六水氯化镁在醇类溶剂中溶解度的测定与关联

摘要

The solubility of magnesium chloride hexahydrate in ethanol, n-propanol, isopropanol, glycerol, n-butanol,isobutanol were determined by equilibrium methods at 293.15~338.15 K.The results show that the solubility of magnesium chloride hexahydrate in six alcohol solvents increases with the increase of temperature, and its solubility in glycerol and ethanol is higher than in four other solvents. The Apelblat equation, λh equation, ideal solution equation and empirical equation were used to correlate the experimental data, and the results indicate that the solubility data can be well correlated by these four models. The Apelblat equation provides the best fitting results. The experimental data and the correlation models provide important basis for the application of magnesium chloride hexahydrate in non-aqueous systems.%使用平衡法测定了在293.15~338.15 K时,六水氯化镁在乙醇、正丙醇、异丙醇、丙三醇、正丁醇、异丁醇六种醇类有机溶剂中的溶解度.实验结果表明六水氯化镁在六种醇类有机溶剂中的溶解度均随着温度的升高而增大,且在丙三醇、乙醇中的溶解度相对较大.采用Apelblat方程、λh方程、理想状态方程和多项式经验方程分别对溶解度实验数据进行关联,关联结果良好,其中Apelblat方程拟合结果优于其他三种方程.所得实验数据和拟合模型为六水氯化镁在非水体系中的应用提供了重要依据.