The phase composition of xerogel powders of the CaO–ZrO2–Nb2O5–SiO2 system after heat treatment at 1273 K with different Nb2O5 content was established. The temperatures of the physical and chemical processes occurring during the powders heating were determined. It was found that the complete replacement of ZrO2 by Nb2O5 resulted in the formation of niobium-containing phases with a change in the structure of the powders.
{"title":"Peculiarities of Phase Formation in Sol-Gel Powders of the СaО–ZrO2–Nb2O5–SiO2 System","authors":"Iryna Lutsyuk, Yaryna Gavryshkevych, Yaroslav Vakhula","doi":"10.23939/chcht17.03.495","DOIUrl":"https://doi.org/10.23939/chcht17.03.495","url":null,"abstract":"The phase composition of xerogel powders of the CaO–ZrO2–Nb2O5–SiO2 system after heat treatment at 1273 K with different Nb2O5 content was established. The temperatures of the physical and chemical processes occurring during the powders heating were determined. It was found that the complete replacement of ZrO2 by Nb2O5 resulted in the formation of niobium-containing phases with a change in the structure of the powders.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008707","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}
Peculiarities of the course of the methanesulfo-derivatives of (benzo)imidazo[2,1-b][1,3]thiazines reac-tions with a number of nucleophilic reagents were studied. It was determined that they react nonselectively with potassium thiocyanate to form a mixture of thio- and isothiocyanate derivatives. When interacting with sodium azide, nucleophilic substitution competes with an elimination reaction. The latter is dominant in the reaction with sodium cyanide. The spatial structure of one of the isomer elimination products, 4H-benzo[4,5]imidazo[2,1-b][1,3] thiazine, was established by X-ray structural analysis.
{"title":"Features of (Benzo)Imidazo[2,1-b][1,3]thiazine Mezylates Reaction with Nucleophilic Reagents","authors":"Nataliia Slyvka, Lesya Saliyeva, Mariia Litvinchuk, Svitlana Shishkina, Mykhailo Vovk","doi":"10.23939/chcht17.03.542","DOIUrl":"https://doi.org/10.23939/chcht17.03.542","url":null,"abstract":"Peculiarities of the course of the methanesulfo-derivatives of (benzo)imidazo[2,1-b][1,3]thiazines reac-tions with a number of nucleophilic reagents were studied. It was determined that they react nonselectively with potassium thiocyanate to form a mixture of thio- and isothiocyanate derivatives. When interacting with sodium azide, nucleophilic substitution competes with an elimination reaction. The latter is dominant in the reaction with sodium cyanide. The spatial structure of one of the isomer elimination products, 4H-benzo[4,5]imidazo[2,1-b][1,3] thiazine, was established by X-ray structural analysis.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010642","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}
Volodymyr Gunka, Myroslava Donchenko, Yuriy Demchuk, Iryna Drapak, Michael Bratychak
Modification of tars with formalin (37 % aqueous solution of formaldehyde) was carried out using various acids as process catalysts with the aim of obtaining new binding materials for road construction. H2SO4, HCl, H3PO4, and СH3COOH were used as catalysts. The modification process was carried out in the temperature range of 378-403 K and for a duration of 0.6-1.0 h. The rheological properties of tars modified with formaldehyde at 333, 343, and 353 K were studied and a comparison of the rheological properties of the obtained bituminous binder materials with oxidized bitumens was carried out.
{"title":"Production of Bitumen Modified with Low-Molecular Organic Compounds from Petroleum Residues. 8. Prospects of Using Formaldehyde Modified Tars in Road Construction","authors":"Volodymyr Gunka, Myroslava Donchenko, Yuriy Demchuk, Iryna Drapak, Michael Bratychak","doi":"10.23939/chcht17.03.701","DOIUrl":"https://doi.org/10.23939/chcht17.03.701","url":null,"abstract":"Modification of tars with formalin (37 % aqueous solution of formaldehyde) was carried out using various acids as process catalysts with the aim of obtaining new binding materials for road construction. H2SO4, HCl, H3PO4, and СH3COOH were used as catalysts. The modification process was carried out in the temperature range of 378-403 K and for a duration of 0.6-1.0 h. The rheological properties of tars modified with formaldehyde at 333, 343, and 353 K were studied and a comparison of the rheological properties of the obtained bituminous binder materials with oxidized bitumens was carried out.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010649","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}
Artur Onyshchenko, Roman Lisnevskyi, Ivan Viesich, Olha Poliak, Sergii Rybchynskyi, Eduard Shyshkin
This article deals with the results of the study on the effect of technological parameters of the Butonal NX4190 cationic polymer latex modification on the physical and mechanical properties of road bitumen and various types of hot dense asphalt concrete and crushed-mastic asphalt concrete. The modification technological parameters were the content of the modifier and the modification time. The modification temperature was constant. The optimal amount of polymer latex for modification was determined according to the criteria for improving the physical and mechanical properties of bitumen and asphalt concrete.
