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Chemical Treatment of the Near-Wellbore Zone for Enhanced Oil Recovery 近井区化学处理提高原油采收率
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S004057952670051X
F. K. Kyazimov, K. A. Mamedov
{"title":"Chemical Treatment of the Near-Wellbore Zone for Enhanced Oil Recovery","authors":"F. K. Kyazimov,&nbsp;K. A. Mamedov","doi":"10.1134/S004057952670051X","DOIUrl":"10.1134/S004057952670051X","url":null,"abstract":"<p>The application of developed methods for enhanced oil recovery often fails to provide the expected effect. In this regard, increasing the efficiency of the applied stimulation methods or developing new innovative technologies is particularly relevant. During the operation of oil fields at the final stage of development, disruption of thermodynamic equilibrium in the near-wellbore zone leads to precipitation of asphaltene–resin–paraffin compounds contained in high-viscosity oils, which reduces the filtration capacity of reservoir fluids and sharply decreases production. To overcome such complications, a microemulsion consisting of technical lecithin, a surfactant, hydrochloric acid, and a hydrocarbon solvent was developed, and its effect on near-wellbore zone permeability and residual oil recovery was studied by laboratory experiments. It was determined that injection of the microemulsion into a model composed of terrigenous rocks increased the final oil recovery factor by 15.5% and permeability by a factor of 2.3, whereas injection into a model composed of carbonate rocks increased the final oil recovery factor by 22.9% and permeability by a factor of 5. Based on the results, the mechanism of action of the new microemulsion composition on the near-wellbore zone is proposed. Field tests showed that treatment of the near-wellbore zone with the microemulsion increased the well flow rate by 27%.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"310 - 314"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098526","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
Optimization of the Recovery Process of Nitrile Butadiene Rubber from Latex 从乳胶中回收丁腈橡胶工艺的优化
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700466
E. V. Churilina, S. S. Nikulin, L. N. Stadnik, S. A. Vragov
{"title":"Optimization of the Recovery Process of Nitrile Butadiene Rubber from Latex","authors":"E. V. Churilina,&nbsp;S. S. Nikulin,&nbsp;L. N. Stadnik,&nbsp;S. A. Vragov","doi":"10.1134/S0040579526700466","DOIUrl":"10.1134/S0040579526700466","url":null,"abstract":"<p>A study of the recovery of nitrile butadiene rubber from latex using copolymers based on <i>N,N</i>-diallyl-<i>N,N</i>-dimethylammonium chloride is presented. Mathematical design of experiments was employed to obtain a regression equation describing the effects of coagulant consumption, dispersed-phase concentration, and temperature on the recovery of rubber from SKN-40SNT latex. The physical and mechanical properties of the vulcanizates comply with the specified requirements.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"286 - 290"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098626","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
Technological Efficiency of Capturing Model Mixtures of Surrogate Compounds of Volatile Fission Products Using Ceramic Honeycomb Contact Elements 利用陶瓷蜂窝接触元件捕获挥发性裂变产物替代化合物模型混合物的技术效率
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700612
M. D. Gasparyan, V. N. Grunskii, S. V. Tishchenko, O. Yu. Salnikova, A. I. Dubko
{"title":"Technological Efficiency of Capturing Model Mixtures of Surrogate Compounds of Volatile Fission Products Using Ceramic Honeycomb Contact Elements","authors":"M. D. Gasparyan,&nbsp;V. N. Grunskii,&nbsp;S. V. Tishchenko,&nbsp;O. Yu. Salnikova,&nbsp;A. I. Dubko","doi":"10.1134/S0040579526700612","DOIUrl":"10.1134/S0040579526700612","url":null,"abstract":"<p>The efficiency of capturing vapors of cesium, molybdenum, and tellurium oxides, as well as molecular iodine, from mixtures with different component ratios using ceramic honeycomb contact elements was investigated. The total dynamic sorption capacity of the contact elements and the composition of the chemisorption products were determined. The developed contact elements are recommended for practical application in gas purification systems for irradiated nuclear fuel reprocessing.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"362 - 373"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098630","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
Influence of Water Absorption of Perlite Rock on the Properties of Expanded Perlite and Thermal Insulation Materials Based on It 珍珠岩吸水率对膨胀珍珠岩性能的影响及基于此的保温材料
