Phase Equilibria in the Urea−Biuret−Water Systemстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A thermodynamic assessment of the urea−biuret−water
ternary system and its binary subsystems has been made. The Margules
model has been applied for the description of excess Gibbs energies of binary
solutions, and the properties of ternary solutions have been assessed by using
the Muggiani method . Thermodynamic properties of
(NH2CO)2NH·(NH2)2CO (I) and (NH2CO)2NH·0.7H2O (II) have been
estimated from the condition of equilibrium between the solution and
stochiometric phases. The liquidus surface and isothermal sections of the
phase diagram of the urea−biuret−water system at the temperature interval
T = (268 to 373) K have been calculated. The comparison of calculated and experimental data is discussed.