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Oxide Films Produced by the Extraction–Pyrolytic Method with Different Transmission and Absorption Characteristics in the UV Range 采用萃取-热解方法生产的氧化物薄膜在紫外线范围内具有不同的透射和吸收特性
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700118
N. N. Khrapko, T. N. Patrusheva, S. V. Myakin
{"title":"Oxide Films Produced by the Extraction–Pyrolytic Method with Different Transmission and Absorption Characteristics in the UV Range","authors":"N. N. Khrapko,&nbsp;T. N. Patrusheva,&nbsp;S. V. Myakin","doi":"10.1134/S0040579524700118","DOIUrl":"10.1134/S0040579524700118","url":null,"abstract":"<div><p>The work studied the UV–visible transparency of oxide films of ZrO<sub>2</sub>, CuO, TiO<sub>2</sub>, Y<sub>2</sub>O<sub>3</sub>, ZnO, and NiO of various thicknesses on quartz glass, which were obtained by the extraction–pyrolytic method at a pyrolysis temperature of 500°C and a crystallization temperature of 700°C. The results of studying the optical properties of the produced samples showed the possibility of obtaining coatings that provide both a decrease and an increase in transparency in various regions of the UV radiation.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"48 - 53"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826363","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
Aerobic Oxidation of Organosulfur Compounds in the Presence of Fe3O4 Nanoparticles 有机硫化合物在 Fe3O4 纳米颗粒存在下的有氧氧化作用
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700532
A. V. Akopyan, N. N. Grishin, S. V. Kardashev, E. A. Yeseva, A. V. Anisimov
{"title":"Aerobic Oxidation of Organosulfur Compounds in the Presence of Fe3O4 Nanoparticles","authors":"A. V. Akopyan,&nbsp;N. N. Grishin,&nbsp;S. V. Kardashev,&nbsp;E. A. Yeseva,&nbsp;A. V. Anisimov","doi":"10.1134/S0040579524700532","DOIUrl":"10.1134/S0040579524700532","url":null,"abstract":"<div><p><b>Abstract</b>—Aerobic oxidation of organosulfur compounds of petroleum origin by atmospheric oxygen was performed using a heterogeneous catalyst in the form of Fe<sub>3</sub>O<sub>4</sub> nanoparticles. By studying the oxidation of model mixtures (a solution of dibenzothiophene in decalin), the following conditions for the complete oxidation of dibenzothiophene were selected: catalyst weight, 1 mg; temperature 130°C; and time, 180 min. The catalyst remains active throughout five oxidation cycles. Physicochemical studies showed that the phase composition and structure of the catalyst persist after the regeneration stage.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"323 - 329"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826321","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
Static Optimization of the Process of Separation of Marketable Ethylene from Pyrolysis Products in a Multi-Column Rectification Unit 静态优化多柱精馏装置中从热解产品中分离可销售乙烯的过程
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700799
V. P. Krivosheev, A. A. Tumaev, I. M. Efimov, P. V. Sitnik
{"title":"Static Optimization of the Process of Separation of Marketable Ethylene from Pyrolysis Products in a Multi-Column Rectification Unit","authors":"V. P. Krivosheev,&nbsp;A. A. Tumaev,&nbsp;I. M. Efimov,&nbsp;P. V. Sitnik","doi":"10.1134/S0040579524700799","DOIUrl":"10.1134/S0040579524700799","url":null,"abstract":"<p>In the article the method of stage-by-stage optimization of static regimes of rectification columns in five-column system of separation of marketable ethylene from pyrolysis products is considered. The essence of the method is to calculate each of the columns of the system by a private problem in the form of maximizing the flow rate of the product stream, carrying in ethylene of a given concentration. Concentrations of ethylene in product streams of columns, except for given concentration in outlet stream, have been determined by simulation to obtain convergence of static mode calculation of system in given range of supply rate variation. Upon completion of the calculation, the total heat consumption for all columns of the unit and the specific heat consumption for the finished product are calculated.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"480 - 487"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826455","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
Extraction Separation of Molybdenum by Means of CYANEX®600 from Solutions for Nitric Acid Leaching of Industrial Products 用CYANEX®600从工业产品的硝酸浸出溶液中提取分离钼
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700271
L. M. Karimova, T. O. Oleinikova, I. V. Terent’eva
