Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (03): 237-242.doi: 10.3866/PKU.WHXB19980309

• ARTICLE • Previous Articles     Next Articles

Study on the lsothermal Solubility of Quaternary Systems KCl(K2SO4)-MgCl2(MgSO4)-CO(NH2)2-H2O

Wei Xiao-Lan, Zhang Feng-Xing, Guo Zhi-Zhen, Shi Qi-Zhen   

  1. Department of Chemistry Nothwest University,Xi'an 710069
  • Received:1997-06-10 Revised:1997-10-20 Published:1998-03-15
  • Contact: Zhang Feng-Xng


The solubilities refraction indices and densities of the saturated solutions of the titled quaternary systems at 25 ℃ have been investigated for the first time and thier solubility diagrams, property diagrams hare been constructed.
In the solubility diagrams, there are five crystallization regions corresponding to KCl,MgCl2-6H2O, CO(NH2)2, MgCl2.4CO(NH2)2-2HaO and MgCl2•CO(NH2)2•4H2O, respectively for KCl-MgCl2-CO(NH2)2-H2O system, four crystallization regions corresponding t0 K2SO4,MgSO4•7H2O, CO(NH2)2 and K2SO4.MgSO4•6H2O, respectively for system K2SO4-MgSO4-CO(NH2 )2-H2 O system.

Key words: Quaternary system, Phase equilibirium, Solubility, Potassium chloride, Magnisium chloride, Potassium sulfate, Magnisium Sulfate, Urea