| 三元体系MgSO4-CO(NH2)2-H2O在25℃时的等温溶度研究 |
| A STUDY ON THE ISOTHERMAL SOLUBILITY OF MgSO4-CO(NH2)2-H2O TERNARY SYSTEM AT 25℃ |
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| 摘要: 本文报道了三元体系MgSO4-CO(NH2)2-H2O在25℃时的等温溶度及其饱和溶液的折光率、密度值测定结果，绘制出相应的溶度图和组成-折光率、组成-密度图。该三元体系内形成一个组成为MgSO4·CO(NH2)2·2H2O的新相，该相具异成份溶解性，存在区域为：MgSO4 28.78-22.62%；CO(NH2)2 30.71-50.80%。对此新相进行了热分析、红外光谱及X-射线粉末衍射分析等表征。 |
| 关键词: 三元体系 相平衡 溶解度 硫酸镁 脲 |
| 基金项目: |
| Abstract: MgSO4-CO(NH2)2-H2O ternary system, as a boundary ternary system of quaternary system K2SO4-MgSO4-CO(NH2)2-H2O, has been investigated by isothermal method at 25℃. Its phase diagram and properties (refraction indices and densities)-composition diagrams have been constructed. There is a new ternary solid phase being formed, MgSO4·CO(NH2)2·2H2O, which is incongruently. The compositions of the two eutonic points are 28.78, 22.62 %wt. for MgSO4; 30.71, 50.80 %wt. for CO(NH2)2. The compound has been studied by IR, TGA and X-ray diffraction. |
| Keywords: ternary system phase diagram solubility magnesium sulfate urea |
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| 张逢星,魏小兰,郭志箴,史启祯.三元体系MgSO4-CO(NH2)2-H2O在25℃时的等温溶度研究[J].无机化学学报,1997,13(4):375-379. |
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