Citation: Wei Xiao-Lan, Zhang Feng-Xing, Guo Zhi-Zhen, Shi Qi-Zhen. Study on the lsothermal Solubility of Quaternary Systems KCl(K2SO4)-MgCl2(MgSO4)-CO(NH2)2-H2O[J]. Acta Physico-Chimica Sinica, 1998, 14(03): 237-242. doi: 10.3866/PKU.WHXB19980309
钾镁氯化物(硫酸盐)与脲、水体系的溶度研究
报导了KCl-MgCl2-CO(NH2)2-H2O和K2SO4-MgSO4-CO（NH2）2-H2O两个四元体系在25℃时的溶度及其饱和溶液的折光率、密度，相应的溶度图和组成-折光率、组成-密度图．前一体系中形成3个三元化合物：MgCl2•4CO（NH2）2•2H2O、MgCl2•CO（NH2）2•4H2O和KCl•MgCl2•6H2O溶度盐份图由9支共饱线、4个四元无变点组成．四元体系的水量图、性质-组成图有类似的变化．后一体系中有2个异成份溶解化合物MgSO4•CO（NH2）2•2H2O和K2SO4•MgSO4•6H2O形成，溶度等温图由7支双饱溶度线、3个四元无变点组成．对两个体系相图的相似性和差异点进行了讨论．
English
Study on the lsothermal Solubility of Quaternary Systems KCl(K2SO4)-MgCl2(MgSO4)-CO(NH2)2-H2O
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.
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Key words:
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Quaternary system
- / Phase equilibirium
- / Solubility
- / Potassium chloride
- / Magnisium chloride
- / Potassium sulfate
- / Magnisium Sulfate
- / Urea
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