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   Kinetics of Direct Amidation of Stearic Acid with Ethanolamines: Experimental Studies and Mathematical Modeling / Yanovsky V. A., Andropov M. O., Romanenko S. V., Churkin R. A., Fakhrislamova R. S. - URL: https://vestniken.bmstu.ru/catalog/chem/orch/1179.html (дата обращения: 11.03.2026) // Вестник МГТУ им. Н. Э. Баумана. Сер. Естественные науки. - 2024. - № 6. - С. 124-141.

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This paper presents the results of the study of kinetics of stearic acid direct amidation with mono- and diethanolamines in a closed thermodynamic system. The rate constants of stearic acid ethanolamides synthesis at different temperatures and the activation energy values of these reactions were determined experimentally. It has been demonstrated that the reaction of stearic acid amidation with ethanolamine in a closed system is run until the equilibrium acid–amide, which is shifted towards the reaction products, and the equilibrium constants of this reaction have been determined. Also, it has been shown that the reaction of stearic acid with diethanolamine has a more complicated kinetic behavior than that with monoethanolamine, and it does not end at the stage of diethanolamide formation as far as a number of side reactions take place. A mathematical model for the process of stearic acid amidation, which takes into consideration contributions both of the main reaction and of the number of side-reactions, has been developed. The model adequacy is supported with high correlation between predicted values and experimental ones. Using this model the reaction rate constants and their activation energy values have been calculated The work was funded by Russian Foundation for Basic Research (project no. 20-33-90148) Please cite this article as: Yanovsky V.A. Andropov M.O. Romanenko S.V., et al. Kinetics of direct amidation of stearic acid with ethanolamines: experimental studies and mathematical modeling. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2024, no. 6 (117), pp. 124–141. EDN: AZTHSR