Abstract
This paper examines the development of a liquid de-icing reagent based on calcium and magnesium nitrates obtained from dolomite and urea. It discusses the limitations of conventional salt-containing mixtures, reviews existing technologies for producing nitrate–urea formulations, and describes the main stages of preparing the proposed liquid composition. The study employed nitric-acid processing of dolomite, formulation with urea, pH monitoring, and volumetric and titrimetric chemical analyses. The reagent was tested under subzero conditions, including road trials at the Kamchik Pass. According to recommendations of the Uzavtoyul Research Institute, the liquid formulation may be used to remove road ice at temperatures down to -32 °C. Technical specifications TSh 00203068-24:2014 were registered for the NКММ product. The findings support the practical potential of a liquid nitrate–urea de-icing formulation; detailed environmental safety and comparative performance assessments remain necessary.
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