According to the results of research in the waters of the Alakol water reservoir on hydromorphological parameters, a large number of dangerous pollutants, including compounds of heavy metals, pesticides, ammonia, ammonium, ammonium, ammonium, ammonium. A correlation between the heat treatment temperature and the structure of the pitch obtained was established.
Introduction
A similar anisotropic structure was observed for a sample of coal tar obtained at 400 °C, and in some areas a layered structure was observed, which could be associated with an increase in the degree of graphitization of the samples. The course of mesophase transformations depends on the physico-chemical properties of the raw material and the temperature regime for the processing.
Experimental part
An important characteristic of tar is the content of sulfur and insoluble residues, which determine the quality of the tar [7]. The quality of the mesophase droplets and their fiber-forming properties were determined by the degree of aromatization of the original resin, the presence of highly condensed structures in it [9].
Results and discussion
Analysis of Raman spectra allows to evaluate the effect of the heat treatment on the degree of graphitization of the initial coal tar. For the samples treated up to 400 °C, a shift of the D peak towards the range of 1600–1610 cm-1 was observed, which is explained by the formation of nanocrystalline mesophase centers.
Conclusion
Innovative, «green» methods for the synthesis of substituted pyrazolines are being developed: activation of the reaction by ultrasound [11], microwave irradiation [18], thermal reactions without a solvent using a biodegradable maltose catalyst [19]. The aim of this work is the study of the effect of the base strength and the.
Results and discussion
The 1Н NMR spectra of products 6‒10 contain doublet signals of the para-substituted phenyl group in the range δ 7-8 ppm and the signal of the para-methyl substituent in the range δ 2.29-2.38 ppm. In addition, we obtained quantum chemical confirmation of the advantage of the formation of spirocyclic tosylation products of β-aminopropioamide oximes 6‒9 with negative values of ΔrG° - the Gibbs energy of the chemical reaction kJ/mol) and the disadvantage of the formation of a spiro structure with a positive value of ΔrG° for β-(benzimidazol-1-yl)propioamidoxime at 31.76 kJ/mol) [25].
Experimental part
High efficiency of the method was demonstrated in many processes of electrocatalytic hydrogenation of organic compounds [3-5] and. The electrocatalytic activity of the prepared copper and nickel powders was studied in the processes of electrohydrogenation of acetophenone (APh), nitrobenzene (NB), p-nitroaniline (p-NA) and cyclohexanone (CH).
Conclusions
Selection of a suitable method for the synthesis of NANO copper nanoparticles: Brief reports and reviews. Polyacrylate-assisted synthesis of stable copper nanoparticles and copper(I) oxide nanocubes with high catalytic efficiency J.
Кіріспе
Зерттеу нәтижелері «Солтүстік Бозашы» мұнай-газ ауданының мұнайлары ванадил порфириндік кешендерді алу үшін перспективалы шикізат болып табылады деген қорытынды жасауға мүмкіндік береді. Құрамы бойынша «Солтүстік Бозашы» мұнайы ауыр және тұтқыр мұнай, Қазақстан Республикасының СТ 1474-2016 мемлекеттік стандартының талаптарына сәйкес мұнайдың шартты белгіленуі – 3.4.1.0.
Тәжірибелік бөлім
Нәтижелер және оларды талқылау
A review of the unconventional methods used for demetallization of petroleum fractions during the last decade. Properties of the composition of vanadyl porphyrins in the crude extract of high vanadium heavy oil asphaltenes. Based on the research results, we summarize that the inhibitors are compatible with salt water in the studied oil fields.
Reason for technologies to reduce salt deposits in the wells of the Mamontovskoye oil field. KINETIC STUDY ON THE OBTAINMENT OF POTASSIUM HUMATE FROM LIGNITE OF THE LENGER DEPOSIT. Kinetic investigation of potassium humate extraction from lignite from the Lenger deposit.
Due to an increase in the concentration of alkali used in the production of potassium humate, the yield of the resulting potassium humate increases [3-4].
![Figure 1 – Techniques to prevent scale formation [10].](https://thumb-ap.123doks.com/thumbv2/azdokorg/10578706.0/62.722.86.631.134.678/figure-1-techniques-prevent-scale-formation-10.webp)
Conclusions
Эксперименттiк бөлiм
Нәтижелер және оларды талқылау
Қорытынды
According to the results of the study, the effect of micronutrients on the human body was taken into account. After complete dissolution of the mixture in the flask, the sodium triiodide solution was added to the tryptophan solution. Determination of the melting point of the compound was carried out using a synchronous thermoanalyzer STA 449 F1 Jupiter (NETZSCH), which combines simultaneous measurement of mass changes (thermogravimetry) and heat fluxes.
The thermograms included differential curves of change in the heat capacity of the sample. The temperature at the beginning of the peak, which corresponds to the melting point of the sample, was determined. The antimicrobial activity of the coordination compound was studied using the two-fold serial dilution method in a liquid nutrient medium [19].
The turbidity of the obtained inoculum was monitored by measuring the optical density on a DEN-1 densitometer (Biosan, Latvia).
Results and Discussion
The negative charge of polyanion (I4)-2 is compensated by the positive charge of tryptophan (C11H13N2O2)+ and Na+ cation (Figure 2). In the three-dimensional packing of the crystal structure of the compound C11H12N2O2•(C11H13N2O2)+•Na+•2Н2О•(I4)2-, the Na+ cations are octahedral coordinated by six oxygen atoms, forming infinite bands in the direction of the plane 3) . Differential curves of the heat capacity change of the sample were recorded in the thermogram.
