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Theoretical Foundations of Chemical Engineering最新文献

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Development of a Sorbent Based on Chitosan and Vermiculite for Textile Wastewater Treatment 为纺织废水处理开发基于壳聚糖和蛭石的吸附剂
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700544
G. A. Ikhtiyarova, S. M. Turabdzhanov
{"title":"Development of a Sorbent Based on Chitosan and Vermiculite for Textile Wastewater Treatment","authors":"G. A. Ikhtiyarova,&nbsp;S. M. Turabdzhanov","doi":"10.1134/S0040579524700544","DOIUrl":"10.1134/S0040579524700544","url":null,"abstract":"<div><p>The synthesis of a new adsorbent based on Tebinbulok vermiculite modified with <i>Apis mellifera</i> chitosan for cleaning textile wastewater from indigo dye is described, and a technology for organovermiculite and modified vermiculite with hydrochloric acid is developed.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"330 - 333"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826322","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
A Study of the Phase Composition of a More than One-Hundred-Year-Old Ceramic Material 百年陶瓷材料的相组成研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700015
E. S. Abdrakhimova, V. Z. Abdrakhimov
{"title":"A Study of the Phase Composition of a More than One-Hundred-Year-Old Ceramic Material","authors":"E. S. Abdrakhimova,&nbsp;V. Z. Abdrakhimov","doi":"10.1134/S0040579524700015","DOIUrl":"10.1134/S0040579524700015","url":null,"abstract":"<div><p>The studied object is a more than hundred-year-old ceramic material taken from a distillery in the village of Rozhdestveno, Samara oblast. The elemental chemical composition of the studied material shows an increased carbon content (C = 9.48 wt %), which is indicative of the introduction of fuel into the raw brick. The pressing of fuel into the raw brick allows one to carry out the firing process without fuel losses, since the chemical reaction of carbon with oxygen, steam, carbon dioxide, and clay oxides occurs intensively at temperatures of 800°C and above, while a reducing medium is formed inside the product, which helps to increase the mechanical strength of the baked shard. In addition, CO burns out on the surface of the material, which intensifies the baking. The diffusion of oxygen into the bulk of the product promotes carbon burnout and accelerates baking. Clay minerals do not melt when heated to 1000°C, but the increased content of alkali oxides (R<sub>2</sub>O = 3.78 wt %) promotes the formation of mixtures with a melting point of 950°C. The liquid phase, even in small quantities, plays a very important role in increasing the sintering of the shard, effectively gluing the mineral particles of the ceramic mass into a single entity. The increased contents of the oxides of calcium (CaO = 9.42 wt %), magnesium (MgO = 2.875 wt %), and aluminum (Al<sub>2</sub>O<sub>3</sub> = 18.45 wt %) in the test sample contribute to the formation of anorthite and diopside, which increase the strength of the products.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"1 - 6"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826377","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
Spodumene Pegmatites of the Tastyg Deposit as a Promising Source of Lithium 塔斯提格矿藏的伟晶岩是一种前景看好的锂源
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700453
E. I. Berbekova, D. F. Kondakov, V. A. Krenev, L. G. Kuznetsova, E. N. Pechenkina, S. V. Fomichev
{"title":"Spodumene Pegmatites of the Tastyg Deposit as a Promising Source of Lithium","authors":"E. I. Berbekova,&nbsp;D. F. Kondakov,&nbsp;V. A. Krenev,&nbsp;L. G. Kuznetsova,&nbsp;E. N. Pechenkina,&nbsp;S. V. Fomichev","doi":"10.1134/S0040579524700453","DOIUrl":"10.1134/S0040579524700453","url":null,"abstract":"<div><p><b>Abstract</b>—Samples of the rocks of the Tastyg deposit are opened and chemically analyzed. Based on the chemical analysis data, a computer physical and chemical model of the conditions of formation of this rock is created and its mineral composition is calculated, the correctness of which is confirmed by experimental methods. The results of the studies allow further optimization of the technological processes for processing the raw materials of the Tastyg deposit.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"281 - 283"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826470","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
Doping of Lanthanum(III) Orthoborates and Metaborates with Europium(III) and Yttrium(III) Ions 镧（III）正硼酸盐和偏硼酸盐中掺杂铕（III）和钇（III）离子
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700672
N. I. Steblevskaya, M. V. Belobeletskaya
