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采用自制的相平衡研究装置,测定了RbBr-CH_3OH/C_2H_5OH-H_2O和CsBr-CH_3OH/C_2H_5OH-H_2O四个三元体系在25、35、45℃三个温度下的平衡溶解度;同时得到了四个三元体系饱和溶液中不同盐浓度下的折光率数据.实验结果表明,在所有的体系中,随着甲醇或乙醇质量分数的增加,RbBr和CsBr在水中的溶解度逐渐降低;并且折光率也逐渐减小.用经验关联方程对溶解度进行了拟合,同时给出了CH_3OH和C_2H_5OH分别对RbBr和CsBr的盐析率曲线.
The equilibrium solubility of four ternary systems of RbBr-CH_3OH / C_2H_5OH-H_2O and CsBr-CH_3OH / C_2H_5OH-H_2O was measured at three temperatures of 25, 35 and 45 ℃ by using a self-made phase equilibrium apparatus. At the same time, four Refractive index data of the ternary system saturated solution at different salt concentrations.The experimental results show that in all the systems, the solubility of RbBr and CsBr in water gradually decreases with the increase of the mass fraction of methanol or ethanol, and the refractive index also gradually The solubility was fitted by the empirical correlation equation and the salting-out rate curves of RbBr and CsBr by CH_3OH and C_2H_5OH were given respectively.