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700375
N. V. Gurgenyan, I. B. Khachanova, A. V. Martirosyan, A. S. Saakov
{"title":"Influence of Water Absorption of Perlite Rock on the Properties of Expanded Perlite and Thermal Insulation Materials Based on It","authors":"N. V. Gurgenyan,&nbsp;I. B. Khachanova,&nbsp;A. V. Martirosyan,&nbsp;A. S. Saakov","doi":"10.1134/S0040579526700375","DOIUrl":"10.1134/S0040579526700375","url":null,"abstract":"<p>Studies confirming the influence of the properties of perlite rock on the properties of expanded perlite and products based on it were carried out. In particular, the influence of porosity on the water absorption of the rock, expanded perlite produced from raw materials classified by density and particle size, and products based on it was evaluated. A mechanism for reducing the water absorption of the rock–porous aggregate–product system by selective mining of perlite rock according to density and by narrow fractionation of the raw material is presented.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"237 - 242"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098274","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 Titanosilicate Compositions by Heterogeneous Synthesis 非均相合成制备硅酸钛组合物
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700351
L. G. Gerasimova, E. S. Shchukina, A. I. Nikolaev
{"title":"Preparation of Titanosilicate Compositions by Heterogeneous Synthesis","authors":"L. G. Gerasimova,&nbsp;E. S. Shchukina,&nbsp;A. I. Nikolaev","doi":"10.1134/S0040579526700351","DOIUrl":"10.1134/S0040579526700351","url":null,"abstract":"<p>Titanosilicate compositions were obtained using solid silicon-containing materials and various methods of their interaction with titanium-containing solutions based on coprecipitation under heterogeneous conditions through thermal or alkaline hydrolysis. Analysis of thermogravimetric analysis, X-ray diffraction, and IR spectroscopic data together with particle morphology data showed that silica particles serve as crystallization centers for titanium hydroxide. The shell coating is apparently distributed nonuniformly over the surface of the core. Therefore, the precipitates contain individual X-ray amorphous titanium and silica phases. Their content in the ammonia-hydrolyzed sample is noticeably higher than in the sample obtained by thermal hydrolysis. Conditions for fixation of the shell on the particles through dehydration during heat treatment of the titanosilicate precipitate were determined, providing the phase transition titanium hydroxide → anatase under relatively mild conditions at 700°C. The applied approaches make it possible to obtain a final product with specified functional properties and thereby expand the fields of its application.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"223 - 230"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098278","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 KU-2×8-Ag Cation-Exchange Resin in a Nitrating Atmosphere KU-2×8-Ag阳离子交换树脂在硝化气氛下的化学处理
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700429
S. A. Kulyukhin, A. V. Gordeev, E. P. Krasavina, A. F. Seliverstov, A. Yu. Kazberova, Yu. M. Nevolin
{"title":"Chemical Processing of KU-2×8-Ag Cation-Exchange Resin in a Nitrating 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/S0040579526700429","DOIUrl":"10.1134/S0040579526700429","url":null,"abstract":"<p>A destructive processing method for KU-2×8-Ag cation-exchange resin based on gas-phase treatment in a nitrating atmosphere followed by chemical treatment of the conversion products is described. It is shown that exposing KU-2×8-Ag cation-exchange resin samples to an HNO<sub>3</sub> vapor–air atmosphere at 130 and 150°C for 24 h, followed by dissolution of the conversion products in 0.5 mol L<sup>−1</sup> NaOH and ozonation of the resulting solutions, provides an efficient route for the disposal of KU-2×8-Ag cation-exchange resin.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"270 - 276"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098279","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
Application of Alcohols in Mixtures with Urea as Liquid Deicing Compositions 醇类在尿素混合物中作为液体除冰成分的应用
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700478
E. A. Frolova, D. F. Kondakov