{"title":"Study on the Effect of Butonal NX4190 Polymer Latex on the Properties of Bitumen Binder and Asphalt Concrete","authors":"Artur Onyshchenko, Roman Lisnevskyi, Ivan Viesich, Olha Poliak, Sergii Rybchynskyi, Eduard Shyshkin","doi":"10.23939/chcht17.03.688","DOIUrl":"https://doi.org/10.23939/chcht17.03.688","url":null,"abstract":"This article deals with the results of the study on the effect of technological parameters of the Butonal NX4190 cationic polymer latex modification on the physical and mechanical properties of road bitumen and various types of hot dense asphalt concrete and crushed-mastic asphalt concrete. The modification technological parameters were the content of the modifier and the modification time. The modification temperature was constant. The optimal amount of polymer latex for modification was determined according to the criteria for improving the physical and mechanical properties of bitumen and asphalt concrete.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008711","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}
Tinatin Bukia, Mariam Utiashvili, Manana Tsiskarishvili, Sopo Jalalishvili, Ana Gogolashvili, Tamara Tatrishvili, Gia Petriashvili
New azo compounds on the base of 2,3,3-trimethyl-3H-indolenine were synthesized and characterized by FT-IR, NMR, and Mas-spectral analysis. The synthesis was conducted in three different pathways: 1) by reducing the nitro compound with Zn/NaOH in alcohol; 2) by heating of 2,3,3-trimethyl-3H-indolenine-5-amine in the presence of MnO2 in toluene, and 3) by diazotization of 2,3,3-trimethyl-3H-indolenine-5-amine and treating the resulting diazonium salt with the appropriate coupler.
{"title":"Synthesis of Some Azo Dyes Based on 2,3,3-Trimethyl-3H-indolenine","authors":"Tinatin Bukia, Mariam Utiashvili, Manana Tsiskarishvili, Sopo Jalalishvili, Ana Gogolashvili, Tamara Tatrishvili, Gia Petriashvili","doi":"10.23939/chcht17.03.549","DOIUrl":"https://doi.org/10.23939/chcht17.03.549","url":null,"abstract":"New azo compounds on the base of 2,3,3-trimethyl-3H-indolenine were synthesized and characterized by FT-IR, NMR, and Mas-spectral analysis. The synthesis was conducted in three different pathways: 1) by reducing the nitro compound with Zn/NaOH in alcohol; 2) by heating of 2,3,3-trimethyl-3H-indolenine-5-amine in the presence of MnO2 in toluene, and 3) by diazotization of 2,3,3-trimethyl-3H-indolenine-5-amine and treating the resulting diazonium salt with the appropriate coupler.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010644","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}
A new competitive class of grouting materials has been created. These lightweight grouting materials (LGM) with a density of 1370–1650 kg/m3 consist of oil-well Portland cement PCTI-100, fine powder of PE grade (a by-product of fireclay production from kaolin), acidic fly ash from state district power plants, and lime dust (a by-product of lime production). The composition of the products formed during LGM hydration was clarified by X-ray phase and differential thermal analysis. The rational optimal ratios of ingredients and temperature regimes for the LGM hardening were determined according to the criteria of cement stone strength.
{"title":"Development of Lightweight Grouting Materials Based on By-Products of Ukrainian Industry","authors":"Vitalii Orlovskyy, Volodymyr Biletskyi, Myroslav Malovanyy","doi":"10.23939/chcht17.03.666","DOIUrl":"https://doi.org/10.23939/chcht17.03.666","url":null,"abstract":"A new competitive class of grouting materials has been created. These lightweight grouting materials (LGM) with a density of 1370–1650 kg/m3 consist of oil-well Portland cement PCTI-100, fine powder of PE grade (a by-product of fireclay production from kaolin), acidic fly ash from state district power plants, and lime dust (a by-product of lime production). The composition of the products formed during LGM hydration was clarified by X-ray phase and differential thermal analysis. The rational optimal ratios of ingredients and temperature regimes for the LGM hardening were determined according to the criteria of cement stone strength.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010648","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}
According to the obtained experimental temperature dependences of the saturated vapor pressure on dimethylzinc – dimethyltelluride solutions with dimethylzinc content of 50.0 and 70.32 mol. %, isothermal sections (280, 290, 300, 310, and 320 K) were made. For the dimethylzinc – dimethyltelluride system based on a limited set of experimental data for the “liquid-vapor” equilibrium, the vapor composition was calculated according to the Duhem – Margules equation, as well as the partial pressures and the distribution coefficient.
