高温下对苯二甲酸在醋酸-水溶液中的溶解度预测

在醋酸摩尔分数0.73,温度130～270℃的范围内利用UNIFAC模型估算了对苯二甲酸在醋酸 水溶液中的溶解度,估算值与文献值的平均相对误差7.74%,表明本文所建方法在缺乏实验数据的情况下可以用来预测高温下TA在醋酸 水溶液中的溶解度。因此,用该方法预测了130～270℃范围内60%～90%醋酸 水溶液中的TA的溶解度,给出了不同组成下的溶解度 温度图。

Solubility prediction of terephthalic acid in acetic acid solution at high temperature

UNIFAC activity coefficient model was used to estimate the solubilities of terephthalic acid in 73% acetic acid solution at 130～270 ℃. The comparison of the estimated values and those from literatures show that the UNIFAC model is practicable for the prediction of solubility of terephthalic acid in acetic acid solution. So the method was used to predict solutilities of terephthalic acid in 60%~90% acetic acid solution at 130～270 ℃ and diagrams of solubility vs temperature at various acetic acid are given.