Some physicochemical parameters of the di-((2S)-2-amino-3-(1H-indol-3-yl)propionate)dihydro-tetraiodide complex are presented in Table 3. Thus, the new complex does not cause a mutagenic effect. on mammalian cells of the L5178Y line, both in the presence and absence of metabolic activation. The new complex does not cause any mutagenic effect on mammalian cells of the L5178Y line, both in the presence and in the absence of metabolic activation.
One of the most effective methods of corrosion protection of field equipment and pipelines in the oil and gas industry is the use of corrosion inhibitors.
Research methodology
This leads to the formation of deposits on the surface of the steel, which will affect the development of corrosion processes. In the course of the work, electrochemical studies were carried out using known methods. The presence of oxygen in the solution is due to the presence of partial pressure and the contact of the electrolyte with the environment.
Changing the values of the hydrogen index causes a decrease in the rate of hydrogen depolarization. With further oxidation of iron, chemisorption processes occur on the surface of the metal plate, which causes a decrease in the rate of the cathode process. Research work agrees well with thermodynamic parameters and values of electromotive forces. The lower the Gibbs energy in the system, the higher the rate of the corrosion process.
In the course of the study, the thermodynamic parameters of the inhibition process (ΔG°, ΔH°, ΔS°) were calculated.
Зерттеу материалдары мен әдістері
Зерттеу нәтижелер i және оларды талдау
We obtained a mixture of graphite and salt from foam graphite using the heat treatment method and determined the conditions for its efficient production. The composition of natural graphite class GL-1 from the Russian deposit was determined. Using IR spectroscopy, they found that there are different groups on the penographite surface.
Analysis of the CS spectra of penographite enabled us to determine the structure of graphite and penographite. The studies carried out have shown that penographite varies according to the shapes of the spectrum, a set of spectral properties that allow us to quantify the degree of maturity of the crystal lattice and identify various defects. Raman spectroscopy for a complete understanding of the results of the analysis, studies were carried out scanning electron microscopy (SEM) on a layered structure of penografia.
It has been proven that the thermal effect of high temperature significantly changes the quantitative composition of the mixture and the content of different elements depends on the temperature of the thermal blanket.
Введение
Экспериментальная часть
Результаты и их обсуждение
В процессе проведения экспериментальных исследований установлено, что полиимиды с наибольшими значениями приведенной вязкости образуются при концентрации мономера 25 мас.%, температуре 110 ºС в течение 3 часов. Приведены константы скорости реакции ацилирования при температуре 110 ºС для реакции 7-оксобициклоангидрида (2,2,1)-гептен-2,3-дикарбоновой кислоты (МАФ) с ДАДФО и ДОТФДА в присутствии третичных аминов. в таблице 1 показано.
Константы скорости ацилирования ДАФБ и ДОТФДА диангидридом МАФ в присутствии 15 масс.% ТМА при температуре 110 ºС
Заключение
34;Современные проблемы высшего образования и науки в области химии и химической технологии». Материалы международного симпозиума «Современные проблемы высшего образования и науки в области химии и химической технологии», МатериалыМеждународного-родногосимпозиума «Современные проблемы высшего образования и науки в области химии». и химической инженерии», Алматы. Способ синтеза арилалициклических полиимидов на основе 7-оксодицикло(2,2,1)-гептен-2,3-дикарбоновой кислоты (МАФ) и диаминодифенилоксида (ДАДФО) и диокситрифенилдиамина (ДОТФДА). ) в полярных растворителях апротонного амидного типа подробно изучены в присутствии катализатора основного типа: триметиламина. Природа и реакционная способность стартовых мономеров влияют на процесс получения полиимидов.
In addition, they differ in thermoplasticity in the range from 210 ºС to 250 ºС, have thermal stability and do not decompose when heated in air to temperatures of 335-390 ºС, and the presence of oxide groups in the structure of polymers increases the solubility of polyimides. One-step synthesis of polyimides based on diesters of tricyclodecenecarboxylic acids, Vestnik KazNU im. One-step synthesis of flexible chain aryl-alicyclic polyimides, Materialy Mezhdunarodnogo simpoziuma «Sovremennye problem vysshego obrazovaniya i nauki v oblasti himii i himicheskoj inzhenerii» [Materials of the Int.
Reëlmatighede van die sintese van poliimiede gebaseer op dianhidriede van butaan-tetrakarboksielsure, Materialy Mezhdunarodnogo simpoziuma "Sovremennye problemy vysshego obrazovaniya i nauki v oblasti himii i himicheskoj inzhenerii" [Materiale van die Int.
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Samples of contaminated and neutralized soil were treated with a humate-based energy agent. It was established that the contaminated soil belongs to substances of the 3rd danger class. Articles are reviewed by members of the editorial board and the editorial board, as well as invited reviewers from abroad.
The decision to select a reviewer to review the article is made by the editor-in-chief. The decision to publish is made by the journal's editorial staff after review. The decision to refuse publication of the manuscript is made at an editorial meeting following recommendations from the reviewers.
An article that is not recommended for publication by the decision of the editors will not be accepted for reconsideration.
![Figure 2 – Classification of scale inhibitors [11].](https://thumb-ap.123doks.com/thumbv2/azdokorg/10578706.0/63.722.131.604.103.484/figure-2-classification-scale-inhibitors-11.webp)
