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Integrated Technology for Processing of Apatite Concentrate 加工磷灰石精矿的集成技术
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050172
E. P. Lokshin, O. A. Tareeva
{"title":"Integrated Technology for Processing of Apatite Concentrate","authors":"E. P. Lokshin,&nbsp;O. A. Tareeva","doi":"10.1134/S0040579523050172","DOIUrl":"10.1134/S0040579523050172","url":null,"abstract":"<p>A technology is proposed for processing of apatite concentrates by decomposition by phosphoric acid at 20°C in the presence of a sulfonic cation-exchange resin, defluorination of the obtained phosphoric acid, desorption of the sorbed cations with concentrated solutions of alkali metal salts, sequential hydrolytic precipitation of the thorium-enriched impurity cake and nonradioactive concentrate of carbonates of rare-earth and alkaline-earth elements, and regeneration of the sulfonic cation cation-exchange resin from the Na<sup>+</sup> form to the H<sup>+</sup> form. It is shown that the technology is also applicable for the processing of apatite concentrate with a high content of rare-earth elements and strontium. The technology ensures the recovery of all valuable components into commercial products while minimizing the consumption of reagents and energy, the amount of generated waste, and the environmental pollution.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1154 - 1164"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetically Investigation of Ibuprofen Ozonation Catalyzed by Graphene Oxide/Fe3O4: A Monte Carlo Simulation 氧化石墨烯/Fe3O4 催化布洛芬臭氧反应的动力学研究：蒙特卡罗模拟
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050391
Hamid Dezhampanah, Hamed Moradmand Jalali
{"title":"Kinetically Investigation of Ibuprofen Ozonation Catalyzed by Graphene Oxide/Fe3O4: A Monte Carlo Simulation","authors":"Hamid Dezhampanah,&nbsp;Hamed Moradmand Jalali","doi":"10.1134/S0040579523050391","DOIUrl":"10.1134/S0040579523050391","url":null,"abstract":"<p>Kinetic Monte Carlo modeling was employed as a powerful tool to kinetically investigate of ibuprofen removal by direct ozonation (O<sub>3</sub> alone) and heterogeneous catalytic ozonation (graphene oxide and graphene oxide loaded with Fe<sub>3</sub>O<sub>4</sub>). The kinetic mechanisms and the values of rate constants for each step of the suggested mechanisms were found by Monte Carlo simulation. The graphene oxide loaded with Fe<sub>3</sub>O<sub>4</sub> displays a significant role as a heterogeneous catalyst in the ozonation of ibuprofen by enhancing the reactivity of ibuprofen drug and O<sub>3</sub> on the graphene oxide surface. Optimized values of catalysts and O<sub>3</sub> were attained through obtaining the effect of initial O<sub>3</sub> and catalyst amounts on the rate of ibuprofen elimination utilizing kinetic Monte Carlo simulation. The simulation outcomes of the present investigation demonstrate satisfactory agreement with the experimental ozonation data for the systems above.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"889 - 897"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stratiform Anorthosite Associations of Differentiated Basitic Massifs in Russia. Part 2. Genesis 俄罗斯分异基性块岩的层状正长岩群。第 2 部分：成因成因
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050147
V. A. Krenev, S. V. Fomichev, D. F. Kondakov, E. N. Pechenkina, E. I. Berbekova, V. K. Ivanov
{"title":"Stratiform Anorthosite Associations of Differentiated Basitic Massifs in Russia. Part 2. Genesis","authors":"V. A. Krenev,&nbsp;S. V. Fomichev,&nbsp;D. F. Kondakov,&nbsp;E. N. Pechenkina,&nbsp;E. I. Berbekova,&nbsp;V. K. Ivanov","doi":"10.1134/S0040579523050147","DOIUrl":"10.1134/S0040579523050147","url":null,"abstract":"<p>Data on the crystallization of the basic magma and its intrachamber and intrapocket (deep-seated) differentiations are given. Problems of the genesis of stratiform anorthosites are considered.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1016 - 1024"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mathematical Modeling and Simulation of Methane Steam Reforming Membrane Reactor 甲烷蒸汽转化膜反应器的数学建模与仿真
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S004057952305041X
Ravikant R. Gupta, Richa Agarwal
