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Functional-cost analysis of methods of regeneration of used mineral motor oils 废旧矿物油再生方法的功能成本分析
Chemistry, Technology and Application of Substances Pub Date : 2021-11-01 DOI: 10.23939/ctas2021.02.033
B. Korchak, O. Hrynyshyn, T. Chervinskyy, S. V. Pysh`yev
{"title":"Functional-cost analysis of methods of regeneration of used mineral motor oils","authors":"B. Korchak, O. Hrynyshyn, T. Chervinskyy, S. V. Pysh`yev","doi":"10.23939/ctas2021.02.033","DOIUrl":"https://doi.org/10.23939/ctas2021.02.033","url":null,"abstract":"The main methods of regeneration of used mineral motor oils, in particular physical, chemical, physicochemical methods are considered. The functional-cost analysis of methods of regeneration of the used mineral motor oils by means of branch experts is carried out. Functional-cost analysis is a method of pairwise comparisons and involves the process of ranking the selected characteristics according to the degree of importance (weight). To do this, each characteristic is assigned a certain index. As a result of the functional-cost analysis, the expediency of using technologies of vacuum distillation and hydrocracking of used oils in the processes of regeneration of used oils has been established.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81040726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Influence of ultrasound on the synthesis of silver nanoparticles by galvanic replacement in sodium polyacrylate solutions 超声对聚丙烯酸钠溶液中电取代法制备纳米银的影响
Chemistry, Technology and Application of Substances Pub Date : 2021-11-01 DOI: 10.23939/ctas2021.02.017
G. І. Zozulia, R. Mnykh, О. Kuntyi, А. S. Lapa
{"title":"Influence of ultrasound on the synthesis of silver nanoparticles by galvanic replacement in sodium polyacrylate solutions","authors":"G. І. Zozulia, R. Mnykh, О. Kuntyi, А. S. Lapa","doi":"10.23939/ctas2021.02.017","DOIUrl":"https://doi.org/10.23939/ctas2021.02.017","url":null,"abstract":"Sonogalvanic replacement and galvanic replacement synthesis of silver nanoparticles (AgNPs) by magnesium scrap in sodium polyacrylate solutions were studied. It was found that during these processes in NaPA solutions silver is practically not deposited on the magnesium surface. Sodium polyacrylate provides stabilization of AgNPs with the formation of yellow solutions with maximum absorption of ~415 nm. It is shown that sonogalvanic replacement synthesis of AgNPs occurs due to the simultaneous course of galvanic replacement by magnesium and sonoreduction of Ag (I) by radicals and reducing agents. The rate of sonogalvanic replacement synthesis of AgNPs is 20-30% higher compared to galvanic substitution by mechanical stirring.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89273340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Introduction of video resources in interactive learning of students specialty in chemical technologies and engineering during the covid-19 pandemic 新冠肺炎疫情期间化学技术与工程专业学生互动学习视频资源的引入
Chemistry, Technology and Application of Substances Pub Date : 2021-11-01 DOI: 10.23939/ctas2021.02.136
R. Bukliv, A. Helesh, O. H. Kurylets, S. V. Bukliv, L. Kropyvnytska
{"title":"Introduction of video resources in interactive learning of students specialty in chemical technologies and engineering during the covid-19 pandemic","authors":"R. Bukliv, A. Helesh, O. H. Kurylets, S. V. Bukliv, L. Kropyvnytska","doi":"10.23939/ctas2021.02.136","DOIUrl":"https://doi.org/10.23939/ctas2021.02.136","url":null,"abstract":"The main problems and difficulties that arose in the educational process after the introduction of quarantine regulations during the COVID-19 pandemic are considered. The most common online platforms used by teachers to conduct classes in video conferencing are described. The expediency of improving the methods of distance learning of students is noted. The main attention is focused on the technological advantages of the introduction of video resources in the interactive training of students of chemical and technological specialties, which is due to the specialization of the authors.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88836450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of chemical education and science in Lviv Polytechnic school (1877–1918) 利沃夫工业学校化学教育和科学的发展(1877-1918)
Chemistry, Technology and Application of Substances Pub Date : 2021-11-01 DOI: 10.23939/ctas2021.02.001
K. Blazhivskyi
