LiBr在丙酮与水的混合溶剂中溶解度的测定与关联

摘要

使用静态法常压下分别测定了LiBr在不同质量百分比的丙酮与水的混合溶剂(水的质量分数为10％ ～40％)中293.15 ～323.15 K范围内的溶解度,并利用LIFAC模型及其参数推算了活度系数及溶解度,计算值与试验值的总平均绝对偏差和总平均相对偏差百分比分别是0.054 0和0.731 3％.结果表明,LIFAC模型可以用来预测LiBr在丙酮与水的混合溶剂中的溶解度.%The solubility of lithium bromide in mixed solvents of acetone-water ( 10% —40% mass ratio of water) was determined at the temperature between 293. 15 K and 323. 15 K under atmospheric pressure using a static analytical method. The solubilities of LiBr in mixed water-acetone solutions were correlated with the LIFAC model. Interaction parameters were obtained from the correlation. The average relative deviations and average absolute deviations of the calculated values from the experimental data for this system were 0. 054 0 and 0. 731 3% , respectively . The results show that the LIFAC model can be used to predict solubility of acetone + water + lithium bromide.