{"title":"Doping of Lanthanum(III) Orthoborates and Metaborates with Europium(III) and Yttrium(III) Ions","authors":"N. I. Steblevskaya,&nbsp;M. V. Belobeletskaya","doi":"10.1134/S0040579524700672","DOIUrl":"10.1134/S0040579524700672","url":null,"abstract":"<p>Orthoborates La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>BO<sub>3</sub> and metaborates La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>(BO<sub>2</sub>)<sub>3</sub> (<i>х</i> = 0.025; 0.05; 0.075; 0.1; 0.2; 0.4; 0.6; 0.8; 0.95) are synthesized under optimal conditions by the extraction pyrolytic method at a lower temperature and a shorter time as compared to the known methods. In single-phase systems, the unit cell volume in La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>BO<sub>3</sub> (aragonite structural type) and La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>(BO<sub>2</sub>)<sub>3</sub> (α-type monoclinic polymorph) decreases with an increase in the Y<sup>3+</sup> ion content. Under excitation at an Eu<sup>3+</sup> ion luminescence maximum λ<sub>em</sub> = 615 nm, the compounds have similar luminescence excitation spectra in the region of 230–320 nm. An increase in the Y<sup>3+</sup> ion content (<i>x</i> ≥ 0.1) in both orthoborates La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>BO<sub>3</sub> and metaborates La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>Y<sub><i>х</i></sub>(BO<sub>2</sub>)<sub>3</sub> leads to a certain change in the location and intensity distribution of transition bands because the nearest environment of the Eu<sup>3+</sup> ion in these compounds is transformed upon transition from one structural type to another. The introduction of the Y<sup>3+</sup> ion into La<sub>0.95</sub>Eu<sub>0.05</sub>BO<sub>3</sub> (5 mol %) or La<sub>0.95 –</sub> <sub><i>х</i></sub>Eu<sub>0.05</sub>(BO<sub>2</sub>)<sub>3</sub> (10 mol %) leads to an increase in the integral luminescence intensity. A further increase in the Y<sup>3+</sup> ion content decreases the luminescence intensity.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"409 - 416"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826054","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
Surface Tension of Arsenic Acid Solutions 砷酸溶液的表面张力
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700076
T. K. Menshchikova, K. S. Nikonov, M. N. Brekhovskikh, L. A. Vaimugin, O. E. Myslitskii
{"title":"Surface Tension of Arsenic Acid Solutions","authors":"T. K. Menshchikova,&nbsp;K. S. Nikonov,&nbsp;M. N. Brekhovskikh,&nbsp;L. A. Vaimugin,&nbsp;O. E. Myslitskii","doi":"10.1134/S0040579524700076","DOIUrl":"10.1134/S0040579524700076","url":null,"abstract":"<p>Investigation of the physicochemical properties of the H<sub>3</sub>AsO<sub>4</sub>–H<sub>2</sub>O system is of great importance, since arsenic acid is involved in the electrochemical synthesis of arsine, which is used to produce A<sup>III</sup>B<sup>V</sup> semiconductors. The surface tension of arsenic acid solutions of various concentrations in a wide temperature range (20–80°C) was measured by the stalagmometric method. It has been determined that arsenic acid in an aqueous solution is a surface-inactive substance because, with increasing concentration of H<sub>3</sub>AsO<sub>4</sub> in solution, its surface tension increases.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"29 - 32"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826372","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
Chemical and Mineral Composition of Anorthosite (Karelia, Russia) 斜长岩（卡累利阿，俄罗斯）化学和矿物组成
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S004057952470009X
E. N. Pechenkina, V. A. Krenev, S. V. Fomichev, E. I. Berbekova, D. F. Kondakov
{"title":"Chemical and Mineral Composition of Anorthosite (Karelia, Russia)","authors":"E. N. Pechenkina,&nbsp;V. A. Krenev,&nbsp;S. V. Fomichev,&nbsp;E. I. Berbekova,&nbsp;D. F. Kondakov","doi":"10.1134/S004057952470009X","DOIUrl":"10.1134/S004057952470009X","url":null,"abstract":"<div><p>The chemical composition of a sample of anorthosite from the Kotozero deposit (Karelia, Russia) was determined by inductively coupled plasma atomic emission spectroscopy. The mineral composition of the sample was calculated by physicochemical modeling and confirmed by X-ray powder diffraction analysis. Methods for using this rock were proposed.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"38 - 40"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826371","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 Properties of Polyamide-6 Prepolymer Granulate 聚酰胺-6 预聚物颗粒的性能研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700581
M. V. Barannikov, V. S. Polyakov, Yu. M. Bazarov, G. V. Osipova, K. A. Krivenko
