilities of KF in the non-proton polar solvents were determined. ► The experimental data were correlated with the modified Apelblat equation. ► The interactions between solute and solvent were discussed.

Soybean residue is a rich byproduct that is discarded in soybean processing factories. In this research, soybean residue was used to prepare highly valued genistein by separation and purification through the combination of isoelectric point precipitation, centrifugation, solvent extraction, and macroporous resin adsorption. The purification process had been studied in detail. The results showed that AB-8 resin, feathering high adsorption and desorption recovery, is a suitable resin for purifying genistein, and a optimized process for gradient elution was obtained: the extracts was sequentially eluted with deionized water, 20% ethanol, and 70% ethanol in the first process, and with 40% ethanol and 70% ethanol in the second process; the purity of genistein was about 90% by high-performance liquid chromatography (HPLC) analysis.

The solubilities of potassium fluoride (KF) in the different nonproton polar solvents N,N-dimethyl ethanolamine, pyridine, diethanolamine, and sulfolane have been determined using a dynamic method at temperatures ranging from 308.73 to 367.37 K. The experimental data were correlated with the modified Apelblat equation, and the solubilities correlated by the Apelblat model showed good agreement with the experimental data. It provided the basic data for preparation of 2,3,4,5-tetrafluorobenzoic acid.

The solubilities of KF in seven polar solvents had been determined in the temperature range from 300.87 to 360.85 K by a dynamic method. The experimental data were correlated with the λh equation. The obtained data are useful for the preparation of 2,3,4,5-tetrafluorobenzoic acid technology.

The solubilities of potassium fluoride (KF) in tributyl phosphate, dimethyl sulfoxide, N,N-dimethylacetamide and 1,4-dioxane were determined, the experimental data were correlated with the modified Apelblat equation. The dissolution enthalpy and entropy had been calculated from the solubility data. The interactions between solute and solvent were discussed. The obtained data are basic for preparation of 2,3,4,5-tetrafluorobenzoic acid process.

The densities and viscosities of pure 1,7-dibromoheptane and 1,7-dibromoheptane in ethanol had been determined in a range from 288.15 to 323.15 K. The relative viscosities were correlated using the extended Jones-Dole equation. The results showed that the model agreed very well with the experimental data.

The densities and viscosities of 11α-hydroxy-16α,17α-epoxyprogesterone (HEPG) in chloroform were determined from 287.65 to 321.15 K. The viscosities were correlated using the Vogel-Tamman-Fulcher (VTF) equation, a good accuracy of the correlation being obtained.

The solubilities of pimelic acid in ionic liquids [EMIM][HSO4], [PMIM]Br, [i-PMIM][HSO4], [BMIM]Br, and[BMIM][HSO4] are determined with the suitable experimental methods and apparatus. The experimental data of solubilities are correlated with the Apelblat equation. The solubilities correlated by the model are in good agreement with experimental data.

The solubilities of 11α-hydroxy-16α,17α-epoxyprogesterone and 16α,17α-epoxyprogesterone in isopropanol, n-propanol, DMSO, dioxane, and 1-butanol have been determined. A solubility model is proposed, and the solubilities calculated by the model show good agreement with experimental data.

The solubility of NaHS in different solvents had been determined from 297.85 to 342.55 K by an analytical method. A solubility model is proposed and the solubilities calculated by the model show good agreement with experimental data. It provided the basic data for the synthesis of isopropyl mercaptan in industry.

Thermodynamic properties such as enthalpy of solution for thiourea in trigiycol and water were determined. Measurements were made at 293.15 K and molalities of solute for different solvents in the range of m = 0.106 to 0.213 mol kg−1, making use of a precise isoperibol ampoule-type calorimeter. It was concluded that the solvent proton-donor ability and existing steric hindrances for hydrogen bonding and other intermolecular interactions play a key role in the solvation of thiourea.

The densities and viscosities of thiourea in triglycol + water had been determined from 302.85 to 341.45 K. The viscosities were correlated using the VTF equation. The results showed that the model agree very well with the experimental data.

The densities and viscosities of 2-bromopropane + ethanol binary mixtures had been determined using an digital vibrating U-tube densimeter and Ubbelohde capillary viscometer respectively from (298.15 to 318.15) K. The dependence of densities and viscosities on temperature and concentration had been correlated. The excess molar volume of the binary system was calculated from the experimental density data. The excess molar volumes were related to compositions by polynomial regression and regression parameters, and total rmsd deviations were obtained. The results showed that the model agreed very well with the experimental data.

The solubilities of pimelic acid in ether, tetrahydrofuran, ethanol, and methanol had been determined by the synthetic method. The experimental data were correlated with simplified Apelblat equation. The solubilities correlated by the model showed good agreement with experimental data.

The densities and viscosities of thiourea in triglycol + water had been determined at temperatures from (302.85 to 341.45) K. The relative viscosities were correlated using the extended Jones−Dole equation equation. The results showed that the model agreed very well with the experimental data.

The solubility of thiourea in triglycol + water had been determined from (292.05 to 357.75) K by the synthetic method. The experimental data were correlated with the modified Apelblat equation.

The solubilities of thiourea in ethanol or methanol + water from (289.75 to 330.85) K and the enthalpies of solution of thiourea in methanol, ethanol, or water had been determined with the suitable experimental methods and apparatus. The experimental data of solubilities were correlated with the modified Apelblat equation. The solubilities correlated by the model show good agreement with experimental data. The enthalpies of solution for thiourea in methanol, ethanol, or water were also determined. It was concluded that the solvent proton-donor ability and existing steric hindrances for hydrogen bonding and other intermolecular interactions play a decisive role in the solvation of thiourea.

The solubility of 2-bromopropane and thiourea in water had been determined from (295.25 to 354.75) K by analytical and synthetic methods, respectively. The experimental data were correlated with the modified Apelblat equation and quadratic equation separately. The solubilities correlated by the model show good agreement with experimental data.