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La（NO₃）₃-CH₃CONHCONH₂-H₂O相平衡的研究

STUDY ON THE TERNARY SYSTEM OF La（NO₃）₃-CH₃CONHCONH₂-H₂O

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【Author】 CHEN Qiang 1,CAO Li yun 2,XI Chen 3 (1.Dept. of Chemical Engineering, Baoji Coll. Arts & Sci., Baoji, Shaanxi 721007, China; 2.Dept. of Chemical Engineering, Northwest University of Light Industry, Xianyang, Shaanxi 712081, China; 3.Dept. of Chemistr

【机构】宝鸡文理学院化学化工系；西北轻工业学院化工系；山西师范大学化学系陕西宝鸡721007；陕西咸阳712081；山西临汾041000；

【摘要】研究了 L a( NO3 ) 3 -CH3 CONHCONH2 -H2 O三元体系在 3 0℃时的相平衡 ,测定了其饱和溶液的溶解度及折光指数 ,绘制了相应的溶解度图和折光指数—组成关系曲线。La( NO3 ) 3 体系溶解度曲线及折光指数曲线由 3支组成 ,分别与 L a( NO3 ) 3 · 6H2 O、La( NO3 ) 3 · 3 H2 O和 CH3 CONHCONH2 相对应。三元体系两个共饱和点的组成分别为 :La( NO3 ) 3 58.3 4% ,CH3 CONHCONH2 1 6. 53 %和 La ( NO3 ) 3 58. 3 1 % ,CH3 CONHCONH2 4.52 %。相平衡的数据可以用来合成缓释肥料更多还原

【Abstract】 The solubilities and refractive indices of saturated solution of the title systems at 30℃ have been studied and the corresponding equilibrum diagrams were constructed. The solubility curves and refractiv index curves of La(NO 3) 3 system consist of three branches, corresponding to La(NO 3) 3·6H 2O,La(NO 3) 3·3H 2O and CH 3NHCONH 2. The two eutectic compositions are: La(NO 3) 3 58.34%, CH 3CONHCONH 2 16.53% and La(NO 3) 3 58.31%, CH 3CONHCONH 2 4.52%. The phase equilbrium data can be used in formulating controlled release fertilizers.更多还原