咪唑离子液体对CsCl溶解度的影响

发布时间：2018-08-07 13:02

【摘要】：采用密度-折光率联立法研究了稀碱金属无机盐氯化铯在咪唑离子液体[Cnmim]Br(n=2,4,6,8)和水的混合溶剂中的溶解行为。测定了在T=(288.15,298.15和308.15)K温度下CsCl+[Cnmim]Br(n=2,4,6,8)+H_2O三元体系不同组成比例下溶液的折光率和密度数据,通过关联密度和折光率数据获得了CsCl维持[Cnmim]Br(n=2,4,6,8)水相的最高浓度。研究结果表明:当在[Cnmim]Br(n=2,4,6,8)水溶液中添加氯化铯,混合系统发生复分解反应,析出固体Cs Br。相同温度下,饱和溶液中氯化铯的最大含量会随着离子液体含量的增加而降低。离子液体含量相同时,混合溶液中CsCl的最高浓度随着离子液体侧链的增长而增加,CsCl含量顺序:[C_2mim]Br[C_4mim]Br[C_6mim]Br[C_8mim]Br。同一体系中,CsCl饱和浓度随着温度的升高而增大。同时,采用经验方程对CsCl饱和浓度进行了拟合,拟合结果较好。此外还测定了饱和溶液的密度及折光率数据,为描述溶液物理性质和组分之间的关系提供基础数据。
[Abstract]:The dissolution behavior of the dilute alkali metal inorganic salt caesium chloride in the mixed solvent of imidazole ionic liquid [Cnmim]Br (n=2,4,6,8) and water was studied by the density refractive index coupling method. The refractive index and density data of the solution under the proportion of CsCl+[Cnmim]Br (n=2,4,6,8) +H_2O three elements at T= (288.15298.15 and 308.15) K temperature were measured. The maximum concentration of CsCl to maintain [Cnmim]Br (n=2,4,6,8) water phase is obtained by over correlation density and refractive index data. The results show that when cesium chloride is added in [Cnmim]Br (n=2,4,6,8) water solution, the complex system has a complex decomposition reaction, and the precipitation of solid Cs Br. at the same temperature, the maximum content of cesium chloride in the satiety and solution will follow the ionic liquid content. When the content of the ionic liquid is the same, the highest concentration of CsCl in the mixed solution increases with the increase of the ionic liquid side chain. The order of CsCl content is in the same system of [C_2mim]Br[C_4mim]Br[C_6mim]Br[C_8mim]Br.. The saturation concentration of CsCl increases with the increase of temperature. At the same time, the saturated concentration of CsCl is carried out by the empirical equation. The fitting results are better. In addition, the density and refractive index data of the saturated solution are also measured, which provides the basic data for describing the relationship between the physical properties of the solution and the relationship between the components.
【作者单位】：陕西国际商贸学院医药学院;陕西师范大学化学化工学院;
【基金】：国家自然科学基金项目(21571120,21301114) 陕西省教育厅专项科研计划项目(16JK2036) 2016陕西省大学生创新创业训练计划项目(2958) 陕西国际商贸学院科研项目(SMXY201605);陕西国际商贸学院人才引进科研启动经费资助
【分类号】：O645.1

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