静态平衡法测定甲基膦酸二甲庚酯在酸性溶液中的溶解度

Determination of Solubility of Di(1-Methyl-Heptyl) Methyl Phosphonate in Acidic Solution by Static Equilibrium Method

摘要: 采用静态平衡法测定了常压下在273.15~343.15 K时甲基膦酸二甲庚酯(DMHMP)在水和不同浓度硝酸溶液中的溶解度。实验数据表明：DMHMP在常压298.15 K条件下于水中的溶解度δ(DMHMP)=166.69 mg/L；随着温度升高，DMHMP在水中的溶解度δ逐渐增加，符合Apelblat溶解度模型；用正十二烷稀释DMHMP可以降低其在水相中的溶解度；随着硝酸浓度的增加，DMHMP在硝酸中的溶解度也随之增加。

Abstract: The solubility of di(1-methyl-heptyl) methyl phosphonate in water and different concentrations of nitric acid solution was measured with static equilibrium method at 273.15-343.15 K under atmospheric pressure. The results show that the solubility of DMHMP in water is 166.69 mg/L at 298.15 K under atmospheric pressure. The solubility of DMHMP in water increases with the increase of the temperature, the experimental data are correlated with Apelblat equation. The solubility of DMHMP in water reduces with the dilution of n-dodecane. The solubility of DMHMP in nitric acid solution increases with the increase of the concentration of nitric acid.