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Study on the Ternary Systems MgSO_4-CH_3CONHCONH_2-H_2O and Mg(NO_3)_2-CH_3CONHCONH_2-H_2O

Cui Bin; Zhang FongxingZhang Jun; Zhong Jianhua; Guo Zhizhen(Department of Chemistry, Northwestern University, Xi'an 710069)  
The solubilities and refractive indices of saturated solution of the systems MgSO4-CH3CONHCONH2-H2O(Ⅰ) and Mg(NO3)2-CH3CONHCONH2-H2O(Ⅱ) at 30℃ have been investigated. The System(Ⅰ) or (Ⅱ) are simple eutonic type, their solubility curve and refractiv index curve are consisting of two branches, corresponding to the hydrate salt [MgSO4·7H2O(Ⅰ) and Mg(NO3)2·6H2O(Ⅱ)] and CH3CONHCONH2; the composistions of the eutonic points are: MgSO4 27. 35%, CH3CONHCONH2 4. 70%(Ⅰ); Mg(NO3)2 42. 75%, CH3CONHCONH2 12. 24%(Ⅰ). This work is ofinterest for developing controlled release fertilizers.
【Fund】: 陕西省教育委员会专项科研基金
【CateGory Index】: TS311
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