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对KCl,H_2O和酰胺溶剂构成的三元体系,文献中仅有体系KCl-H_2O-FA(甲酰胺)的研究报道,尚未见到KCl-H_2O-DMA(N,N-二甲基乙酰胺)和KCl-H_2O-DMF(N,N-二甲基甲酰胺)的相平衡研究。本文研究了上述两个体系在25℃时的溶度,考查了混合溶剂中酰胺含量对KCl溶度的影响,讨论了KCl对H_2O-酰胺溶剂缔合状态和物理化学性质的影响。同时为在混合溶剂中综合利用钾盐积累一些数据,为进一步研究含KCl的四元体系打下基础。
For the ternary system consisting of KCl, H 2 O and amide solvents, only KCl-H 2 O-FA (formamide) has been reported in the literature, and no KCl-H 2 O-DMA (N, N-dimethylacetamide) And KCl-H 2 O-DMF (N, N-dimethylformamide) phase equilibrium study. In this paper, the solubility of these two systems at 25 ℃ was investigated. The effect of amide content in KCl solution on the solubility of KCl was investigated. The effect of KCl on the association and physicochemical properties of H_2O-amide solvent was discussed. At the same time, some data were accumulated for comprehensive utilization of potassium salt in mixed solvents, which laid the foundation for further study of quaternary system containing KCl.