發(fā)布時間：2018-08-07 13:02

【摘要】：采用密度-折光率聯(lián)立法研究了稀堿金屬無機鹽氯化銫在咪唑離子液體[Cnmim]Br(n=2,4,6,8)和水的混合溶劑中的溶解行為。測定了在T=(288.15,298.15和308.15)K溫度下CsCl+[Cnmim]Br(n=2,4,6,8)+H_2O三元體系不同組成比例下溶液的折光率和密度數(shù)據(jù),通過關(guān)聯(lián)密度和折光率數(shù)據(jù)獲得了CsCl維持[Cnmim]Br(n=2,4,6,8)水相的最高濃度。研究結(jié)果表明:當在[Cnmim]Br(n=2,4,6,8)水溶液中添加氯化銫,混合系統(tǒng)發(fā)生復分解反應,析出固體Cs Br。相同溫度下,飽和溶液中氯化銫的最大含量會隨著離子液體含量的增加而降低。離子液體含量相同時,混合溶液中CsCl的最高濃度隨著離子液體側(cè)鏈的增長而增加,CsCl含量順序:[C_2mim]Br[C_4mim]Br[C_6mim]Br[C_8mim]Br。同一體系中,CsCl飽和濃度隨著溫度的升高而增大。同時,采用經(jīng)驗方程對CsCl飽和濃度進行了擬合,擬合結(jié)果較好。此外還測定了飽和溶液的密度及折光率數(shù)據(jù),為描述溶液物理性質(zhì)和組分之間的關(guān)系提供基礎(chǔ)數(shù)據(jù)。
[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.
【作者單位】： 陜西國際商貿(mào)學院醫(yī)藥學院;陜西師范大學化學化工學院;
【基金】：國家自然科學基金項目(21571120,21301114) 陜西省教育廳專項科研計劃項目(16JK2036) 2016陜西省大學生創(chuàng)新創(chuàng)業(yè)訓練計劃項目(2958) 陜西國際商貿(mào)學院科研項目(SMXY201605);陜西國際商貿(mào)學院人才引進科研啟動經(jīng)費資助
【分類號】：O645.1

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