Determination and correlation of solubility of bisphenol A type phthalimide in several solvents
The solubility of bisphenol A type phthalimide in different solvents at273.15～353.15 K was measured by equilibrium method.The results show that within a certain temperature range,the solubility increases with the increase of temperature.Through the improved Apelblat equation,λh equation and Wil-son activity coefficient equation,the experimental data of the solubility was correlated.And the correlation coefficients were not less than 0.988 0,0.977 1,and 0.939 4,respectively.The three models can corre-late the solubility data of imide in solvent better.Compared with the correlation results of the model,the improved Apelblat equation has the best correlation effect(ARD≤6.18%,RSMD≤2.39,and R2≥0.988 0),providing thermodynamics basis for the design of crystallization process.
phthalimiderecrystallizationsolubilitymodel association
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