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Hydrothermal Synthesis of Yttrium Stannate with a Pyrochlore Structure 具有焦绿石结构的锡酸钇的水热合成
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700053
M. A. Ryumin, G. E. Nikiforova, D. F. Kondakov
{"title":"Hydrothermal Synthesis of Yttrium Stannate with a Pyrochlore Structure","authors":"M. A. Ryumin,&nbsp;G. E. Nikiforova,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579526700053","DOIUrl":"10.1134/S0040579526700053","url":null,"abstract":"<p>Optimal conditions for the preparation of yttrium stannate with a pyrochlore structure by hydrothermal synthesis were determined. A preliminary assessment of the feasibility of using this method is presented.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"28 - 30"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613636","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 Processing of Finely Disperse Ion-Exchange Resin KU-2x8 Containing Metal Ions in a Nitriding Atmosphere 氮化气氛中含金属离子细分散离子交换树脂KU-2x8的化学处理
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700120
S. A. Kulyukhin, A. V. Gordeev, E. P. Krasavina, A. F. Seliverstov, A. Yu. Kazberova, Yu. M. Nevolin
{"title":"Chemical Processing of Finely Disperse Ion-Exchange Resin KU-2x8 Containing Metal Ions in a Nitriding Atmosphere","authors":"S. A. Kulyukhin,&nbsp;A. V. Gordeev,&nbsp;E. P. Krasavina,&nbsp;A. F. Seliverstov,&nbsp;A. Yu. Kazberova,&nbsp;Yu. M. Nevolin","doi":"10.1134/S0040579526700120","DOIUrl":"10.1134/S0040579526700120","url":null,"abstract":"<div><p>A new approach to the destructive processing of finely disperse ion-exchange resin KU-2x8-M (M—Ni, Cu, Nd, Fe, U) on the basis of gas-phase treatment in a nitriding atmosphere with further chemical processing of conversion products is considered. It is shown that the exposure of finely disperse ion-exchange resin KU-2x8-M samples (M = Ni, Cu, Nd, Fe, U) to an HNO<sub>3</sub> (vapor)–air atmosphere at temperatures of 130 and 150°C for 24 h with further dissolution of conversion products in 0.5 mol/L NaOH and ozonation of resulting solutions provides the efficient utilization of finely disperse ion-exchange resin KU-2x8-M.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"61 - 69"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613637","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
Catalytic Cracking with Adjustable Process Severity: Hardware and Technology Solutions for the Reactor Unit 具有可调过程严重性的催化裂化：反应器装置的硬件和技术解决方案
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700284
B. V. Andreev, R. V. Basov, A. S. Ustinov, O. G. Belyavskiy, I. R. Kvetko, S. V. Chesak, A. V. Anisimov
{"title":"Catalytic Cracking with Adjustable Process Severity: Hardware and Technology Solutions for the Reactor Unit","authors":"B. V. Andreev,&nbsp;R. V. Basov,&nbsp;A. S. Ustinov,&nbsp;O. G. Belyavskiy,&nbsp;I. R. Kvetko,&nbsp;S. V. Chesak,&nbsp;A. V. Anisimov","doi":"10.1134/S0040579526700284","DOIUrl":"10.1134/S0040579526700284","url":null,"abstract":"<div><p>Presented and discussed are the equipment and process design solutions developed for Gazprom Neft for the main functional units of reactor-regenerator sections of fluid catalytic cracking (FCC) units with controlled process severity. These solutions enable both the revamp of existing FCC units and the construction of new, state‑of‑the‑art facilities designed for flexible operation across various cracking modes: from the conventional fuel‑oriented mode to the petrochemical mode of the process.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"176 - 182"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613640","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
Synthesis of Carbon-Containing Spheres from KU-2–8 Resin in the H+ Form KU-2-8树脂H+型含碳球的合成
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700132
S. A. Kulyukhin, A. V. Gordeev, A. A. Bessonov, Yu. M. Nevolin
{"title":"Synthesis of Carbon-Containing Spheres from KU-2–8 Resin in the H+ Form","authors":"S. A. Kulyukhin,&nbsp;A. V. Gordeev,&nbsp;A. A. Bessonov,&nbsp;Yu. M. Nevolin","doi":"10.1134/S0040579526700132","DOIUrl":"10.1134/S0040579526700132","url":null,"abstract":"<p>Pyrolysis of the ion-exchange resin KU-2–8-H<sup>+</sup> under irradiation in a microwave field at a power of 600–800 W and irradiation time of 2–30 min was studied. Pyrolysis produces spherical granules consisting of an ion-exchange resin core and a carbon shell. The synthesized pyrolysis granules were characterized by X‑ray diffraction and thermogravimetric analyses; IR spectra were recorded, physical adsorption characteristics were determined, and water saturation data were obtained.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"70 - 78"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613700","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
