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Features of the Extraction of Rare Earth Elements from Igneous and Sedimentary Phosphate Ores 从火成岩和沉积磷酸盐矿石中提取稀土元素的特点
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700696
I. A. Pochitalkina, A. E. Likhosherst, D. F. Kondakov
{"title":"Features of the Extraction of Rare Earth Elements from Igneous and Sedimentary Phosphate Ores","authors":"I. A. Pochitalkina,&nbsp;A. E. Likhosherst,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579524700696","DOIUrl":"10.1134/S0040579524700696","url":null,"abstract":"<div><p>Using the dependences <i>C</i>(REE) = <i>f</i>(τ), fundamental differences in extraction of rare earth elements (REEs) from phosphate raw materials of sedimentary and igneous origin were identified, which consist in the extremal and monotonic plateauing behavior of the kinetic curves, respectively. The discovered features of nitric acid extraction of rare earth elements will make it possible to evaluate the prospects for integrated processing of raw materials and optimal conditions for their recovery from multicomponent systems.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"421 - 424"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826056","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 Calcium Nitrate–Propylene Glycol–Water System Sections at Temperatures from 0 to –60°C 温度为 0 至 -60°C 的硝酸钙-丙二醇-水体系部分的相平衡
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700027
E. A. Frolova, D. F. Kondakov, V. P. Danilov
{"title":"Phase Equilibria in Calcium Nitrate–Propylene Glycol–Water System Sections at Temperatures from 0 to –60°C","authors":"E. A. Frolova,&nbsp;D. F. Kondakov,&nbsp;V. P. Danilov","doi":"10.1134/S0040579524700027","DOIUrl":"10.1134/S0040579524700027","url":null,"abstract":"<div><p><b>Abstract</b>—Phase equilibria in Ca(NO<sub>3</sub>)<sub>2</sub>–C<sub>3</sub>H<sub>6</sub>(OH)<sub>2</sub>–H<sub>2</sub>O system sections and anti-icing properties of calcium nitrate–propylene glycol compositions with a component ratio from 1 : 3 to 3 : 1 are studied, and the temperatures and composition of eutectics with ice and the melting capacity of nitrate–propylene glycol compositions at temperatures of –5 and –10°C are determined. The compositions characterized by good anti-icing properties are identified.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"7 - 9"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826376","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 and Structural Study of Sodium Dodecyl Sulfate–Butanol-1–Kerosene–Aqueous Acid Solution Emulsions Suitable for the Chemical Polishing of Copper and Aluminum Surfaces 适合铜和铝表面化学抛光的十二烷基硫酸钠-1-丁醇-1-煤油-酸水溶液乳液的合成与结构研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700386
P. E. Tyulyagin, A. A. Steshenko, A. S. Polyakova, N. M. Murashova
{"title":"Synthesis and Structural Study of Sodium Dodecyl Sulfate–Butanol-1–Kerosene–Aqueous Acid Solution Emulsions Suitable for the Chemical Polishing of Copper and Aluminum Surfaces","authors":"P. E. Tyulyagin,&nbsp;A. A. Steshenko,&nbsp;A. S. Polyakova,&nbsp;N. M. Murashova","doi":"10.1134/S0040579524700386","DOIUrl":"10.1134/S0040579524700386","url":null,"abstract":"<div><p>A method for the chemical polishing of metals using a nanostructured system of inverse sodium dodecyl sulfate–butanol-1–kerosene–aqueous acid solution microemulsions is proposed. The boundaries of the areas where microemulsions can exist in this system are shown. The acid concentrations enabling the polishing of copper and aluminum are selected. The conditions providing a decrease of up to 20% in the average roughness of these metals are determined.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"233 - 239"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826457","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
Anti-Icing Properties of Calcium Nitrate–Ethanol–Water Compositions at Temperatures below 0°C 硝酸钙-乙醇-水复合物在 0°C 以下温度条件下的抗结冰特性
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700052
E. A. Frolova, D. F. Kondakov, V. P. Danilov
{"title":"Anti-Icing Properties of Calcium Nitrate–Ethanol–Water Compositions at Temperatures below 0°C","authors":"E. A. Frolova,&nbsp;D. F. Kondakov,&nbsp;V. P. Danilov","doi":"10.1134/S0040579524700052","DOIUrl":"10.1134/S0040579524700052","url":null,"abstract":"<div><p>Phase equilibria in Ca(NO<sub>3</sub>)<sub>2</sub>–C<sub>2</sub>H<sub>5</sub>OH–H<sub>2</sub>O system sections and anti-icing properties of calcium nitrate–ethanol compositions with a component ratio from 1 : 3 to 3 : 1 are studied. The temperatures and composition of eutectics with ice and the melting ability of nitrate–ethanol compositions at temperatures of –5 and –10°C are determined. The compositions characterized by good anti-icing properties are revealed.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"22 - 24"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826369","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
