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在301.45 K至463.15 K温度范围内测定了间苯二甲酸在水中的溶解度。所采用的实验方法是在一台50升不锈钢高压釜中使过量的溶质与水溶液达到平衡后取样滴定分析饱和液体的组成。总结了三种同分异构体苯二甲酸在水中的溶解度数据,并基于固液平衡计算关联了UNIFAC活度系数模型中组合项的分子参数。结果表明,三种同分异构体溶解度的差别可以采用UNIFAC模型中组合项中的q/r作为可调参数进行定量地关联。
The isophthalic acid solubility in water was determined over the temperature range of 301.45 K to 463.15 K. The experimental method used was a sample titration to analyze the composition of the saturated liquid after an excess of solute and aqueous solution had been equilibrated in a 50 liter stainless steel autoclave. Solubility data of three isomeric phthalic acids in water were summarized and the molecular parameters associated with the combination terms in the UNIFAC activity coefficient model were calculated based on the solid-liquid equilibrium. The results show that the differences in the solubility of the three isomers can be quantitatively correlated using q / r in the combinatorial terms of the UNIFAC model as a tunable parameter.