Phase equilibria in binary subsystems of urea–biuret–water system
作者： T. S. Babkina , A. V. Kuznetsov
DOI: 10.1007/S10973-010-0829-2
关键词:
摘要: Joint results of the differential scanning calorimetry (DSC) and thermogravimetry (TG) experiments were basis for fusion enthalpy temperature determination biuret (NH2CO)2NH (synthesis by-product urea fertilizer (NH2)2CO). Recommended values are Δm H = (26.1 ± 0.5) kJ mol−1, T m = (473.8 ± 0.4) K. The DSC method allowed phase diagrams “water–biuret,” “water–urea,” “urea–biuret” binary systems to be studied; as a result, liquidus solidus curves precisely defined. Stoichiometry decomposition hydrate identified, composition compound in system was suggested.
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