Statistical Regularities of Forming Porosity in Plane-Parallel Basalt-Plastic Composite Materials during Climatic Degradation and Forecasting Their Properties 平面平行玄武岩-塑料复合材料在气候降解过程中形成孔隙的统计规律性及其性能预测
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700404
G. G. Vinokurov, N. F. Struchkov, A. K. Kychkin, M. P. Lebedev
{"title":"Statistical Regularities of Forming Porosity in Plane-Parallel Basalt-Plastic Composite Materials during Climatic Degradation and Forecasting Their Properties","authors":"G. G. Vinokurov,&nbsp;N. F. Struchkov,&nbsp;A. K. Kychkin,&nbsp;M. P. Lebedev","doi":"10.1134/S0040579524700404","DOIUrl":"10.1134/S0040579524700404","url":null,"abstract":"<div><p>Statistical regularities of porosity formation during climatic tests of plane-parallel composite materials are revealed. To predict changes in the physical and mechanical properties of composite materials, it is proposed to use the Balshin–Huttig relationship of dimensionless properties and porosity. Taking into account experimental data on the porosity of plane-parallel basalt-plastic and fiberglass composite materials, calculations are made to reduce their physical and mechanical properties.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"243 - 249"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826458","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 the Synthesis Conditions and Nature of Precursors on the Phase Composition of Zirconium and Sodium Phosphatosilicates (NASICON) 合成条件和前驱体性质对锆和钠磷硅酸盐相组成的影响 (NASICON)
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700040
D. N. Grishchenko, E. E. Dmitrieva, V. G. Kuryavyi, M. A. Medkov
{"title":"Effect of the Synthesis Conditions and Nature of Precursors on the Phase Composition of Zirconium and Sodium Phosphatosilicates (NASICON)","authors":"D. N. Grishchenko,&nbsp;E. E. Dmitrieva,&nbsp;V. G. Kuryavyi,&nbsp;M. A. Medkov","doi":"10.1134/S0040579524700040","DOIUrl":"10.1134/S0040579524700040","url":null,"abstract":"<div><p><b>Abstract</b>—New methods for the synthesis of NASICON of the composition Na<sub>1 +</sub> <sub><i>x</i></sub>Zr<sub>2</sub>P<sub>3 –</sub> <sub><i>x</i></sub>Si<sub><i>x</i></sub>O<sub>12</sub> (0 ≤ <i>x</i> ≤ 3) were presented. In the work, the method of pyrolysis of organic solutions was used, which takes a minimum time to synthesize the material. Various options for the composition and heat treatment of precursors were considered. The effect of rosin on the pyrolysis process and the phase composition of the final products was discussed. The optimal conditions for the synthesis of the low-dimensional monoclinic polymorph Na<sub>3</sub>Zr<sub>2</sub>Si<sub>2</sub>PO<sub>12</sub> with homogeneous composition were determined.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"16 - 21"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826370","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
Production of Sea Buckthorn Oil via Supercritical Carbon Dioxide Extraction of Sea Buckthorn Fruit Pressed Cake with Subsequent Centrifugation
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S004057952470074X
O. I. Pokrovskiy, D. V. Ovchinnikov, A. D. Ivakhnov, I. V. Chernyshev
{"title":"Production of Sea Buckthorn Oil via Supercritical Carbon Dioxide Extraction of Sea Buckthorn Fruit Pressed Cake with Subsequent Centrifugation","authors":"O. I. Pokrovskiy,&nbsp;D. V. Ovchinnikov,&nbsp;A. D. Ivakhnov,&nbsp;I. V. Chernyshev","doi":"10.1134/S004057952470074X","DOIUrl":"10.1134/S004057952470074X","url":null,"abstract":"<p>A simple method for obtaining sea buckthorn (<i>Hyppophae rhamnoides</i>) oil with carotenoid content high enough to comply with the requirements for sea buckthorn oil based wound remedy is proposed. A method is based on supercritical carbon dioxide extraction of dried pressed cake of sea buckthorn berries at high extraction pressures (up to 55 MPa) for obtaining higher carotenoid concentration and subsequent centrifugation in order to separate solid wax fraction. Chromatography and spectrophotometry analyses of such oil support the potential perspective of the proposed method.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"303 - 307"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826475","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
Reagent-Free Technology for Intensifying the Process of Growing Microgreens in Aquaponic Systems
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700350
V. N. Shtepa, S. Yu. Kireev, A. V. Kozyr, A. B. Shikunets
