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Theoretical Foundations of Chemical Engineering最新文献

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Adsorption of Lithium from Aqueous Solutions by Layered Double Magnesium Aluminum Hydroxide 层状双氢氧化镁对水溶液中锂的吸附研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700417
D. V. Maiorov, S. V. Drogobuzhskaya
{"title":"Adsorption of Lithium from Aqueous Solutions by Layered Double Magnesium Aluminum Hydroxide","authors":"D. V. Maiorov,&nbsp;S. V. Drogobuzhskaya","doi":"10.1134/S0040579526700417","DOIUrl":"10.1134/S0040579526700417","url":null,"abstract":"<p><b>Abstract</b>—The Li<sup>+</sup> ion sorption properties of layered double magnesium aluminum hydroxide Mg<sub>4</sub>Al<sub>2</sub>(OH)<sub>12</sub>CO<sub>3</sub>⋅3H<sub>2</sub>O obtained by solid-phase synthesis were studied. The influence of pH and salt composition of solutions on the sorption capacity of the sorbent was investigated. The adsorption monolayer capacities and adsorption equilibrium constants of the synthesized and heat-treated layered double magnesium aluminum hydroxide samples were determined. It was shown that the sorption process is described by a pseudo-second-order kinetic model and occurs under mixed diffusion control.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"263 - 269"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098503","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
Effect of Temperature Conditions of Heat Treatment on the Mechanical Properties of Basalt Fiber Composite Material 热处理温度条件对玄武岩纤维复合材料力学性能的影响
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700557
S. V. Fomichev, E. I. Berbekova, E. N. Pechonkina, V. A. Krenev, M. A. Kaplan, A. G. Kolmakov
{"title":"Effect of Temperature Conditions of Heat Treatment on the Mechanical Properties of Basalt Fiber Composite Material","authors":"S. V. Fomichev,&nbsp;E. I. Berbekova,&nbsp;E. N. Pechonkina,&nbsp;V. A. Krenev,&nbsp;M. A. Kaplan,&nbsp;A. G. Kolmakov","doi":"10.1134/S0040579526700557","DOIUrl":"10.1134/S0040579526700557","url":null,"abstract":"<p><b>Abstract</b>—Laboratory samples were obtained by mixing two fractions of crushed gabbro rock with different particle sizes in the coarse:fine ratio of 1 : 10 and chopped basalt fibers in an amount of 8 wt % of the original mass of the mixture. The binder was potassium liquid glass. The resulting mass was placed in a mold and was pressing to form blanks. The sintered samples had a cylindrical shape with dimensions <i>h</i> × <i>d</i> = 10 × 10 mm. For all samples, the following parameters were determined: pycnometric density, Brinell hardness, Ultimate compressive strength, compressive yield strength, and compression set.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"329 - 331"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098631","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
Analytical Calculation of a Condenser Taking into Account the Longitudinal Thermal Conductivity of the Liquid Being Heated 考虑被加热液体纵向导热系数的冷凝器解析计算
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700673
A. B. Golovanchikov, N. A. Prokhorenko, N. A. Merentsov
{"title":"Analytical Calculation of a Condenser Taking into Account the Longitudinal Thermal Conductivity of the Liquid Being Heated","authors":"A. B. Golovanchikov,&nbsp;N. A. Prokhorenko,&nbsp;N. A. Merentsov","doi":"10.1134/S0040579526700673","DOIUrl":"10.1134/S0040579526700673","url":null,"abstract":"<p><b>Abstract</b>—Using the differential equations of heat balance and heat transfer, taking into account the longitudinal thermal conductivity of the liquid being heated, mathematical modeling was performed for the numerical calculation of a shell-and-tube heat exchanger of the condenser–heater type, which required a thousand or more iterations for double numerical integration of a second-order inhomogeneous differential equation under special Danckwerts boundary conditions. It was shown that such complex numerical calculations can be replaced by an analytical calculation using a simple algebraic equation describing the dependence of the temperature of the liquid being heated in the tubes on their length.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"413 - 420"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098446","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
Investigation of Processing of Copper–Molybdenum Concentrator Tailings for Recovery of Valuable Components 铜钼选矿厂尾矿处理回收有价成分的研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700533
A. G. Arustamyan, A. A. Hakobyan, E. S. Aghamyan, A. M. Arakelyan, M. S. Sargsyan, D. S. Mazmanyan, E. M. Nazaryan
{"title":"Investigation of Processing of Copper–Molybdenum Concentrator Tailings for Recovery of Valuable Components","authors":"A. G. Arustamyan,&nbsp;A. A. Hakobyan,&nbsp;E. S. Aghamyan,&nbsp;A. M. Arakelyan,&nbsp;M. S. Sargsyan,&nbsp;D. S. Mazmanyan,&nbsp;E. M. Nazaryan","doi":"10.1134/S0040579526700533","DOIUrl":"10.1134/S0040579526700533","url":null,"abstract":"<p>The processing of copper–molybdenum concentrator tailings by low-temperature roasting with NaOH, followed by leaching and filtration to produce sodium metasilicate, was studied. The aluminum-enriched concentrate is treated with a dilute HNO<sub>3</sub> solution. The resulting aluminum salt filtrate is processed into alumina or other aluminum compounds using established methods. The remaining solid residue can be used as a raw material for the production of construction materials.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"318 - 321"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098451","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 Influence of Slag from Ferrotitanium Smelting on the Chemical Resistance of Acid-Resistant Materials 钛铁冶炼渣对耐酸材料耐化学性的影响
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700545
V. Z. Abdrakhimov