{"title":"Extraction Separation of Molybdenum by Means of CYANEX®600 from Solutions for Nitric Acid Leaching of Industrial Products","authors":"L. M. Karimova,&nbsp;T. O. Oleinikova,&nbsp;I. V. Terent’eva","doi":"10.1134/S0040579524700271","DOIUrl":"10.1134/S0040579524700271","url":null,"abstract":"<div><p>The extraction of molybdenum from a multicomponent nitric acid productive solution with various values of the redox potential using extractant CYANEX®600 (Solvay company) and diluent Elixore 205 (Total company) is studied. Extraction curves are constructed and the process of molybdenum extraction from nitrate leaching solutions is simulated using the Minchem software package from Solvay. The number of extraction stages necessary to achieve an extraction efficiency of more than 95% is selected, which is found to be equal to two stages with phase ratios (Org/Aq) of 1.5 : 1 and 1 : 1 for an extractant concentration of 25%. It is established that the degree of extraction of molybdenum at the extraction stages with reduced values of the redox potential of the productive solution increases from 68.64 to 97.36%.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"152 - 158"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826248","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
Extraction of Carboxylic Acids with Binary Extractants and Bifunctional Ionic Liquids 二元萃取剂和双功能离子液体萃取羧酸
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700489
V. V. Belova, A. I. Khol’kin
{"title":"Extraction of Carboxylic Acids with Binary Extractants and Bifunctional Ionic Liquids","authors":"V. V. Belova,&nbsp;A. I. Khol’kin","doi":"10.1134/S0040579524700489","DOIUrl":"10.1134/S0040579524700489","url":null,"abstract":"<div><p>A brief review was made of literature data on the extraction of carboxylic acids with binary extractants and hydrophobic bifunctional ionic liquids. It was noted that the carboxylic acids in systems with these extractants are distributed mainly by ion pairing and hydrogen bonding. An important advantage of these extraction systems is the ability to effectively recover carboxylic acids from dilute aqueous solutions. An analysis of literature data showed the promise of using binary extractants and hydrophobic bifunctional ionic liquids for the recovery and separation of carboxylic acids.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"295 - 299"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826473","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 Rehydration Conditions on the Physicochemical Properties of Reduced Layered Double Hydroxides of Magnesium and Aluminum 再水化条件对镁铝还原层状双氢氧化物理化性质的影响
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700106
D. V. Maiorov, E. K. Kopkova
{"title":"Effect of Rehydration Conditions on the Physicochemical Properties of Reduced Layered Double Hydroxides of Magnesium and Aluminum","authors":"D. V. Maiorov,&nbsp;E. K. Kopkova","doi":"10.1134/S0040579524700106","DOIUrl":"10.1134/S0040579524700106","url":null,"abstract":"<div><p>Using the method of solid-phase reaction of AlCl<sub>3</sub>·6H<sub>2</sub>O and MgCl<sub>2</sub>·6H<sub>2</sub>O with (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> at room temperature, a Mg–Al layered hydroxide with composition Mg<sub>4</sub>Al<sub>2</sub>(OH)<sub>12</sub>CO<sub>3</sub>·3.85H<sub>2</sub>O with the structure of hydrotalcite is obtained. The results of determining the effect of rehydration conditions on the structural and surface properties of layered reduced double hydroxides (LDHs) of magnesium and aluminum are described. It is shown that the samples obtained by reduction of thermally treated initial Mg–Al LDH for 2 h (regardless of the pH of the medium) have specific surface-area parameters (both total area and outer surface area) that are not different from those of the initial LDH sample, and their specific pore volume increases by a factor of 1.3–1.5 (from 0.121 to 0.159–0.183 cm<sup>3</sup>/g). It is established that the pH of the isoionic point of the rehydrated Mg–Al LDH samples depends only slightly on the rehydration conditions and equals 9.7 ± 9%, which suggests a high sorption capacity of both synthesized and rehydrated Mg–Al LDH samples with respect to nonferrous metal ions.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"41 - 47"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826438","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
Anticorrosion Hydroxyapatite-Containing Coatings for the Functionalization of Bioresorbable Magnesium Alloys 用于生物可吸收镁合金功能化的含羟基磷灰石防腐涂层
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700416
A. S. Gnedenkov, S. L. Sinebryukhov, V. S. Filonina, S. V. Gnedenkov