{"title":"Study of the Properties of Polyamide-6 Prepolymer Granulate","authors":"M. V. Barannikov,&nbsp;V. S. Polyakov,&nbsp;Yu. M. Bazarov,&nbsp;G. V. Osipova,&nbsp;K. A. Krivenko","doi":"10.1134/S0040579524700581","DOIUrl":"10.1134/S0040579524700581","url":null,"abstract":"<p>A technological process for low-temperature hydrolytic polymerization of caprolactam in a melt is being developed, which includes two stages: the synthesis of a prepolymer and the continuous combined drying and demonomerization of the granulate. The first stage of the process was carried out at a temperature of 210–220°C. The synthesized prepolymer samples were studied for the content of low-molecular-weight compounds and relative viscosity.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"353 - 354"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826325","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 CaCl2–CaCl2⋅4CO(NH2)2–H2O System Sections at Temperatures from 0 to –55°C 温度为 0 至 -55°C 的 CaCl2-CaCl2⋅4CO(NH2)2-H2O 系统剖面中的相平衡
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700064
E. A. Frolova, D. F. Kondakov, G. E. Nikiforova, V. P. Danilov
{"title":"Phase Equilibria in CaCl2–CaCl2⋅4CO(NH2)2–H2O System Sections at Temperatures from 0 to –55°C","authors":"E. A. Frolova,&nbsp;D. F. Kondakov,&nbsp;G. E. Nikiforova,&nbsp;V. P. Danilov","doi":"10.1134/S0040579524700064","DOIUrl":"10.1134/S0040579524700064","url":null,"abstract":"<p>Phase equilibria in CaCl<sub>2</sub>–CaCl<sub>2</sub>⋅4CO(NH<sub>2</sub>)<sub>2</sub>–H<sub>2</sub>O system sections are studied at temperatures from 0 to –55°C. The earlier hypothesis that the formation of a low-temperature eutectic (–55°C) in the system is caused by CaCl<sub>2</sub>⋅4CO(NH<sub>2</sub>)<sub>2</sub> is confirmed. A number of low-temperature eutectic mixtures promising for the development of anti-icing reagents on their basis are revealed.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"25 - 28"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826368","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
Processing of Caps and Fixing Rings of Plastic Bottles: A New Approach 塑料瓶瓶盖和固定环加工的新途径
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700593
S. A. Kulyukhin, A. V. Gordeev, E. P. Krasavina, K. G. Arzumanova
{"title":"Processing of Caps and Fixing Rings of Plastic Bottles: A New Approach","authors":"S. A. Kulyukhin,&nbsp;A. V. Gordeev,&nbsp;E. P. Krasavina,&nbsp;K. G. Arzumanova","doi":"10.1134/S0040579524700593","DOIUrl":"10.1134/S0040579524700593","url":null,"abstract":"<div><p>A new method for processing plastic waste (fixing rings and caps of mineral and soda water plastic bottles) based on their gas-phase processing in a nitrating atmosphere followed by the disposal of conversion products is considered. It was established that keeping the cap samples (LDPE, PP, PETF) in a nitrating atmosphere obtained as a result of evaporation of 12 M HNO<sub>3</sub> at temperatures of 403–423 K for 24 h followed by dissolution of the conversion products in 1.0 M NaOH and ozonation of the resulting solutions allows efficient disposal of bottle waste regardless of the type of plastic.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"355 - 362"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826406","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
Physicochemical and Petrographic Studies of Perlite Rock Classified by Density 按密度分类的珍珠岩的物理化学和岩石学研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700039
N. V. Gurgenyan, A. E. Grigoryan, M. F. Kostandyan, A. V. Martirosyan, N. K. Vardanyan, I. B. Khachanova
{"title":"Physicochemical and Petrographic Studies of Perlite Rock Classified by Density","authors":"N. V. Gurgenyan,&nbsp;A. E. Grigoryan,&nbsp;M. F. Kostandyan,&nbsp;A. V. Martirosyan,&nbsp;N. K. Vardanyan,&nbsp;I. B. Khachanova","doi":"10.1134/S0040579524700039","DOIUrl":"10.1134/S0040579524700039","url":null,"abstract":"<div><p>Petrographic, silicate, X-ray powder diffraction, IR spectroscopic, and differential thermal analyses of perlite rock of the Aragats deposit, classified by density, were performed to establish the relationship between the average density of the rock, which is a representative criterion for assessing the quality of perlite raw materials, and the physical and chemical properties of the rock. The studies showed that a change in the average density cause changes in the main properties that influence expansion capacity, namely, the amount of magmatic water, which plays the role of a expanding agent.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"10 - 15"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826375","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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