Studies on the Isothermal Solubility and the New Phases in the Ternary System MgCl2 CO(NH2)2 H2O at 25 ℃

Abstract

Abstract: The solubilities and refractive indices, densities of the saturated solutions in the title ternary system have been investigated isothermally at 25 ℃. In the ternary system, there are two new phases being formed, MgCl₂·CO(NH₂)₂·4H₂O(compound A) and MgCl₂·4CO(NH₂)₂·2H₂O(compound B). Compound Bis found for the first time. The two compounds are characterized by IRspectra, DTA, DSC, X-Ray diffraction etc. The solubility diagram is consisted of four crystallization surfaces corresponding to MgCl₂·6H₂O, ternary compounds A, Band CO(NH₂)₂, and three invariant points corresponding to the eutectic solutions saturated with MgCl₂·6H₂O+A, A+B, B+CO(NH₂)₂.

Key words: Ternary system, Phase equilibrium, Potassium chloride, Magnesium chloride, Urea

CLC Number:

O642.54

TrendMD:

ZHANG Feng-Xing, WEI Xiao-Lan, GUO Zhi-Zhen, SHI Qi-Zhen . Studies on the Isothermal Solubility and the New Phases in the Ternary System MgCl₂ CO(NH₂)₂ H₂O at 25 ℃[J]. Chem. J. Chinese Universities, 1998, 19(9): 1449.

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Studies on the Isothermal Solubility and the New Phases in the Ternary System MgCl₂ CO(NH₂)₂ H₂O at 25 ℃

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