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Phase Equilibria in Water–Salt Systems Containing Sodium and Calcium Chlorides and Urea at Temperatures below 0°C
Theoretical Foundations of Chemical Engineering ( IF 0.8 ) Pub Date : 2024-01-17 , DOI: 10.1134/s0040579523050081 E. A. Frolova , D. F. Kondakov , V. P. Danilov
更新日期：2024-01-18
Theoretical Foundations of Chemical Engineering ( IF 0.8 ) Pub Date : 2024-01-17 , DOI: 10.1134/s0040579523050081 E. A. Frolova , D. F. Kondakov , V. P. Danilov
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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