The measurement of solubility of diphenyl sulfoxide in ethanol

ethyl acetate

toluene

acetone

chloroform and a series of different concentrations of ethanol-water binary solvent mixtures was conducted experimentally from 288.30-334.32 K under atmospheric pressure with the synthetic method. The data showed that the solubility in the above five pure solvents is in the order:chloroform > acetone > toluene > ethyl acetate > ethanol at the desired temperatures. The solubility in ethanol-water binary solvent mixtures increased rapidly with the increase of ethanol concentration. Further

the dissolution process was an endothermic entropy-increasing process and the enthalpy change played a major influence to the Gibbs energy change. Moreover

the solubility of diphenyl sulfoxide in the selected solvent decreased with the increase of the Gibbs energy change. The data was correlated by the modified Apelblat equation and van't Hoff equation. Besides

the values of solubility in ethanol-water binary solvent mixtures were fitted by Jouban-Acree equation. The fitting results agreed well with the data. The solid-liquid equilibrium data provides suitable solvents for the synthesis and purification of diphenyl sulfoxide.