Перегляд за Автор "Masalitina, N. Yu."
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Документ Development of safe technology of obtaining fatty acid monoglycerides using a new catalyst(ПП "Технологічний Центр", 2022) Bliznjuk, O. N.; Masalitina, N. Yu.; Mezentseva, Iryna; Novozhylova, Tetiana; Korchak, Mykola; Haliasnyi, Ivan; Gavrish, Tatiana; Fomina, Iryna; Khalil, Viktoriya; Nikitchenko, OlgaFatty acid monoglycerides are a valuable component of the products of various industries. The emulsifying ability of monoglycerides is used in cosmetic, pharmaceutical, and food production. The process of fatty acid monoglycerides obtaining by the reaction of vegetable hydrogenated fat (salomas) with glycerol (glycerolysis method) has been studied. Potassium glycerate is used as a catalyst, which is characterized by high efficiency and safety of production and use. A feature of the work is the study of the dependence of the yield and melting point of monoglycerides on the technological parameters of glycerolysis. As a raw material, hydrogenated refined fat according to DSTU 5040 (CAS Number 68334-28-1) was used: melting point – 48 °C, mass fraction of moisture and volatile substances – 0.08 %, acid value – 0.25 mg KOH/g, peroxide value – 2.8 ½ O mmol/kg. In all experiments, the glycerolysis temperature was 180 °C, the catalyst concentration – 0.5 % in terms of metal. Rational conditions for glycerolysis were determined: duration (90 min.) and glycerol concentration (50 %). Under these conditions, the monoglycerides yield was 32.9 %, melting point – 61.5 °C. The mass fraction of free glycerol in monoglycerides was 1.0 %, acid value – 2.2 mg KOH/g. The efficiency of monoglycerides obtaining using potassium hydroxide and glycerol mixture as a catalyst under certain rational conditions has been studied. The monoglycerides yield of 30.1 %, melting point of 59 °C were obtained. Therefore, the use of potassium glycerate catalyst is more efficient. The results of the study make it possible to improve the technology for the production of fatty acid monoglycerides using a new catalyst and use resources rationally.Документ Energy loss and inelastic scattering of photoelectrons in N₂ doped solid Kr(al-Farabi Kazakh National university, 2014) Ogurtsov, A. N.; Bliznjuk, O. N.; Masalitina, N. Yu.Документ Evidence of defect phase formation in photoirradiated solid Xe: Steady-state kinetic study(2006) Masalitina, N. Yu.; Bliznjuk, O. N.; Ogurtsov, A. N.Документ Kinetic analysis of sample degradation progress curves(2005) Ogurtsov, A. N.; Masalitina, N. Yu.; Bliznjuk, O. N.Документ Kinetic modeling of the catalytic ammonia oxidation to N₂O(Український державний хіміко-технологічний університет, 2017) Bliznjuk, O. N.; Ogurtsov, A. N.; Savenkov, A. S.; Masalitina, N. Yu.Документ Mathematical modeling of the equilibrium between nitrogen(II) and (IV) oxides in the combined process of metals extraction from the spent catalysts(Український державний хіміко-технологічний університет, 2019) Suvorin, A. V.; Savenkov, A. S.; Shmelev, A. S.; Bliznjuk, O. N.; Ozheredova, M. A.; Masalitina, N. Yu.; Ogurtsov, A. N.The paper gives the results of the study of equilibrium between nitrogen(II) and (IV) oxides under the conditions of the combined process of nitrogen oxides chemisorption from their mixtures with air and the extraction of metals from spent catalysts by an aqueous solution that contacts with the catalyst and the extractant. The mechanism of the combined process was established and the mathematical model was created that takes into account the interaction between nitrogen oxides and water with the formation of nitric acid, its subsequent interaction with the reactive component of the spent catalyst and the extraction of the formed metal nitrates. The investigation was performed and the mathematical model was developed for the determination of the equilibrium composition of nitrogen oxides in the production of nitric acid and the calculation of the equilibrium concentration and conversion degree of nitrogen oxides in the combined process. DIAP-3-6N catalyst was used as an example and the algorithm was proposed for the calculation of the time variation of the composition of a three-phase system "solid–liquid–gas". A mathematical model of the process was created that takes into account the dependence of the equilibrium conversion degree of nitrogen oxides on the consumption rate of the produced nitric acid in the extraction of metals from the catalyst.Документ Modeling of ammonia oxidation on a platinoid catalyst, taking into account the N₂O formation(Pleiades Publishing, 2015) Savenkov, A. S.; Bliznjuk, O. N.; Kuznetsov, P. V.; Vyatkin, Yu. L.; Masalitina, N. Yu.A mathematical model of ammonia oxidation on a platinoid catalyst, taking into account the N₂O formation, was developed. The possibilities of lowering the amount of N₂O, which is formed as by-product in high-temperature oxidation of ammonia in nitric acid production, are examined. The developed model allows calculation of the reactor for ammonia oxidation using platinoid catalysts of different geometric profiles.Документ Optical detection of radiation-induced defect phase formation in solid XE(2016) Ogurtsov, A. N.; Bliznjuk, O. N.; Kleshchev, N. F.; Masalitina, N. Yu.Документ Purification of Cr(VI)-containing wastewater by chemical precipitation: test results of an experimental-industrial installation(Український державний хіміко-технологічний університет, 2021) Suvorin, A. V.; Shorokhov, M. N.; Ozheredova, M. A.; Bliznjuk, O. N.; Ryshchenko, I. M.; Masalitina, N. Yu.We present the main results of experimental and industrial study of the developed process and pilot plant for purification of the Cr(VI)-containing rinse water by chemical precipitation. This technique implies full or partial return of treated water to rinse workpieces after chromium plating and prepare working solutions (precipitators). We characterize the manufacturing scheme of the pilot plant and the mode of its performance. Saturated aqueous solutions of Cа(OH)₂ and Bа(OH)₂ were used as precipitating reagents. The tests confirmed the possibility of automatic dosing the reagents with due regard for the pH value of a medium, which can be used in both continuous and periodic rinsing. The operating conditions of rinsing the workpieces after electrochemical chromium plating were justified. We derived the equation for the calculation of the total salt content in the rinse water after its purification. We determined the duration of the rinsing without the need to renew the bath volume. The performed calculations substantiated the possibility of reducing the consumption of fresh water supplied for rinsing by the recycling of wastewater without deteriorating the quality of the rinsed workpieces. The reduction of water consumption by 35% was observed as compared with that stated by the regulations.Документ Radiation-induced inelastic processes in Rare-gas Solids probed by VUV luminescence spectroscopy(2006) Savchenko, E. V.; Khyzhniy, I. V.; Ogurtsov, A. N.; Masalitina, N. Yu.; Bliznjuk, O. N.; Stryganyuk, G.; Zimmerer, G.Документ Recombination kinetics in model condensed matter system(2005) Ogurtsov, A. N.; Masalitina, N. Yu.; Bliznjuk, O. N.Документ Thermal inactivation of defect formation induced by exciton self-trapping in rare-gas solids(2015) Ogurtsov, A. N.; Bliznjuk, O. N.; Kleshchev, N. F.; Masalitina, N. Yu.Документ Thermal inactivation of excitonically-induced defect formation in rare-gas solids(2007) Masalitina, N. Yu.; Bliznjuk, O. N.; Ogurtsov, A. N.