{"title":"The Influence of Slag from Ferrotitanium Smelting on the Chemical Resistance of Acid-Resistant Materials","authors":"V. Z. Abdrakhimov","doi":"10.1134/S0040579526700545","DOIUrl":"10.1134/S0040579526700545","url":null,"abstract":"<p><b>Abstract</b>—Studies showed that chemical media most strongly destroy materials containing increased amounts of iron oxides together with alkali oxides (Σ = Fe<sub>2</sub>O<sub>3</sub> + R<sub>2</sub>O) and least strongly decompose materials containing increased amounts of aluminum oxide (corundum) and spinel (Σ = Al<sub>2</sub>O<sub>3</sub> + MgAl<sub>2</sub>O<sub>4</sub>), with the latter having a service life 1.3–1.5 times longer.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"322 - 328"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098524","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 Concentrating Micro- and Nanogold in Refractory Sulfide Ores 难选硫化矿石中微金和纳米金富集可能性的研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700636
E. E. Dmitrieva, S. I. Ivannikov, V. P. Molchanov, M. A. Medkov
{"title":"Study of the Possibility of Concentrating Micro- and Nanogold in Refractory Sulfide Ores","authors":"E. E. Dmitrieva,&nbsp;S. I. Ivannikov,&nbsp;V. P. Molchanov,&nbsp;M. A. Medkov","doi":"10.1134/S0040579526700636","DOIUrl":"10.1134/S0040579526700636","url":null,"abstract":"<p>The possibility of concentrating gold in refractory gold-bearing arsenic ores from the Sukhoe deposit by decomposition with ammonium bifluoride and ammonium sulfate was investigated. Treatment of sulfide minerals with a mixture of ammonium bifluoride and ammonium sulfate increased the gold concentration by more than 700-fold, creating the prerequisites for its subsequent recovery. An approach to the quantitative determination of gold and arsenic by <sup>252</sup>Cf-INAA was developed.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"381 - 386"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149097995","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
Development of a Method for Clarification of Triuranium Disilicide Spent Nuclear Fuel Solutions Using a Modified Contact Filter 用改进的接触过滤器澄清二硅化三铀乏燃料溶液方法的发展
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700600
M. N. Medvedev, V. I. Volk, L. N. Podrezova, S. V. Artobolevskii
{"title":"Development of a Method for Clarification of Triuranium Disilicide Spent Nuclear Fuel Solutions Using a Modified Contact Filter","authors":"M. N. Medvedev,&nbsp;V. I. Volk,&nbsp;L. N. Podrezova,&nbsp;S. V. Artobolevskii","doi":"10.1134/S0040579526700600","DOIUrl":"10.1134/S0040579526700600","url":null,"abstract":"<p>The possibility of clarifying solutions simulating spent uranium silicide nuclear fuel using a self-regulating contact filter was demonstrated for the first time. Optimum filtration and regeneration conditions were determined, and recommendations for the design of the process flow diagram of the clarification unit were proposed.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"358 - 361"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098060","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
Anti-Icing Compositions Based on Urea and Ethanol 基于尿素和乙醇的防冰组合物
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700430
E. A. Frolova, D. F. Kondakov
{"title":"Anti-Icing Compositions Based on Urea and Ethanol","authors":"E. A. Frolova,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579526700430","DOIUrl":"10.1134/S0040579526700430","url":null,"abstract":"<p><b>Abstract</b>—Phase equilibria in sections of the CO(NH<sub>2</sub>)<sub>2</sub>–C<sub>2</sub>H<sub>5</sub>OH–H<sub>2</sub>O system at temperatures below zero degrees Celsius were studied. It was found that the addition of ethanol to the urea–water system leads to the formation of low‑temperature eutectics with crystallization temperatures down to –34°C, which substantially extends the temperature range of urea’s application as an anti‑icing material. The discovered compositions are promising for the development of new anti‑icing materials based on them.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"277 - 279"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098504","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
Phase Equilibria in Cross-Sections of the Urea–Isopropanol–Water System at Subzero Temperatures 低温下尿素-异丙醇-水体系截面的相平衡
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700454
E. A. Frolova, D. F. Kondakov
{"title":"Phase Equilibria in Cross-Sections of the Urea–Isopropanol–Water System at Subzero Temperatures","authors":"E. A. Frolova,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579526700454","DOIUrl":"10.1134/S0040579526700454","url":null,"abstract":"<p><b>Abstract</b>—Phase equilibria in sections of the CO(NH<sub>2</sub>)<sub>2</sub>–C<sub>2</sub>H<sub>5</sub>OH–H<sub>2</sub>O system at temperatures below zero degrees Celsius were studied. It was found that the addition of ethanol to the urea–water system leads to the formation of low‑temperature eutectics with crystallization temperatures down to –26°C, which substantially extends the temperature range of urea’s application as an anti‑icing material. The discovered compositions are promising for the development of new anti‑icing materials based on them.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"283 - 285"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098505","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
Service Life of a Hydrodynamic Filter during Removal of Mechanical Impurities from Rheologically Complex Liquids 从流变复杂液体中去除机械杂质时流体动力过滤器的使用寿命
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700661
V. A. Devisilov, N. P. Frolov
{"title":"Service Life of a Hydrodynamic Filter during Removal of Mechanical Impurities from Rheologically Complex Liquids","authors":"V. A. Devisilov,&nbsp;N. P. Frolov","doi":"10.1134/S0040579526700661","DOIUrl":"10.1134/S0040579526700661","url":null,"abstract":"<p>The service life of a filter is determined by the rate of pressure drop increase caused by cake formation. Analytical calculation of this process is difficult for rheologically complex liquids. A model based on the numerical solution of the Navier–Stokes equations in ANSYS CFX was proposed to predict pressure variation. Experiments confirmed the applicability of this approach for simulating the process.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"403 - 412"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098628","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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