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文献中未见ＭＣｌ－ＨＣｌ－Ｈ２Ｏ（Ｍ＝Ｌｉ、Ｎａ、Ｋ、Ｒｂ、Ｃｓ）三元体系２５℃时在ＨＣｌ全浓度范围内溶解度预测的报道。本文报道应用Ｐｉｔｚｅｒ的离子相互作用模型，系统地对０．１～１６．０ｍｏｌ·ｋｇ－１浓度范围内ＨＣｌ的活度系数和渗透系数值进行最小二乘法拟合，得到一套优于文献上报道的作用参数。用这一套参数和本文报道中五个三元体系得到的θｍｎ和φｍｎｘ，对溶解度预测获得满意结果。本方法可以推广到其它任何温度时、甚至相关四元和五元体系的溶解度预测，可以减少繁琐的实验测定，并对于利用ＨＣｌ从盐卤中盐析分离ＬｉＣｌ、ＲｂＣｌ和ＣｓＣｌ的相化学工艺计算具有实际意义
No literature predictions of the solubility of the MCl-HCl-H2O (M = Li, Na, K, Rb, Cs) ternary system at 25 ° C over the full range of HCl concentrations have been reported. In this paper, Pitzer’s ion-interaction model was used to systematically fit the activity coefficient and permeability coefficient of HCl in the concentration range of 0.1 ~ 16.0 mol · kg-1 by least square method. Reported the role of parameters. Using this set of parameters and the θmn and φmnx obtained from the five ternary systems reported in this paper, satisfactory results were obtained for the prediction of solubility. This method can be extended to predict the solubility of any quaternary or quaternary system even at any other temperature, and can reduce cumbersome experimental determination. For the phase chemical process of separating LiCl, RbCl and CsCl from salt brine by HCl, Practical significance