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Theoretical Foundations of Chemical Engineering最新文献

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Method for Obtaining Aqueous Colloidal Dispersions of Magnetically Sensitive Polymer Microspheres Resistant to Organic Solvents 获得耐有机溶剂的磁敏聚合物微球水性胶体分散体的方法
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700568
V. V. Spiridonov, A. R. Lukmanova, A. V. Akopyan, A. V. Anisimov, A. A. Yaroslavov
{"title":"Method for Obtaining Aqueous Colloidal Dispersions of Magnetically Sensitive Polymer Microspheres Resistant to Organic Solvents","authors":"V. V. Spiridonov,&nbsp;A. R. Lukmanova,&nbsp;A. V. Akopyan,&nbsp;A. V. Anisimov,&nbsp;A. A. Yaroslavov","doi":"10.1134/S0040579524700568","DOIUrl":"10.1134/S0040579524700568","url":null,"abstract":"<div><p>A method for synthesizing magnetic polymer microspheres with carboxyl groups on the surface is proposed. In an aqueous medium, magnetic microspheres form stable colloidal dispersions with an average hydrodynamic particle diameter of 110–170 nm and a negative surface charge. When dispersed in an aqueous–organic mixture, the microspheres remain resistant to aggregation. Microspheres can be extracted from the dispersion using an external magnetic field. Magnetic microspheres can be used as supports for heterogeneous catalysts operating in organic media.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"341 - 345"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826323","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
New Azo Dyes Based on 2-Methylresorcinol for Polycaproamide Fibers 用于聚己酰胺纤维的基于 2-甲基间苯二酚的新型偶氮染料
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700143
V. V. Meleshenkova, D. N. Kuznetsov, E. B. Karavaeva, K. I. Kobrakov
{"title":"New Azo Dyes Based on 2-Methylresorcinol for Polycaproamide Fibers","authors":"V. V. Meleshenkova,&nbsp;D. N. Kuznetsov,&nbsp;E. B. Karavaeva,&nbsp;K. I. Kobrakov","doi":"10.1134/S0040579524700143","DOIUrl":"10.1134/S0040579524700143","url":null,"abstract":"<div><p><b>Abstract</b>—Information is provided on the synthesis of mono-azo compounds with 60–97% yields by the azo coupling reaction of 2-methylresorcinol with aryldiazonium salts of various structures. The synthesized mono-azo compounds are tested as acid and disperse dyes for dyeing of textile materials made of polycaproamide fibers. The results of research of color fastness to washing, sweat, and light show good operational properties of coloring. Conclusions on the dependence of color fastness on the structure of the studied azo compounds are made.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"65 - 70"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826364","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
Effects of Desilication Conditions on the Formation of Wollastonite during the Autoclave Leaching of Silica–Titanium Concentrates
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700192
Yu. V. Zablotskaya, G. B. Sadykhov, A. S. Tuzhilin, T. V. Olyunina
{"title":"Effects of Desilication Conditions on the Formation of Wollastonite during the Autoclave Leaching of Silica–Titanium Concentrates","authors":"Yu. V. Zablotskaya,&nbsp;G. B. Sadykhov,&nbsp;A. S. Tuzhilin,&nbsp;T. V. Olyunina","doi":"10.1134/S0040579524700192","DOIUrl":"10.1134/S0040579524700192","url":null,"abstract":"<div><p>The dissolution of quartz during the hydrometallurgical desilication of silica–titanium concentrates from Pizhemskoe field (Komi Republic) was studied. The concentrate desilication occurs in the CaO–SiO<sub>2</sub>–Na<sub>2</sub>O–H<sub>2</sub>O system due to the binding of silica into calcium silicate hydrate, in particular, into CaO·SiO<sub>2</sub>·<i>n</i>H<sub>2</sub>O. The main factors (temperature, duration, CaO : SiO<sub>2</sub> ratio, NaOH content) governing the extent of concentrate desilication and crystallization of wollastonite from calcium silicate hydrates resulting from the reaction were determined.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"95 - 100"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826268","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
