Liquid-phase oxidation of cumene with molecular oxygen in the presence of Cu-containing oxides obtained by mechanical activation (CuMgAl-LDH) and subsequent calcination (CuMgAl-oxides) was studied. Mixed oxides were characterized by X-ray phase analysis, N₂ and NH₃ adsorption, SDO and TPR. Cumene oxidation was carried out in a static reactor; the influence of the composition and amount of oxides, temperature (60 - 90 ᴼС) and reaction time on the substrate conversion and products formation was studied. The revealed regularities are explained within the framework of the mechanism of chain radical oxidation, taking into account the features of the oxides. A strong promoting effect of phenanthroline on the activity of CuMgAl oxides was discovered and optimal oxidation conditions were established, ensuring the selective production of cumene hydroperoxide as the most popular oxidation product (more than 90% with a cumene conversion of 30%).

The effect of NH₄F modification on the physicochemical characteristics, active component state, and catalytic performance of microspherical CrO_x/Al₂O₃ during isobutane dehydrogenation to isobutylene was studied using X-ray diffraction (XRD), X-ray fluorescence (XRF), low-temperature nitrogen adsorption, UV-Vis and Raman spectroscopy, NH₃-TPD, and chemical analysis. It was found that after NH₄F application and thermal treatment of the catalyst, fluorine is distributed and adheres to the surface, altering the phase composition, textural characteristics, and acidic properties of the surface. Furthermore, phases of α-Cr₂O₃, the aluminum and chromium oxyfluorides, (Cr_xAl_2-x)O₃ solid solution are formed in the catalysts. Surface fluoride ions increase the overall concentration of acidic sites, form strong acidic sites, and increase the conversion of isobutane, the rate of isobutylene formation, and the selectivity for isobutylene during dehydrogenation. When the aluminum and chromium oxyfluorides are formed, the catalyst activity decreases, but selectivity remains high. When (Cr_хAl_2-х)O₃ phase are formed, the catalyst is deactivated.

The effect of temperature (325, 350, 380, 400, 410, 425, 450, 475°C) and activation (reduction) time (1, 2, 4, 6 hours) on the content and degree of reduction of metallic cobalt in an industrial granulated Fischer–Tropsch synthesis catalyst was studied. It was shown that a decrease in the reduction temperature can be compensated for by increasing the heat treatment time in a hydrogen flow, thereby achieving similar values of metallic cobalt in the catalyst. For example, for catalysts reduced at 325°C for 6 hours and 400°C for 1 hour, the degree of cobalt reduction was 14% and 21%, respectively. Key catalytic performance indicators (CO conversion, C₅₊ hydrocarbon productivity, and selectivity for CH₄ and C₅₊ hydrocarbons) from fixed-bed tests of these catalysts are presented. Long-term testing (up to 650 hours) demonstrated that a lower catalyst reduction temperature leads to more stable catalyst bed operation.

The creation of new propane dehydrogenation catalysts and the improvement of existing ones is of great practical interest from the viewpoint of the large-scale industrial development of propylene chemistry. The paper summarizes information on the applications of propylene, modern technologies for its production by propane dehydrogenation and platinum catalysts used for this purpose, as well as new platinum-based catalytic systems with potential for industrial application.

The deactivation of boron-containing γ-Al₂O₃ in the propane dehydrogenation reaction to olefinic hydrocarbons was studied. The main factors leading to a decrease in catalyst activity, selectivity, and stability were identified. The distribution and state of the active components in the catalytic system before and after the reaction were investigated. The nature and distribution of coke deposits formed on the catalyst during the reaction were determined. It was shown that boron-containing alumina exhibits high selectivity and operational stability in the conversion of propane to lower olefins.

The possibility of using a microchannel (MC) reactor for the synthesis of solketal from glycerol and acetone is demonstrated. The reaction proceeds efficiently in the presence of mordenite as a catalyst, which was fed as a suspension in a glycerol-methanol solution (glycerol/methanol = 2:1 v/v) at an acetone/glycerol molar ratio of 1.5. The main factors (MC reactor length, reactant feed rate, and reaction temperature) influencing the reaction rate and solketal selectivity were determined. The maximum glycerol conversion (64.8%) and solketal selectivity (94.3%) were obtained at 40 °C, a residence time of 18.85 min in a 3 m long MC reactor with a channel inner diameter of 2 mm. The efficiency of using the MC reactor in comparison with a batch reactor is demonstrated. The specific productivity of solketal in the MK reactor was 14 times higher than that of the batch reactor. These results indicate that microchannel technology can be considered a promising option for intensifying reactions for producing glycerol ketals and acetals.

In this work, the effect of synthesized (ex situ) Ni₃S₂ and Со₉S₈ catalysts on the composition and structure of heavy oil cracking products was investigated in comparison with catalysts obtained in situ using nickel and cobalt-containing precursors. The temperature range of nickel sulfide formation during heavy oil cracking was established. It was demonstrated that the use of ex situ nickel catalysts promotes the production of liquid products enriched in light fractions by more than 60 wt.%. The use of ex situ cobalt catalysts accelerates cracking reactions, which leads to the formation of more than 20 wt.% by-products, mainly gaseous. X-ray diffraction revealed NiS and CoS phases in the solid residues of cracking products, which indicates sulfidation of the initial sulfide compounds Ni₃S₂ and Со₉S₈ during the process.

An important stage in the purification of liquefied petroleum gases is the catalytic oxidation of mercaptides. The heterogeneous cobalt(II) phthalocyanine–based catalysts currently in use provide the required level of purification; however, their efficiency may decrease in the presence of amine impurities, as well as due to the limited stability of the catalytic component on the support surface. In this regard, compounds based on pyrocatecholates of variable-valence metals and their oligomeric derivatives are considered as promising catalytic components. In the present work, the catalytic activity of pyrocatecholates and oligopyrocatecholates of variable-valence metals in the oxidation of sodium isopropyl mercaptide has been investigated, and a new heterogeneous catalyst – copper oligopyrocatecholate immobilized on a high-density polyethylene matrix – has been developed. The kinetic parameters of the oxidation of sodium isopropyl mercaptide in the presence of the developed catalyst are examined in detail, and its long-term stability and morphology are evaluated. The advantage of the new catalyst over an existing industrial analogue is demonstrated, and the results of industrial implementation at Joint-Stock Company “Novoshakhtinsk Oil Products Plant” are presented.

In this work titania with different ratio of anatase and rutile was synthesized. The phase composition of the samples was varied by changing temperature of calcination. The physico-chemical properties of the samples were studied by X-ray diffraction, diffuse reflectance spectroscopy, transmission electron microscopy, energy-dispersive X-ray analysis, cyclic voltammetry, on-off curves. The catalytic activity of the samples was examined in the photocatalytic ammonia decomposition. It was shown that the catalytic activity of hydrogen formation increased with the anatase content. The highest value of the catalytic activity was 324 μmol h^-1g^-1.