Synthesis of the TiO2/SiO2 Binary Xerogel Using the TiO2/NaCl Composite TiO2/NaCl复合材料制备TiO2/SiO2二元干凝胶
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700107
A. B. Shishmakov, Yu. V. Mikushina, O. V. Koryakova
{"title":"Synthesis of the TiO2/SiO2 Binary Xerogel Using the TiO2/NaCl Composite","authors":"A. B. Shishmakov,&nbsp;Yu. V. Mikushina,&nbsp;O. V. Koryakova","doi":"10.1134/S0040579526700107","DOIUrl":"10.1134/S0040579526700107","url":null,"abstract":"<p>A method for the synthesis of the TiO<sub>2</sub>/SiO<sub>2</sub> binary xerogel (5–40% TiO<sub>2</sub>) using a TiO<sub>2</sub>/NaCl composite and hydroxylated SiO<sub>2</sub> xerogel was developed. The TiO<sub>2</sub>/NaCl composite was obtained by adding salt to the product of the interaction of tetrabutoxytitanium and hydrogen peroxide followed by drying and calcination at 700°C. Analysis of IR spectroscopy data indicates interaction between TiO<sub>2</sub> particles and particles of amorphous silica with the formation of a Si–O–Ti bond. The specific catalytic activity of TiO<sub>2</sub> particles in the model process of hydrogen peroxide decomposition increases with an increasing fraction of silica in the material.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"50 - 56"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613694","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
Picritic Basalts of the Talnakh Ore Field Talnakh矿田的玄武岩
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S004057952670020X
S. V. Fomichev, V. A. Krenev, E. N. Pechenkina, E. I. Berbekova
{"title":"Picritic Basalts of the Talnakh Ore Field","authors":"S. V. Fomichev,&nbsp;V. A. Krenev,&nbsp;E. N. Pechenkina,&nbsp;E. I. Berbekova","doi":"10.1134/S004057952670020X","DOIUrl":"10.1134/S004057952670020X","url":null,"abstract":"<p>Melting and crystallization processes of the Si–Al–Ti–Fe–Mg–Ca–Na–K–O system, representing picrobasalt, an ultrabasic volcanic rock of subalkaline type with 35% ≤ SiO<sub>2</sub> ≤ 45% and 0% ≤ (Na<sub>2</sub>O + K<sub>2</sub>O) ≤ 2%, were studied by computer physicochemical modeling. The total content of Na<sub>2</sub>O and K<sub>2</sub>O in the rock does not exceed 2%. The methods presented, based on chemical analysis data of the rock, enable calculation of the phase composition of crystallizing melts in different atmospheres, which allows assessment of the use of magmatic rocks as raw materials for pyrometallurgy.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"115 - 118"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613840","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 Technological Features of Pigment Production from Phosphogypsum 磷石膏生产颜料的工艺特点研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700119
D. V. Yakhonova, G. N. Zemchenko, Yu. A. Gaidukova, M. A. Egorova, N. P. Shabelskaya
{"title":"Study of Technological Features of Pigment Production from Phosphogypsum","authors":"D. V. Yakhonova,&nbsp;G. N. Zemchenko,&nbsp;Yu. A. Gaidukova,&nbsp;M. A. Egorova,&nbsp;N. P. Shabelskaya","doi":"10.1134/S0040579526700119","DOIUrl":"10.1134/S0040579526700119","url":null,"abstract":"<p>For the first time, the possibility of using the sorption of metal cations from an aqueous solution by a porous carbon material with subsequent introduction as a doping additive for obtaining an ultraviolet pigment during reductive heat treatment of phosphogypsum was studied. The revealed patterns open wide possibilities for involving wastes, wastewater from industrial enterprises and solid wastes of chemical production, in secondary recycling with the production of domestic products with high added value.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"57 - 60"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613699","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
Disposal of Gas Emissions From Pyrolysis Plants 热解装置排放气体的处理
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700326
T. N. Patrusheva, S. K. Petrov, O. V. Churbakova