Controlled-Release Fertilizers—A New Development in the Fertilizer Market (a Review)
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700477
V. M. Fufaeva, Yu. A. Taran, V. O. Strel’nikova
{"title":"Controlled-Release Fertilizers—A New Development in the Fertilizer Market (a Review)","authors":"V. M. Fufaeva,&nbsp;Yu. A. Taran,&nbsp;V. O. Strel’nikova","doi":"10.1134/S0040579524700477","DOIUrl":"10.1134/S0040579524700477","url":null,"abstract":"<div><p>The review shows the relevance and advantages of application of controlled-release fertilizers and describes their production methods and practical implementations. A classification method developed by the authors is proposed, and the main properties and quality control indicators for such fertilizer products are determined.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"287 - 294"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826472","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
Inhibition of Spontaneous Polymerization during the Synthesis of Epoxyacrylic Oligomer 环氧丙烯酸低聚物合成过程中的自发聚合抑制作用
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700180
N. S. Petrov, O. E. Babkin, V. V. Il’ina
{"title":"Inhibition of Spontaneous Polymerization during the Synthesis of Epoxyacrylic Oligomer","authors":"N. S. Petrov,&nbsp;O. E. Babkin,&nbsp;V. V. Il’ina","doi":"10.1134/S0040579524700180","DOIUrl":"10.1134/S0040579524700180","url":null,"abstract":"<div><p>The results of studies on the inhibition of uncontrolled side reactions during the synthesis of epoxyacrylate oligomer from epoxydiane resin ED-20 and acrylic acid are presented. The factors governing the esterification of ED-20 with acrylic acid were studied. The efficiency of using <i>p</i>-methoxyphenol as an inhibitor of side reactions during the synthesis of epoxyacrylate oligomer was examined, and its optimum amount was determined.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"90 - 94"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826269","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 Efficiency of Using an Electrochemical Module to Generate Ferrates while Treating Wastewater from Meat Processing Plants
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700775
S. Yu. Kireev, V. N. Shtepa, S. N. Kireeva, A. V. Kozyr’, A. B. Shikunets, L. V. Naumov
{"title":"Study of the Efficiency of Using an Electrochemical Module to Generate Ferrates while Treating Wastewater from Meat Processing Plants","authors":"S. Yu. Kireev,&nbsp;V. N. Shtepa,&nbsp;S. N. Kireeva,&nbsp;A. V. Kozyr’,&nbsp;A. B. Shikunets,&nbsp;L. V. Naumov","doi":"10.1134/S0040579524700775","DOIUrl":"10.1134/S0040579524700775","url":null,"abstract":"<div><p>A complex electrochemical technology for treating wastewater from a meat processing plant is described. During the water treatment process, sequential treatment occurs in an electrochemical module with a graphite anode and an electrochemical module with an iron anode, as well as holding in a maturation and averaging chamber. It has been proven that in the module with an iron anode, ferrates are generated, which simultaneously perform the functions of a soft oxidizer, coagulant, and steel corrosion inhibitor.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"469 - 474"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826453","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
Adsorption Accumulation of Natural Methane Gas
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700490
A. A. Pribylov, A. A. Fomkin, A. B. Shkolin, I. E. Menshchikov
{"title":"Adsorption Accumulation of Natural Methane Gas","authors":"A. A. Pribylov,&nbsp;A. A. Fomkin,&nbsp;A. B. Shkolin,&nbsp;I. E. Menshchikov","doi":"10.1134/S0040579524700490","DOIUrl":"10.1134/S0040579524700490","url":null,"abstract":"<p>Using the method of thermochemical activation of wood-processing waste in H<sub>3</sub>PO<sub>4</sub> at 1173 K, a microporous carbon adsorbent EC-103 (1) is obtained with a specific micropore volume of <i>W</i><sub>0</sub> = 0.80 cm<sup>3</sup>/g, a micropore width of <i>X</i><sub>0</sub> = 1.32 nm, and a specific surface area of <i>S</i><sub>BET</sub> = 2115 m<sup>2</sup>/g. At 303 K and 20 MPa, the adsorption activity of the adsorbent reaches ~22 wt % for methane. The volumetric density of adsorbed methane on the compacted adsorbent EC-103 (1) with a binder at a pressure of 10 MPa reaches ~200 nm<sup>3</sup>/m<sup>3</sup>.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"300 - 302"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826474","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
