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The measured solubility and the density of the liquid phase for the ternary sodium 3-nitrobenzenesulphonate + sodium 4-nitrobenzenesulphonate + water system at 283.15 K, 303.15 K and 323.15 K are shown in Tables 1, 2 and 3, respectively. The ternary phase diagrams are given in Figures 1, 2 and 3. In the phase diagrams as shown in Figures 1, 2 and 3, W, M, and N represent water, sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate, respectively. E1, E2 and E3 represent the solubility of sodium 3-nitrobenzenesulphonate in water at 283.15 K, 303.15 K and 323.15 K; S1, S2 and S3 represent the solubility of sodium 4-nitrobenzenesulphonate in water at 283.15 K, 303.15 K and 323.15 K. It can be seen from Figures 1 , 2 and 3 that along the solubility curve E1C1, E2C2 or E3C3, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for the compound sodium 3-nitrobenzenesulphonate on a wet basis. Similarly, along the solubility curve S1C1, S2C2 or S3C4, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for sodium 4-nitrobenzenesulphonate. However, at 323.15 K, along the solubility curve C3C4, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for adduct of sodium 3-nitrobenzenesulphonate with sodium 4-nitrobenzenesulphonate, in which the mole ratio of the two compositions is 1:1, named as adduct A. E1C1, E2C2 and E3C3 are saturation curves corresponding to the solid-phase sodium 3-nitrobenzenesulphonate at 283.15 K, 303.15K and 323.15 K, respectively; S1C1, S2C2 and S3C4 are saturation curves corresponding to the solid-phase sodium 4-nitrobenzenesulphonate; C3C4 is saturation curves corresponding to the solid-phase of adduct A. C1 and C2 are invariant points at 283.15 K and 303.15K, which represent the cosaturated solution of the solid phases sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate. C3 is invariant point at 323.15 K, which represent the cosaturated solution of the solid phases sodium 3-nitrobenzenesulphonate and adduct A; and C4, the cosaturated solution of the solid phases sodium 4-nitrobenzenesulphonate and adduct A. |
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电分析化学
金虫 (正式写手)
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-轩影鳶: 金币+20, 翻译EPI+1, ★★★★★最佳答案 2012-04-22 18:11:29
-轩影鳶: 金币+20, 翻译EPI+1, ★★★★★最佳答案 2012-04-22 18:11:29
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3-硝基苯磺酸钠、4-硝基苯磺酸钠及水的三元体系组成的液相于283.15K,303.15K,323.15K温度下的精确溶解度与密度分别如表1、2、3所示。三相图已给出:图1、2、3。 在图1、2、3所示相图中,W,M及N分别代表水,3-硝基苯磺酸钠、4-硝基苯磺酸钠。E1 E2 E3代表3-硝基苯磺酸钠在283.15K,303.15K,323.15K时于水中的溶解度;S1 S2 S3代表4-硝基苯磺酸钠在283.15K,303.15K,323.15K时于水中的溶解度。从图1 2 3可以看出沿着E1C1 E2C2或 E3C3溶解度曲线,连接液相、半固体及延伸区间的组成点,这些连线的交点即为3-硝基苯磺酸钠处于半固相时固相的大概组成。类似地,沿着溶解度曲线S1C1 S2C2 或S3C3,连接液相、半固体及延伸区间的组成点,这些连线的交点即为4-硝基苯磺酸钠处于半固相时固相的大概组成。而在323.15K时,沿着溶解度曲线C3C4,连接液相、半固体及延伸区间的组成点,这些连线的交点即为3-硝基苯磺酸钠与4-硝基苯磺酸钠的加合物处于半固相时固相的大概组成,此时两物质摩尔比为1:1,命名为加合物A。 E1C1 E2C2 E3C3依次是3-硝基苯磺酸钠在283.15K,303.15K,323.15K时对应的饱和曲线;S1C1 S2C2 S3C4依次是4-硝基苯磺酸钠对应的饱和曲线;C3C4是固相的加合物对应的饱和曲线。C1 C2是283.15K,303.15K下的恒比点,它代表固相时3-硝基苯磺酸钠、4-硝基苯磺酸钠混合溶液。C3是323.15K下的恒比点,它代表固相时3-硝基苯磺酸钠、加合物A混合溶液;C4是固相时4-硝基苯磺酸钠、加合物A混合溶液。 |
2楼2012-04-22 15:45:51












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