{"title":"Application of Alcohols in Mixtures with Urea as Liquid Deicing Compositions","authors":"E. A. Frolova,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579526700478","DOIUrl":"10.1134/S0040579526700478","url":null,"abstract":"<p>The equilibrium curves in the ethanol–water, isopropanol–water, and propylene glycol–water systems are shown to exhibit anomalous behavior, apparently associated with the formation of hydrates of the corresponding alcohols. The deicing performance of liquid compositions based on urea and ethanol, isopropanol, ethylene glycol, propylene glycol, and glycerol was analyzed.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"291 - 294"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098448","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
Specific Heat Consumption in Distillation Depends Only on the Reflux Ratio and Does Not Depend on the Vapor Ratio 蒸馏中的比热耗仅取决于回流比而不取决于蒸汽比
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700648
M. K. Zakharov, D. B. Pletnev, K. O. Mishchenko
{"title":"Specific Heat Consumption in Distillation Depends Only on the Reflux Ratio and Does Not Depend on the Vapor Ratio","authors":"M. K. Zakharov,&nbsp;D. B. Pletnev,&nbsp;K. O. Mishchenko","doi":"10.1134/S0040579526700648","DOIUrl":"10.1134/S0040579526700648","url":null,"abstract":"<p>Various approaches to reducing heat energy consumption during the separation of liquid mixtures by distillation are considered. The theory of internal energy conservation in the distillation process is presented. It is shown that the specific heat consumption depends only on the reflux ratio and not on the vapor ratio. The theory of internal energy conservation confirms the necessity of intermediate pump-around reflux in complex crude oil distillation columns.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"387 - 394"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098629","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 Sorption of Ammonium Ions by Zeolite Derived from Ash and Slag Waste from Thermal Power Plants 火电厂灰渣沸石对铵离子的静态吸附研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700569
T. G. Korotkova, S. A. Bushumov, A. S. Danilchenko, A. M. Zakolyukina
{"title":"Static Sorption of Ammonium Ions by Zeolite Derived from Ash and Slag Waste from Thermal Power Plants","authors":"T. G. Korotkova,&nbsp;S. A. Bushumov,&nbsp;A. S. Danilchenko,&nbsp;A. M. Zakolyukina","doi":"10.1134/S0040579526700569","DOIUrl":"10.1134/S0040579526700569","url":null,"abstract":"<p><b>Abstract</b>—The experimental data on static sorption in the zeolite–ammonium ion system are presented for zeolite doses of 1, 2 and 5 g per 50 cm<sup>3</sup> of solution over an initial ammonium ion concentration range of 2 to 2000 mg/dm<sup>3</sup>. The zeolite was obtained by hydrothermal treatment of a calcined sorbent derived from ash‑slag waste of the power industry with 2 M sodium hydroxide solution. The experimental phase‑equilibrium sorption data were analyzed using the Temkin and Dubinin–Radushkevich isotherms. It was found that the distribution coefficient <i>K</i><sub>d</sub> and the removal efficiency <i>E</i>, as functions of the initial sorbtiv concentration <i>C</i><sub>0</sub> in the solution, exhibit a maximum that shifts toward higher initial concentrations as the zeolite dose increases. Good qualitative agreement between theory and experiment was demonstrated for both isotherms. Experimental studies of the phase equilibrium in the zeolite–ammonium ion system were also carried out on real wastewater. It was concluded that hydrothermal treatment of the calcined sorbent from ash‑slag waste of the power industry increases the sorption capacity of the zeolite.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"332 - 339"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098444","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
Morphological Study of Polyethylene Glycols and Polyethylene Oxide with Different Molecular Weights 不同分子量聚乙二醇和聚氧化物的形态研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700491
R. A. Alekhina, N. D. Blinov
{"title":"Morphological Study of Polyethylene Glycols and Polyethylene Oxide with Different Molecular Weights","authors":"R. A. Alekhina,&nbsp;N. D. Blinov","doi":"10.1134/S0040579526700491","DOIUrl":"10.1134/S0040579526700491","url":null,"abstract":"<p>A comparative study of the morphology of polyethylene glycols and polyethylene oxide with different molecular weights was carried out. It was established that increasing molecular weight results in an increase in the degree of crystallinity, melting temperature, and thermal stability of the polymers. All of the compounds studied exhibit an amorphous–crystalline structure regardless of their physical state.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"300 - 304"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098450","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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