三元体系CH_2OHCH_2OH+NaNO_3/KNO_3+H_2O在15℃和25℃下的溶解度、密度和折光率研究  

Solubility,density,and refractive index for the ternary system CH_2OHCH_2OH+NaNO_3/KNO_3+H_2O at 15℃ and 25℃

作　　者：张晖英[1] 李淑妮[1] 翟全国[1] 蒋育澄[1] 胡满成[1] 

机构地区：[1]陕西师范大学化学化工学院,陕西省大分子科学重点实验室,陕西西安710062

出　　处：《广西大学学报（自然科学版）》2013年第3期507-514,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21171111);广西自然科学基金资助项目(GXNSF74114);广西高校科学技术研究(201106LX609)

摘　　要：为研究有机溶剂乙二醇(CH2OHCH2OH)的加入对NaNO3和KNO3在H2O中溶液性质的影响,采用自制的相平衡研究装置,用密度-折光率联合的方法,测定了NaNO3和KNO3在CH2OHCH2OH+H2O混合溶剂中在15℃和25℃下的平衡溶解度、密度和折光率。结果表明,在所有饱和体系中,随着乙二醇质量百分含量的增加,盐在混合溶剂中的溶解度和密度降低,而折光率却逐渐增大。不饱和体系中密度和折光率都随着盐含量增加而增加,随着醇比例的增加而上升。用不同的经验关联方程分别对所有饱和体系和不饱和体系的溶解度、折光率及密度数据进行了拟合,获得了较为理想的拟合结果。研究结果提供了碱金属盐在混合溶剂中的热力学数据,为相关溶液化学研究奠定了基础。To study the effect of ethylene glycol addition on the properties of the ternary system CH2OHCH20H ＋ NaNO3/KNO3 ＋ H20, the solubilities, densities, and refractive indices were measured at 15℃ and 25℃ by the density-refractive index method using a self-made microdevice for phase equilibrium studies. In all cases, the solubilities and the densities of the solution decreased with increasing the content of ethylene glycol in the system. However, the refractive indices increased with the increase in ethylene glycol concentration in the solution. The experimental data were correlated using the related empirical equation. On the basis of the standard deviations, it can be concluded that the empirical equations could be satisfactorily used to correlate the solubility, density, and refractive index data of the investigated data of alkali nitrates in the mixed solvents, and chemistry. systems. The results provide the thermodynamics lay the foundation for the related study of solution

关 键 词：NaNO3 KNO3 乙二醇 溶解度 密度 折光率 

分 类 号：O616[理学—无机化学]