{"title":"Mathematical Modeling and Simulation of Methane Steam Reforming Membrane Reactor","authors":"Ravikant R. Gupta,&nbsp;Richa Agarwal","doi":"10.1134/S004057952305041X","DOIUrl":"10.1134/S004057952305041X","url":null,"abstract":"<p>The present investigation pertains to a theoretical study of mathematical model for methane steam reforming in membrane reactor, by simulating the operating variables of the reactor for high hydrogen yield and methane conversion. Basically, it deals with the development of the mathematical model of a fluidized bed Auto thermal membrane reactor (without integrated O<sub>2</sub> perm-selective membranes), by using the mass balance macroscopically. Model is validated with the available experimental data in the literature and was found that the prediction from the models is in excellent agreement with the experimental values, with a maximum deviation of –12 to +13% and –12 to +1.8% for methane gas conversion and hydrogen yield, respectively. Finally, it investigates the effect of operating variables namely, reactor pressure, temperature, and steam to methane ratio (SMR) and permeates side pressure, on the methane gas conversion and hydrogen. The prediction reveals that the hydrogen yield and methane conversion increases with increase in reactor temperature and pressure whereas decreases with increase in SMR and permeate side pressure.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"957 - 966"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measurement of the Dynamic Viscosity of Filled Composites on the Basis of Thermosetting Cast Polyurethane 以热固性浇注聚氨酯为基础测量填充复合材料的动态粘度
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050068
A. S. Dorokhov, Yu. A. Goncharova, A. S. Sviridov, S. P. Tuzhilin, R. A. Alekhina
{"title":"Measurement of the Dynamic Viscosity of Filled Composites on the Basis of Thermosetting Cast Polyurethane","authors":"A. S. Dorokhov,&nbsp;Yu. A. Goncharova,&nbsp;A. S. Sviridov,&nbsp;S. P. Tuzhilin,&nbsp;R. A. Alekhina","doi":"10.1134/S0040579523050068","DOIUrl":"10.1134/S0040579523050068","url":null,"abstract":"<div><p><b>Abstract</b>—Studies on the dynamic viscosity of composites based on a two-component polyurethane compound with fillers in the form of shungite, talc, and basalt fibers (3 vol %) with addition of dichloromethane as an organic solvent (10 vol %) are presented. Based on the results of the studies, it is revealed that the most rational composites for casting into elastic molds are the composites containing shungite and talc as fillers.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1116 - 1119"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Metalloporphyrins of Oil from the Severnoe Buzachi Oil Field: UV, IR, and EPR Studies Severnoe Buzachi 油田石油中的金属卟啉：紫外线、红外线和 EPR 研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050238
Zh. K. Myltykbaeva, A. V. Anisimov, Zh. T. Eshova, A. B. Seisembekova, M. B. Smaiyl
{"title":"Metalloporphyrins of Oil from the Severnoe Buzachi Oil Field: UV, IR, and EPR Studies","authors":"Zh. K. Myltykbaeva,&nbsp;A. V. Anisimov,&nbsp;Zh. T. Eshova,&nbsp;A. B. Seisembekova,&nbsp;M. B. Smaiyl","doi":"10.1134/S0040579523050238","DOIUrl":"10.1134/S0040579523050238","url":null,"abstract":"<div><p>The spectrophotometric studies of vanadylporphyrin complexes isolated from the oil of the Severnoe Buzachi field with absorption maxima at 534 and 573 nm showed that the dominant compounds were etioporphyrins (ETIOs) and deoxophylloerythro-etioporphyrins (DPEPs), and that extraction with N,N-dimethylformamide allows extraction of vanadylporphyrin complexes from oil without destroying their structure. The ETIO/DPEP ratio of vanadylporphyrins was 1.14–2.17. The IR spectra of the isolated vanadylporphyrin fractions indicated that the content of free porphyrins was extremely low judging by the presence of deformation and out-of-plane vibrations of the NH group in the ranges 3250–3400 and 960–980 cm<sup>–1</sup>. This suggests that the extraction method for isolating vanadylporphyrins does not lead to their demetallization. The EPR spectral data confirmed the high concentration and purity of vanadylporphyrin, which correlates well with the UV spectral data and indicates that chromatographic purification and separation of the extract is efficient.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1126 - 1132"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Composite Photocurable Materials for Repair Purposes 用于修复的复合光固化材料
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523310020
O. E. Babkin, L. A. Babkina, V. V. Il’ina, O. S. Aikasheva, K. V. Izotova
{"title":"Composite Photocurable Materials for Repair Purposes","authors":"O. E. Babkin,&nbsp;L. A. Babkina,&nbsp;V. V. Il’ina,&nbsp;O. S. Aikasheva,&nbsp;K. V. Izotova","doi":"10.1134/S0040579523310020","DOIUrl":"10.1134/S0040579523310020","url":null,"abstract":"<div><p>The work considers principles for the design of photocurable repair-purpose materials, the main advantage of which is the possibility of rapid formation of high-strength, adhesive, jointless coatings and coverings for sealing, insulation, protection, and repair of surfaces of various natures, such as metal, concrete, and plastic. The application of such materials is validated in the practice of pipeline repair (including oil pipelines and mud lines).</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1120 - 1125"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the Possibility of Using Aniline Production Waste to Produce Electrically Conductive Polymers 利用苯胺生产废料生产导电聚合物的可能性研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050251