Rational Technology for Separation of Rare Earth Elements Isolated from Monazite 从独居石中分离稀土元素的合理技术
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700702
A. V. Val’kov, E. A. Anan’eva, V. I. Petrov
{"title":"Rational Technology for Separation of Rare Earth Elements Isolated from Monazite","authors":"A. V. Val’kov,&nbsp;E. A. Anan’eva,&nbsp;V. I. Petrov","doi":"10.1134/S0040579524700702","DOIUrl":"10.1134/S0040579524700702","url":null,"abstract":"<div><p>The behavior of actinium-227 and actinium-228 in the life cycle of monazite processing is considered. The recommended system for separation of actinium-227 and actinium-228 is 90–100% TBP–300–350 g/dm<sup>3</sup> of Ln(NO<sub>3</sub>)<sub>3</sub>–0.1–0.5 mol/dm<sup>3</sup> of HNO<sub>3</sub>. The process is combined: actinium-227 and actinium-228 are removed simultaneously with purification from rare earth impurities, iron, aluminum, calcium, and phosphate ions occurs. If monazite does not contain uranium, it is recommended to hold the rare earth concentrate (solution or carbonates) after separation of thorium for 1–2 days. A process flow chart for separation of the sum of REEs isolated from monazite is proposed, with production of didymium, lanthanum–cerium concentrate, and yttrium REE concentrate.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"425 - 431"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826057","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
Preparation of Bismuth Subsalicylate from Bismuth Subnitrate
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700155
E. S. Koledova, Yu. M. Yukhin
{"title":"Preparation of Bismuth Subsalicylate from Bismuth Subnitrate","authors":"E. S. Koledova,&nbsp;Yu. M. Yukhin","doi":"10.1134/S0040579524700155","DOIUrl":"10.1134/S0040579524700155","url":null,"abstract":"<div><p>It was shown that bismuth subsalicylate BiC<sub>7</sub>H<sub>5</sub>O<sub>4</sub> of high purity (with low contents of impurity metals and nitrate ions) is advisable to obtain from bismuth subnitrate [Bi<sub>6</sub>O<sub>5</sub>(OH)<sub>3</sub>](NO<sub>3</sub>)<sub>5</sub>⋅3H<sub>2</sub>O through converting it into oxide Bi<sub>2</sub>O<sub>3</sub> by treating with a solution of sodium hydroxide and then into bismuth subsalicylate BiC<sub>7</sub>H<sub>5</sub>O<sub>4</sub> by treating bismuth oxide with a lactic acid–salicylic acid solution at a temperature of 60–85°C.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"71 - 75"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826367","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 Use of Mixtures of Extractants for the Recovery and Separation of Rare Earth Elements 使用混合萃取剂回收和分离稀土元素
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700714
V. V. Belova, A. I. Khol’kin
{"title":"The Use of Mixtures of Extractants for the Recovery and Separation of Rare Earth Elements","authors":"V. V. Belova,&nbsp;A. I. Khol’kin","doi":"10.1134/S0040579524700714","DOIUrl":"10.1134/S0040579524700714","url":null,"abstract":"<div><p>A review was made of the literature data published in Russia and abroad over the past ten years on the extraction of rare earth elements (REEs) with binary mixtures of extractants of various classes. It was noted that high values of REE separation coefficients are in the most cases achieved by increasing the selectivity of the extractant mixtures used due to the formation of complexes of mixed composition in the organic phase. In addition, in some systems with mixtures of extractants, the processes of stripping metals from the organic phase are facilitated.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"432 - 437"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826058","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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