{"title":"Disposal of Gas Emissions From Pyrolysis Plants","authors":"T. N. Patrusheva,&nbsp;S. K. Petrov,&nbsp;O. V. Churbakova","doi":"10.1134/S0040579526700326","DOIUrl":"10.1134/S0040579526700326","url":null,"abstract":"<div><p>The article provides a review of pyrolysis processes, including the stages of pyrolytic decomposition of organic substances according to temperature ranges. Six categories are considered depending on operating conditions: slow pyrolysis, fast pyrolysis, flash pyrolysis, vacuum pyrolysis, intermediate pyrolysis, and hydropyrolysis. Methods for treating gaseous emissions are examined, such as: gas recirculation; absorption of gases into liquids; adsorption of gases onto solid materials; passing the gas through a hot flame; detonation-mode disposal of pyrolysis gases; and dispersion of industrial emission components in the atmosphere to harmless concentrations.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"206 - 210"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613843","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
Solid-Phase Synthesis of Ceramic Pigments with Wollastonite Structure 硅灰石结构陶瓷颜料的固相合成
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700028
K. G. Grigoryan, A. A. Khachatryan, L. G. Baginova, S. M. Ayrapetyan, K. N. Edilyan, S. M. Yayloyan
{"title":"Solid-Phase Synthesis of Ceramic Pigments with Wollastonite Structure","authors":"K. G. Grigoryan,&nbsp;A. A. Khachatryan,&nbsp;L. G. Baginova,&nbsp;S. M. Ayrapetyan,&nbsp;K. N. Edilyan,&nbsp;S. M. Yayloyan","doi":"10.1134/S0040579526700028","DOIUrl":"10.1134/S0040579526700028","url":null,"abstract":"<p>Ceramic pigments with a wollastonite structure were synthesized using natural quartz sand and limestone. At 1300°C and a firing time of 1 h, α-wollastonite forms in samples containing 5–10% (wt %) Co<sub>3</sub>O<sub>4</sub> at a molar ratio CaO/SiO<sub>2</sub> = 1. In the presence of 5% (wt %) chromium and iron oxides, firing for 1 h at 1300°C yields a stable composition only at an excess of silica (CaO/SiO<sub>2</sub> = 0.8). The product contains α-wollastonite and cristobalite.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"6 - 9"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613844","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
Method of Model Development for Quality Indicators Estimation of Fractionation Column Products in Case of Small Size of Laboratory Data 实验室数据量小情况下分馏塔产品质量指标估计模型开发方法
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-23 DOI: 10.1134/S0040579526600725
A. A. Plotnikov, D. V. Shtakin, O. Yu. Snegirev, A. Yu. Torgashov
{"title":"Method of Model Development for Quality Indicators Estimation of Fractionation Column Products in Case of Small Size of Laboratory Data","authors":"A. A. Plotnikov,&nbsp;D. V. Shtakin,&nbsp;O. Yu. Snegirev,&nbsp;A. Yu. Torgashov","doi":"10.1134/S0040579526600725","DOIUrl":"10.1134/S0040579526600725","url":null,"abstract":"<p>The paper addresses the problem of improving the accuracy of models for assessing low-temperature properties, ignitability indicators, and anti-wear properties of target products from fractionating column at limited laboratory data. To solve this problem, a method of model development is proposed, which includes an algorithm of augmenting a small training sample on fractional composition data. The algorithm is distinguished by a method of selecting additional data considering the sparsity indicator, which made it possible to include the required amount of data in the training sample and, as a result, ensure improved model quality. The use of the proposed method has enabled to increase model accuracy by an average of 18% compared to known methods and by an average of 6% compared to a method based on augmentation the training sample without considering the sparsity indicator. The results are presented using examples of model development for quality indicators estimation, such as the cold filter plugging point, flash point, kinematic viscosity at 40°C, cetane number of middle distillate (diesel fraction), and flash point of the kerosene fraction from an industrial fractionating column of a hydrocracking unit.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"59 6","pages":"1467 - 1483"},"PeriodicalIF":0.4,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552864","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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