{"title":"Anticorrosion Hydroxyapatite-Containing Coatings for the Functionalization of Bioresorbable Magnesium Alloys","authors":"A. S. Gnedenkov,&nbsp;S. L. Sinebryukhov,&nbsp;V. S. Filonina,&nbsp;S. V. Gnedenkov","doi":"10.1134/S0040579524700416","DOIUrl":"10.1134/S0040579524700416","url":null,"abstract":"<div><p>A biocompatible protective coating is formed by plasma electrolytic oxidation (PEO) on the bioresorbable Mg–0.8Ca magnesium alloy. The electrochemical properties and bioresorption mechanism are established for the material, suggesting a model for the process of biodegradation in the alloy with a hydroxyapatite-containing PEO coating in the cultivation medium of mammalian cells.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"250 - 260"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826459","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
Implementation of an Integrated Technology for Processing Brines of the Calcium Chloride Type to Obtain a Bromineless Lithium Concentrate 采用综合技术处理氯化钙盐水以获得无溴锂精矿
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700635
A. D. Ryabtsev, N. P. Kotsupalo, L. T. Menzheres, A. A. Kurakov, N. M. Nemkov
{"title":"Implementation of an Integrated Technology for Processing Brines of the Calcium Chloride Type to Obtain a Bromineless Lithium Concentrate","authors":"A. D. Ryabtsev,&nbsp;N. P. Kotsupalo,&nbsp;L. T. Menzheres,&nbsp;A. A. Kurakov,&nbsp;N. M. Nemkov","doi":"10.1134/S0040579524700635","DOIUrl":"10.1134/S0040579524700635","url":null,"abstract":"<div><p>The structural features of halide varieties in an analogous series of double compounds of aluminum and lithium are studied. The possibility of transition of a bromine-containing version of the double compound of aluminum and bromine into a lithium concentrate is shown. Methods are found for preparing a lithium concentrate without bromine admixture. After bromine is industrially removed, the resulting lithium concentrate is used to obtain the following lithium products: lithium carbonate and lithium hydroxide monohydrate. In an integrated scheme, magnesium hydroxide after separating bromine and lithium products is precipitated to produce a calcium chloride solution.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"386 - 390"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826050","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
Localization of the Products of Gas Conversion of the Tokem-308 Resin Tokem-308 树脂气体转化产物的定位
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700520
S. A. Kulyukhin, A. V. Gordeev, A. F. Seliverstov, A. Yu. Kazberova, E. P. Krasavina, Yu. M. Nevolin
{"title":"Localization of the Products of Gas Conversion of the Tokem-308 Resin","authors":"S. A. Kulyukhin,&nbsp;A. V. Gordeev,&nbsp;A. F. Seliverstov,&nbsp;A. Yu. Kazberova,&nbsp;E. P. Krasavina,&nbsp;Yu. M. Nevolin","doi":"10.1134/S0040579524700520","DOIUrl":"10.1134/S0040579524700520","url":null,"abstract":"<div><p><b>Abstract</b>—The chemical compounds formed during the dissolution of the products of gas-phase conversion of the Tokem-308 cationite (analog of KU-2x8) in an HNO<sub>3</sub>(vapor)–air atmosphere, obtained by vaporization of 12 M HNO<sub>3</sub>, in H<sub>2</sub>O and 0.045 and 0.5 M NaOH solutions were studied. Ozonation of the alkaline solutions of the products was studied for utilization of the latter. The sequence of procedures including gas-phase treatment in the HNO<sub>3</sub>(vapor)–air atmosphere and dissolution in NaOH followed by ozonation makes it possible to obtain alkaline solutions almost without any toxic aromatic impurities, due to which the solutions are suitable for safe disposal.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"316 - 322"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826319","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
Filter Replacement Modes for Respirators Protecting Workers from Exposure to Industrial Gases (Review) 保护工人免于接触工业气体的呼吸器的过滤器更换模式（综述）
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700374
V. A. Kaptsov, V. B. Pankova
{"title":"Filter Replacement Modes for Respirators Protecting Workers from Exposure to Industrial Gases (Review)","authors":"V. A. Kaptsov,&nbsp;V. B. Pankova","doi":"10.1134/S0040579524700374","DOIUrl":"10.1134/S0040579524700374","url":null,"abstract":"<div><p>Replacing gas-mask filters based on the workers’ subjective assessment of the smell of gas in the mask has proven to be unreliable and is not practiced in developed countries. To prevent acute poisoning and chronic occupational diseases, it is necessary to determine the service life of filters and replace them on a schedule. Lifetime sensors (ESLI) have not become widespread.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"224 - 232"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826253","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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