The solubilities of 4,4'-dimethylbenzophenone(4,4'-DMBP)in 10 single organic solvents and 1 binary organic solvent(ethanol+ethyl acetate)were determined by a static equilibrium method at 293.15-333.15 K under atmospheric pressure.The solubility of 4,4'-DMBP and temperature were correlated by activity coefficient models(Wilson equation and NRTL equation)and empirical models(Apelblat equation and Van't Hoff equa-tion),and the corresponding model parameters were obtained.The results showed that the order of solubility of 4,4'-DMBP in single solvents at room temperature(298.15 K)was as follows:benzene＞propyl acetate＞ethyl acetate＞methyl acetate＞1-butanol＞2-butanol＞1-propanol＞2-propanol＞ethanol＞methanol.The binary sol-vent of ethanol and ethyl acetate had no solubilization and desolvation effect on 4,4'-DMBP.The fitting effect of the Wilson model in single solvents was the best,with a relative standard deviation(ARD)of 1.13％,and a root mean square deviation(RMSD)of 0.19％.Analysis of solvation effects and preferential solvation effects showed that the contributions of π*and VSδH2/(100RT)to the solubility were 46.43％and 46.38％,respectively,confirming that their contribution to the solubility of 4,4'-DMBP was dominant.In the binary solvent of ethanol and ethyl acetate,when the ethanol content is high,4,4'-DMBP is preferentially solvated by ethyl acetate.
关键词
4,4'-二甲基二苯甲酮/溶解度/热力学模型
Key words
4,4'-dimethylbenzophenone/solubility/thermodynamic model
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