Litteris et Artibus
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Item Peculiarities of obtaining 2-hydroxyethyl-1,3,4-trimethylcyclohex-3-encarboxylate(Lviv Polytechnic Publishing House, 2016) Kostiv, I. S.; Marshalok, G. O.; Lviv Polytechnic National UniversityThe process of diene cyclization of 2,3-dimethylbutadiene with 2-hydroxyethylmethacrylate was investigated. Effects of temperature, reaction duration, and ratio of reagents on the yield of 2-hydroxyethyl-1,3,4-trimethylcyclohex-3-encarboxylate was studied. Optimal conditions of passing the process were found. Kinetic regularities of 2-hydroxyethyl-1,3,4-trimethylcyclohex-3-encarboxylate obtaining has been investigated. On the basis of the obtained results the optimal conditions of the target product synthesis have been established.Item Effect of the reactants molar ratio on the kinetics of cycloaddition of 2,3-dimethylbuta-1,3-diene to methylacrylate(Видавництво Львівської політехніки, 2017-12-23) Kostiv, I. S.; Marshalok, G. A.; Lviv Polytechnic National University; Jan and Jedrzej Sniadecki University of Technology and Life Sciences in Bydgoszcz, POLANDThe cycloaddition reaction between 2,3-dimethylbuta- 1,3-diene and methylacrylate proceeds by the second order kinetics. The rate constants increase with the increase in the excess of one of the reactants. The change in the effective rate constants is described by the Michaelis–Menten equation indicating that the reaction proceeds through the initial equilibrium stage of formation of an intermediate complex which then transforms into the product. The effective rate constants, the equilibrium constants of formation of the intermediate complex, and the rate constant of its transformation into the reaction product were determined, as well as the thermodynamic parameters of the formation of the intermediate complex and the activation parameters of the transformation of the intermediate complex into the product. The limiting stage of the reaction is established and itsmechanism is suggested.Item Investigation of kinetic regularities of rice drying process(Видавництво Львівської політехніки, 2017-12-23) Kovalchuk, T. A.; Kostiv, I. S.; Lviv Polytechnic National UniversityPlace here short abstract in English (please do not exceed 100 words, use Abstract style). The abstract should briefly present the purpose, principal results and novelty of your research.