{"title":"Development of chemical education and science in Lviv Polytechnic school (1877–1918)","authors":"K. Blazhivskyi","doi":"10.23939/ctas2021.02.001","DOIUrl":"https://doi.org/10.23939/ctas2021.02.001","url":null,"abstract":"On the 150th anniversary occasion of the Department of Chemical Technology at the Lviv Polytechnic National University founding, the activities of chemical departments and faculties at the time of Polytechnic School in 1877–1918 and the conditions of study of students was covered. Creation and transformation of chemical departments and the role of their leaders was considered. Scientific-pedagogical and public activities of famous scientists and teachers such as August Freund, Yulian Medvedskyi, Bronislaw Pawlewski, Roman Zaloziecki, Stefan Niementowski, Ignacy Moscicki, their contribution to development of Lviv Polytechnic and Galicia was characterized.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86065740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 electrode material on the electrochemical behavior of the absorbing solution of the quinhydrone method of gases purification from hydrogen sulfide 电极材料对硫化氢气体净化醌氢法吸收溶液电化学行为的影响
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.053
А. Slyuzar, І. P. Mertsalo, M. Kozub, P. V. Myliutyna, Y. Yakymenko
{"title":"Influence of electrode material on the electrochemical behavior of the absorbing solution of the quinhydrone method of gases purification from hydrogen sulfide","authors":"А. Slyuzar, І. P. Mertsalo, M. Kozub, P. V. Myliutyna, Y. Yakymenko","doi":"10.23939/ctas2021.01.053","DOIUrl":"https://doi.org/10.23939/ctas2021.01.053","url":null,"abstract":"The electrochemical behavior of carbonate solutions of the quinhydrone at different concentrations 1, 5, 10, 20, and 30 g/dm3 at the exposure time 0…12 days on different electrode materials – Ni and Au were studied by the cyclic voltammetry (CV) method. The catalytic properties of gold different from nickel in the anodic oxidation reactions of the quinhydrone catalyst are noted.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"514 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75234516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 polystyrene modifier on features of polyvinylchloride plastics production 聚苯乙烯改性剂对聚氯乙烯塑料生产特性的影响
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.166
D. Katruk, A. Masyuk, V. Levytskyi
{"title":"Influence of polystyrene modifier on features of polyvinylchloride plastics production","authors":"D. Katruk, A. Masyuk, V. Levytskyi","doi":"10.23939/ctas2021.01.166","DOIUrl":"https://doi.org/10.23939/ctas2021.01.166","url":null,"abstract":"The main methods of physical modification of PVC materials is the combination with other polymers, including PS plastic, and the creation of polymer (nano) composites containing metal and silicate fillers. Modification of polyvinyl chloride by polystyrene plastic leads to obtain materials with reduced degree of plasticizer release out of matter volume, adjustable elastic-plastic characteristics, and enhanced physico - mechanical and thermal properties. Physical modification of vinyl chloride polymers by other polymers or nanoscale particles of inorganic nature enables predictable affect on the morphology of these materials and directed regulate their technological and performance properties.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78757213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum-chemical modeling of the processes of cadmium sulfide and cadmium selenide films synthesis in aqueous solutions 水溶液中合成硫化镉和硒化镉薄膜过程的量子化学模拟
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.026
M. Sozanskyi, P. Shapoval, V. Stadnik, R. Guminilovych, O. P. Kurylo
{"title":"Quantum-chemical modeling of the processes of cadmium sulfide and cadmium selenide films synthesis in aqueous solutions","authors":"M. Sozanskyi, P. Shapoval, V. Stadnik, R. Guminilovych, O. P. Kurylo","doi":"10.23939/ctas2021.01.026","DOIUrl":"https://doi.org/10.23939/ctas2021.01.026","url":null,"abstract":"The quantum-chemical modeling of the synthesis process chemistry of CdS and CdSe in aqueos solutions was carried out. For that reason, the CdS synthesis simulation was carried out through the formation of Cd(II) complex forms with the trisodium citrate and ammonium hydroxide. At the CdSe synthesis, the sodium selenosulfate with and without trisodium citrate was used. It was established that this process passes through several intermediate stages with the transitional reactive complexes formation. On the basis of obtained data, the energy stages diagrams are constructed and the comparison of CdS and CdSe synthesis processes with various complexing agents has been carried out. The CdS and CdSe films were obtained by chemical synthesis method from an aqueous solution of cadmium salt, complexing and chalcogenizing agents. X-ray phase analysis confirmed the formation of desired compounds, which was predicted by modeling.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80105307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Іnvestigation of complex formation of cobalt (ІІ) ions with polyacrylic acid Іnvestigation钴离子(ІІ)与聚丙烯酸的络合形成
