: The possibility of joint utilization of municipal solid waste (MSW) slag and drill cuttings by their recycling into complex mineral fertilizers through the use of lean-grade phosphorite as a source of phosphorus has been considered. Also, the recycling of three-component raw materials has been carried out with 50-65% sludge sulfuric acid from the propylene hydration process at 80°C. The consumption rate of sulfuric acid required to obtain mineral fertilizers with a sufficient content of Р2О5assim. has been determined with due regard for the presence of the increased content of sesquioxides in the drill cuttings. Comparative results of the recycling MSW with phosphorite and three-component raw materials confirming the absence of harmful effect of drill cuttings on the recycling process and the role of the nature of the used sulfuric acid on the parameters of the recycling process have been shown.

The extraction purification process is currently being intensively studied and has a great future as an alternative method of purification of petroleum fractions. The point is that the development of technology and rise in the consumption of fuels and oils calls for tightening of requirements to their quality characteristics. At the same time, special attention is paid to the content of aromatic hydrocarbons, sulfur-containing and resinous compounds in their composition. The present review considers the results of studies of extractive purification of various oil fractions using both traditional and "green" solvents - ionic liquids as an extractant providing for the effectiveness of ion-liquid extraction purification. The article also describes studies on combining the process of ion-liquid extraction with an oxidative purification method. The results of studies carried out at the Institute of Petrochemical Processes of the National Academy of Sciences of Azerbaijan on ion-liquid extraction purification of petroleum distillates for various purposes, in particular, transformer oil distillate, catalytic cracking and reforming gasoline, AMG-10 hydraulic fluid, Naftalan oil, diesel fuel, as well as oil distillates fractions with different viscosity values, are shown in the article. Also, the possibility getting petroleum products when used as a selective solvent of ionic liquids (morpholformate, anilinformate, N-methylpyrrolidone acetate, etc.) differing in cationic-anionic combination is substantiated.

As a result of copolymerization of N-vinyl carbazole with styrene, the optically transparent copolymer was synthesized and the regularities of the copolymerization process, the composition and structure of the copolymer determined. The copolymerization constant values were determined by the Fineman–Ross method (r1=0.032, r2=5.5). It found that the styrene shows higher activity than N-vinyl carbazole. The parameters value of the copolymer microstructure was reveled. The obtained copolymer has a sufficiently high light-refractive index ( 20 nD =1.6504). The light transmission capacity of the copolymer is 87-89%. Varying the initial composition of the copolymer, the influence of the composition on the physicalmechanical properties of the copolymer was determined. It found that with an increase in N-vinyl carbazole links, the thermal stability in the copolymer increased proportionally. It was established that the mass loss of this copolymer at 280°C during thermal degradation was 5-6 %.

This article reports on obtaining the inclusion compounds of the monoammonium-glycyrrhizin salts with urea, thiourea and methylolthiourea. The compounds were obtained by the liquid phase way, and their structures were characterized by the UV- and IR-Spectroscopic methods. Proceeding from the spectral data, it was concluded that the complexation occurs through the interaction of polar groups of the components. The composition of the complexes was studied using the method of isomolar series. Equilibrium constants and changes in Gibbs free energy of the complexation process were also calculated. The biological activity of complex compounds was studied on the example of fungicidal activity of one of the most common pathogenic fungus Fusarium. The obtained compounds can be used as as fungicides and stimulants in agriculture.

A new functional cast iron alloyed with transition metals was synthesized for the manufacture of the working part of rolls. Its properties were studied using complex methods of physicochemical analysis (DTA, X-ray, MSA and measurement of hardness and microhardness). It was found that traces of martenicite, cementite, carbon (graphite) and α-ferritin are released in the subsolidus during cooling of molten iron in the studied concentration range (2.7 ÷ 3.5 %wt C. It includes transition metals as an alloying agent increasing resistance of cast iron to twisting, corrosion and destruction during operation.