{"title":"Reagent-Free Technology for Intensifying the Process of Growing Microgreens in Aquaponic Systems","authors":"V. N. Shtepa,&nbsp;S. Yu. Kireev,&nbsp;A. V. Kozyr,&nbsp;A. B. Shikunets","doi":"10.1134/S0040579524700350","DOIUrl":"10.1134/S0040579524700350","url":null,"abstract":"<div><p>An assessment is made of the current state of the global food security, which arises as a result of new challenges, in order to achieve the UN Sustainable Development Goals. Currently, aquaponic technologies are considered quite promising for providing regional consumers with food (hydrobionts and phytoproducts). Reagent-free technologies for intensifying plant growth and development (electromagnetic influence, ultrasonic waves, corona discharge) are analyzed. The use of installations for the electrolysis treatment of aqueous solutions for growing hydrobionts before feeding them into hydroponic modules is substantiated. The results indicate a significant increase in plant productivity by more than 30% after electrochemical treatment. Changes in the hydrochemical and hydrophysical properties of water after electrolysis are analyzed. A scheme of an aquaponic system for intensifying reagent-free electrolysis of growing microgreen plants is proposed and verified. It is substantiated that further research should be aimed at building process-control systems in aquaponic installations and creating specialized energy-efficient DC power supplies.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"211 - 216"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826254","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 Mixed Uranium Oxide and Plutonium Powders Using a Thin-Film Rotary Apparatus
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700295
A. S. Aloi, A. Yu. Abashkin, R. V. Ismailov, T. I. Kol’tsova, A. A. Murzin, V. F. Saprykin, A. A. Khorshev
{"title":"Preparation of Mixed Uranium Oxide and Plutonium Powders Using a Thin-Film Rotary Apparatus","authors":"A. S. Aloi,&nbsp;A. Yu. Abashkin,&nbsp;R. V. Ismailov,&nbsp;T. I. Kol’tsova,&nbsp;A. A. Murzin,&nbsp;V. F. Saprykin,&nbsp;A. A. Khorshev","doi":"10.1134/S0040579524700295","DOIUrl":"10.1134/S0040579524700295","url":null,"abstract":"<div><p><b>Abtract</b>—The possibility was shown of using a thin-film rotary apparatus for the preparation of dry precursor salts in the form of ammonium uranyl nitrate and uranyl formate containing up to 5 wt % low-background plutonium. Dioxide powders obtained after the thermal decomposition and reduction of the salts are represented by a solid solution (U<sub>0.95</sub>Pu<sub>0.05</sub>)O<sub>2</sub> in both cases. Based on the analysis of the amounts of secondary radioactive waste (RAW), specific surface areas of powders, and particle shapes, it was decided to continue elaboration of the process using highly active uranium-plutonium solutions and formic acid.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 1","pages":"169 - 175"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826276","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
Nitric Acid Processing of Perovskite Concentrate under Atmospheric and Autoclave Conditions 在大气和高压釜条件下用硝酸加工过氧化物硅酸盐浓缩物
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-12-16 DOI: 10.1134/S0040579524700623
A. G. Artemenkov, L. G. Gerasimova, A. I. Nikolaev, Yu. G. Bychenya, E. S. Shchukina, E. V. Kuznetsova
{"title":"Nitric Acid Processing of Perovskite Concentrate under Atmospheric and Autoclave Conditions","authors":"A. G. Artemenkov,&nbsp;L. G. Gerasimova,&nbsp;A. I. Nikolaev,&nbsp;Yu. G. Bychenya,&nbsp;E. S. Shchukina,&nbsp;E. V. Kuznetsova","doi":"10.1134/S0040579524700623","DOIUrl":"10.1134/S0040579524700623","url":null,"abstract":"<div><p>The interaction of perovskite concentrate with nitric acid under atmospheric conditions and at an excess pressure was studied. High efficiency was achieved in the separation of components in the form of a solid phase (hydrated precipitate of titanium and rare metals) and a liquid phase containing calcium, rare-earth metals, and thorium. It was shown that the conditions of the acid treatment of the resulting precursors determine their structure and composition, which, in turn, determine the directions of their further processing to obtain final products. In particular, it was established that an increased pressure in the reaction zone causes rutilization of the hydrated precipitate, and therefore its further processing to produce titanium dioxide and rare metals should be carried out by chlorination.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 2","pages":"379 - 385"},"PeriodicalIF":0.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826409","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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