S. A. Orlova, T. V. Khokhlova, O. I. Tuzhikov, O. O. Tuzhikov, I. V. Lavnikova
{"title":"Study of the Possibility of Using Aniline Production Waste to Produce Electrically Conductive Polymers","authors":"S. A. Orlova,&nbsp;T. V. Khokhlova,&nbsp;O. I. Tuzhikov,&nbsp;O. O. Tuzhikov,&nbsp;I. V. Lavnikova","doi":"10.1134/S0040579523050251","DOIUrl":"10.1134/S0040579523050251","url":null,"abstract":"<p>The oxidative dehydropolycondensation of aniline production waste with up to 30 wt % free aniline with ammonium persulfate or potassium bichromate has been studied. The effects of the component ratio and synthesis conditions on the product yield were examined. The product composition was analyzed by IR spectroscopy. The polymers obtained from potassium bichromate were shown to be characterized by electric conductivity.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1104 - 1110"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of a Nanotechnogenic Aluminoalkaline Sludge on the Phase Composition, Physicomechanical, and Chemical Characteristics of Earthquake-Proof Brick 纳米氧化铝碱性污泥对抗震砖的相组成、物理力学和化学特性的影响
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050020
E. S. Abdrahimova, V. Z. Abdrahimov
{"title":"The Effect of a Nanotechnogenic Aluminoalkaline Sludge on the Phase Composition, Physicomechanical, and Chemical Characteristics of Earthquake-Proof Brick","authors":"E. S. Abdrahimova,&nbsp;V. Z. Abdrahimov","doi":"10.1134/S0040579523050020","DOIUrl":"10.1134/S0040579523050020","url":null,"abstract":"<p>An earthquake-resistant brick of M150–M175 grade is obtained from a low-alumina (Al<sub>2</sub>O<sub>3</sub>) &lt; 15%) fusible clay and a high-alumina (Al<sub>2</sub>O<sub>3</sub> &gt; 60%) nanotechnogenic aluminoalkaline sludge. The use of the aluminoalkaline sludge even in the amount of 20% enhances the performance characteristics of the ceramic brick to the M125 grade; the optimum amount of the aluminoalkaline sludge to be used is at most 30%. The crystallization of hematite, anorthite, diopside, and crystobalite is observed when the temperature of burning of the ceramic samples is 1000°C. The increase in the burning temperature to 1050°C results in no specific changes, except for an increase in the content of crystobalite, anorthite, glass phase, and diopside. A further increase in the temperature of burning of the aseismic brick to 1100°C favors the emergence of mullite, which increases the main physicomechanical and chemical characteristics of the aseismic brick.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1025 - 1030"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of the Anticancer Activity of the Fullerene Nanostructure’s Derivatives: DFT Calculations 富勒烯纳米结构衍生物的抗癌活性预测：DFT 计算
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S004057952305038X
Hafida Chemouri, Nadjet Deddouche, Mohammed El Amine Zair, Hassina Derbal Habak
{"title":"Prediction of the Anticancer Activity of the Fullerene Nanostructure’s Derivatives: DFT Calculations","authors":"Hafida Chemouri,&nbsp;Nadjet Deddouche,&nbsp;Mohammed El Amine Zair,&nbsp;Hassina Derbal Habak","doi":"10.1134/S004057952305038X","DOIUrl":"10.1134/S004057952305038X","url":null,"abstract":"<p>In this work, the [2 + 2] cycloaddition of fullerenes with the carcinogen BaPe was examined using the DFT method, with the aim of inhibiting the carcinogenic process of the latter. The increase in the electrophilic character of the reagents by the functionalization with electron-withdrawing groups was shown. By the functionalization of C<sub>60</sub>, an increase in the dipole moment and consequently in the solubility of these reagents was shown. Also, a significant improvement in this solubility for these reagents by the [2 + 2] cycloaddition with BaPe increasing the dipole moment was noted. The most favored electrophilic-nucleophilic interaction between C2 and C3 has been rationalized. In the gaseous phase, very asynchronous concerted mechanisms by functionalization were demonstrated for this type of fullerene cycloaddition. In addition, an insufficiency of the calculations for the prediction of the inhibition of the mutagenic process by forming the C<sub>60</sub>CONH<sub>2</sub>–2.5BaPe complex (the major product) was noted and therefore the inclusion of the effects of biological solvent (water) was mandatory. In the presence of water, a significant decrease in the activation barriers and reaction energies compared to those of the gaseous phase was shown, therefore, a kinetic and thermodynamic preference of the C<sub>60</sub>CONH<sub>2</sub>–2.5BaPe complex from this cycloaddition, is deduced.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"876 - 888"},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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