Данная работа посвящена изучению математической модели для оптимизации процесса получения тонких пленок Bi-Se электрохимическим методом. Исследование проводилось потенциодинамическим, потенциостатическим и гальваностатическим методами, в различных условиях на Pt и Ni электродах. Математические расчеты были выполнены в программном пакете с использованием специально разработанного для этого процесса программного обеспечения. С изучением влияний различных факторов (концентрации исходных компонентов, температуры, плотности тока и т.д.) были выбраны оптимальный режим электролиза и состав электролита для процесса совместного осаждения. По этим результатам для будущих целей были назначены критерии Снедоккора и Фишера и оценены коэффициенты регрессии. Полученное уравнение регрессии определяет содержание электролита и условия электролиза, которое позволяет осаждать сплав Bi-Se, содержащий в составе необходимое количество Bi.

The influence of the graphite concentration on the main physical-mechanical properties of nanocomposites based on such polyolefin as high density polyethylene, low density polyethylene and polypropylene is considered. Properties such as tensile yield stress, ultimate tensile stress, and ultimate bending strength, elongation at break, heat resistance, flexural strength, MFI, and melting points are analysed. To improve the compatibility of the mixed components of the mixture, we used an Exxelor PO1040 compatibilizer for all grades of polyethylene and Exxelor PO1020 for polypropylene. Graphite was introduced into the composition of polyolefin at the following concentrations: 1.0, 3.0, 5.0, 10, 15, 20, and 30 wt%. As a result of the research, it was found that the introduction of graphite into the composition of polyolefin was accompanied by an improvement in strength characteristics with maximum at various concentrations. For high density polyethylene, the maximum values of strength characteristics are observed at 3.0 wt%, for low density polyethylene at 10 wt%, and for polypropylene at 5.0 wt% content of graphite. It revealed that such a difference in the value of the threshold concentration of graphite which provides the maximum value of strength indicators,was directly related to the degree of crystallinity of the polymer matrix.

Kinetic regularities of the oxidative dehydrogenation reaction of methylcyclohexane on the -clinoptilolite catalyst were investigated. Absence of internal and external diffusion inhibition was established, the reaction proceeds in the kinetic area, in which all diffusion stages proceed much faster than all chemical stages that make up the mechanism of this reaction. The influence of partial pressures of reagents, the reaction temperature and the space velocity of the reaction mixture on the course of the reaction was studied and optimal conditions for obtaining the intentional reaction product determined.

The effect of ionizing radiation on the organoleptic properties and shelf life of some vegetables (potatoes, onions, carrots and beets, tomatoes and sweet peppers) has been studied. Samples of vegetables were packed in special polymer dishes, and for the purpose of dosimetry, 3 ampoules containing 5 ml of purified benzene were placed next to the samples in each dish. Also, vegetable samples and ampoules were irradiated with doses of 0.5 kGy, 1.0 kGy, 3.0 kGy and 5.0 kGy of ionizing gamma radiation from 60Co sources of the sterilization installation on May 19, 2021. The surface and organoleptic properties of irradiated samples of vegetables placed in a dry, ventilated room, were periodically explored. After a while, deterioration of the organoleptic properties of some samples was recorded, and these samples with spoiled consumer properties were selected and removed from the room. The quantity of potatoes and onions with spoiled consumer properties from May 18, 2021 to August 15, 2021 among unirradiated samples and irradiated with absorbed doses of 3.0 and 5.0 kGy was approximately 30-40%. However, in contrast to the irradiated samples, a gradual germination of non-irradiated, unspoiled samples of potatoes and onion (kept under the same conditions as the irradiated samples) was observed in the reviewed period. Until August 15, 2021, no changes in the appearance and organoleptic properties of potato and onion samples irradiated with doses of 0.5 and 1.0 kGy were detected. It found that to prevent germination and to increase the shelf life of potatoes and onions, their irradiation with doses of 0.5 and 1.0 kGy was required; for a 2-3 fold rise in the shelf life of other types of vegetables, irradiation with absorbed doses of no more than 0.5 kGy is required