四元体系LiCl-KCl-MgCl_(2)-H_(2)O 25℃时等温研究

Studies on the Quaternary System LiCl-KCl-MgCl_(2)-H_(2)O at 25℃

本文首次报道了四元体系LiCl-KCl-MgCl_(2)-H_(2)O 25℃时的溶度和饱和溶液的折光率、密度和粘度值。并给出了体系的相图、溶度面、总氯量面及上述物理性质面。

The solubilities and the refraction indices,densities and viscosities of the saturated solutions in the title quaternary system have been investigated for the iirst time at 25℃.In the phase diagram there are five crystallization fields corresponding to LiCl·H_(2)O,KCl,MgCl_(2)·6H_(2)O,LiCl·MgCl_(2)·7H_(2)O and KCl·MgCl_(2)·CH_(2)O,respectively.The compositions of the three invariant points are LiCl:44.08,KCl:3.51,MgCl_(2):0.65%Wt.(corresponding to KCl+LiCl·H_(2)O+KCl·MgCl_(2)·6H_(2)O);40.23,0.62,5.40(LiCl·H_(2)O+KCl·MgCl_(2)·6H_(2)O+LiCl·MgCl_(2)·7H_(2)O)and 26.97,0.15,14.62(MgCl_(2)·6H_(2)O+KCl·MgCl_(2)·6H_(2)O+LiCl·MgCl_(2)·7H_(2)O).By using the measured values of the refraction index,density,viscosity,water and chloride ion-content of the saturated solutions of the system,the isograms of these properties are drawn.The iso-density curves intersect with that of the other properties except water-content in a good net form,which may be applied to monitor the isothermal evaporation process of the system quantitatively.