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.093
L. Oliynyk, О. І. Makota, Z. Komarenska, N. Bernatska
{"title":"Іnvestigation of complex formation of cobalt (ІІ) ions with polyacrylic acid","authors":"L. Oliynyk, О. І. Makota, Z. Komarenska, N. Bernatska","doi":"10.23939/ctas2021.01.093","DOIUrl":"https://doi.org/10.23939/ctas2021.01.093","url":null,"abstract":"The process of formation of cobalt (II) ion complexes with polyacrylic acid, their influence on the size of the tangle of polyacrylic acid macromolecules and the concentration of monomer units in it have been studied. It is shown that the reaction at a temperature of 20–300 ºC forms a complex in which the cobalt ion binds two carboxyl groups of polyacrylic acid. Binding of the third carboxyl group to the complex is prevented by a sufficiently flexible polyacrylic acid chain. Increasing the temperature significantly increases the flexibility of the polyacrylic acid chain. The formation of complexes at elevated temperature proceeds in the first order by cobalt (II) ion and hydroxyl ion and by zero order – by polyacrylic acid. The change in the concentration of monomer units in the tangle of polyacrylic acid macromolecules during the formation of a complex with a cobalt (II) ion proceeds in the first order.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88628517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sonoelectrochemical synthesis of silver nanoparticles in polyvinylpyrrolidone solutions 聚乙烯吡咯烷酮溶液中纳米银的超声电化学合成
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.082
M. Shepida, M. Sozanskyi, Yurii Sukhatskiy, A. Mazur, О. Kuntyi
{"title":"Sonoelectrochemical synthesis of silver nanoparticles in polyvinylpyrrolidone solutions","authors":"M. Shepida, M. Sozanskyi, Yurii Sukhatskiy, A. Mazur, О. Kuntyi","doi":"10.23939/ctas2021.01.082","DOIUrl":"https://doi.org/10.23939/ctas2021.01.082","url":null,"abstract":"The results of investigations of the influence of main parameters (surfactant concentration and temperature) on the synthesis of silver nanoparticles (AgNPs) by the sonoelectrochemical method in polyvinylpyrrolidone (PVP) solutions by cyclic voltammetry (CVA) are presented. It is shown that the ultrasonic field (22 kHz) leads to an increase in the anodic and cathodic currents by ~30 %. A scheme of the AgNPs formation has been proposed, which includes the following main processes: 1) dissolution of sacrificial silver anodes at E = 0.2...1.0 V with the formation of [AgPVP]+ complex ions; 2) cathodic and sonochemical reduction of the latter to Ag(0); 3) formation of AgNPs. It has been established that with an increase in PVP concentration from 1 to 4 g·L-1, the anodic and cathodic currents decrease by 40–60 %. The formation rate of AgNPs also decreases. The growth of anodic and cathodic currents and the formation rate of nanoparticles in the range of 20…60 °C corresponds to the diffusion-kinetic action of the temperature factor. The CVA curves practically do not change in time, which indicates the stability of anodic and cathodic processes at prolonged sonoelectrochemical synthesis. The character of the UV-Vis spectra of AgNPs colloidal solutions in PVP with the 405…410 nm absorption maximum is the same in a wide range of nanoparticle concentrations.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72894071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Obtaining of nanocomposites based on montmorillonite and polyamide in solution 蒙脱土-聚酰胺纳米复合材料的制备
Chemistry, Technology and Application of Substances Pub Date : 2021-06-01 DOI: 10.23939/ctas2021.01.172
V. Krasinskyi, O. Suberlyak, V. Zemke, M. V. Chekailo, M. Pankiv
{"title":"Obtaining of nanocomposites based on montmorillonite and polyamide in solution","authors":"V. Krasinskyi, O. Suberlyak, V. Zemke, M. V. Chekailo, M. Pankiv","doi":"10.23939/ctas2021.01.172","DOIUrl":"https://doi.org/10.23939/ctas2021.01.172","url":null,"abstract":"The method of obtaining nanocomposites based on polyamide-6 and montmorillonite intercalated by polyvinylpyrrolidone by precipitation from a solution in formic acid was developed in the work. The structure and physical interaction between the components of nanocomposites were studied by the methods of XRD, IR spectroscopic, and microscopic analyzes. The presence of polyvinylpyrrolidone in the structure of nanocomposites obtained from the solution was confirmed by IR spectroscopic analysis. Using SEM images, it was established that exfoliated montmorillonite particles with sizes from 100 to 200 nm are present in the structure of nanocomposites.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76485868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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