Abstract
Phase equilibria are studied in sections of the systems NaCl–CO(NH2)2–H2O, CaCl2–CO(NH2)2–H2O, and NaCl–CaCl2–CO(NH2)2–H2O at temperatures from 0 to –57°C. The features of the mutual influence of the components on the temperatures of the eutectics in the systems and on the deicing ability of urea–salt mixtures are determined. It is found that the introduction of urea into the systems CaCl2–H2O and NaCl–CaCl2–H2O gives rise to low-temperature eutectics with crystallization temperatures of –54 and –57°C, which are promising for the development of low-temperature deicing agents on their basis.
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Funding
This work was supported by the Ministry of Science and Higher Education of the Russian Federation as part of the State Assignment for the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.
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Translated by V. Glyanchenko
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Frolova, E.A., Kondakov, D.F. & Danilov, V.P. Phase Equilibria in Water–Salt Systems Containing Sodium and Calcium Chlorides and Urea at Temperatures below 0°C. Theor Found Chem Eng 57, 997–1001 (2023). https://doi.org/10.1134/S0040579523050081
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DOI: https://doi.org/10.1134/S0040579523050081