{"title":"Method for Obtaining Isothermal Diagrams of the Liquid - Vapor Equilibrium for the System as Dimethyl Zinc - Dimethyl Telluride","authors":"Serhiy Gerasymchuk, Ihor Poliuzhyn, Valentyn Serheyev, Tetiana Hnativ","doi":"10.23939/chcht17.03.469","DOIUrl":"https://doi.org/10.23939/chcht17.03.469","url":null,"abstract":"According to the obtained experimental temperature dependences of the saturated vapor pressure on dimethylzinc – dimethyltelluride solutions with dimethylzinc content of 50.0 and 70.32 mol. %, isothermal sections (280, 290, 300, 310, and 320 K) were made. For the dimethylzinc – dimethyltelluride system based on a limited set of experimental data for the “liquid-vapor” equilibrium, the vapor composition was calculated according to the Duhem – Margules equation, as well as the partial pressures and the distribution coefficient.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008708","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}
Yuriy Prysiazhnyi, Oleg Grynyshyn, Serhiy Pyshyev, Bohdan Korchak, Michael Bratychak
To synthesize resins with oxygen-containing functional groups the C9 fractions of hydrocarbon pyrolysis, heavy gasoline, and light coal tar fraction obtained from coal coking liquid products (CCLP) were used. Various types of initiators and industrial monomers were obtained using the above-mentioned non-target and/or by-products of organic raw materials processing: by the initiated oligomerization method (from C9 fractions) – petroleum polymer resins with functional groups; by radical cooligomerization (from CCLP) (with RPKV) – coumarone-indene resins with functional groups. The influence of the main factors controlling the synthesis process of resins with functional groups on their quantitative and qualitative characteristics was studied, including the process temperature, duration, and the reaction mixture composition. The structure of the synthesized resins was analyzed by IR spectroscopy, and the presence of epoxy, carboxyl, hydroxyl, and methacrylate functional groups was confirmed.
{"title":"Resins with Oxygen-Containing Functional Groups Obtained from Products of Fossil Fuels Processing: A Review of Achievements","authors":"Yuriy Prysiazhnyi, Oleg Grynyshyn, Serhiy Pyshyev, Bohdan Korchak, Michael Bratychak","doi":"10.23939/chcht17.03.574","DOIUrl":"https://doi.org/10.23939/chcht17.03.574","url":null,"abstract":"To synthesize resins with oxygen-containing functional groups the C9 fractions of hydrocarbon pyrolysis, heavy gasoline, and light coal tar fraction obtained from coal coking liquid products (CCLP) were used. Various types of initiators and industrial monomers were obtained using the above-mentioned non-target and/or by-products of organic raw materials processing: by the initiated oligomerization method (from C9 fractions) – petroleum polymer resins with functional groups; by radical cooligomerization (from CCLP) (with RPKV) – coumarone-indene resins with functional groups. The influence of the main factors controlling the synthesis process of resins with functional groups on their quantitative and qualitative characteristics was studied, including the process temperature, duration, and the reaction mixture composition. The structure of the synthesized resins was analyzed by IR spectroscopy, and the presence of epoxy, carboxyl, hydroxyl, and methacrylate functional groups was confirmed.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008713","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}
Khiouani Adel, Hachani Salah Eddine, Meklid Abdelhek
The present paper aims to study the feasibility of using an activated carbon prepared by Juniperus thurifera tree as an adsorbent to remove phenol from water by adsorption. The impact of initial phenol concentration, contact time, pH, and adsorbent mass on phenol adsorp-tion capacity was investigated. It was reported that the highest adsorption capacity is achieved at pH=3.4, phenol concentration of 50 mg/L, adsorbent mass of 100 mg, and time 24 h. Freundlich, Langmuir, and Temkin isotherm equations were used to best fit our experimental data. Hence, Freundlich model was found to be the best model with R2 = 0.9893. The thermodynamic results revealed that the adsorption of phenol onto the activated carbon was spontaneous and exothermic. Furthermore, the adsorption kinetic study indicated that the adsorption process follows the pseudo-first-order kinetic model.
{"title":"Removal of Phenol from Water Using an Activated Carbon Prepared from Juniperus Thurifera Tree","authors":"Khiouani Adel, Hachani Salah Eddine, Meklid Abdelhek","doi":"10.23939/chcht17.03.636","DOIUrl":"https://doi.org/10.23939/chcht17.03.636","url":null,"abstract":"The present paper aims to study the feasibility of using an activated carbon prepared by Juniperus thurifera tree as an adsorbent to remove phenol from water by adsorption. The impact of initial phenol concentration, contact time, pH, and adsorbent mass on phenol adsorp-tion capacity was investigated. It was reported that the highest adsorption capacity is achieved at pH=3.4, phenol concentration of 50 mg/L, adsorbent mass of 100 mg, and time 24 h. Freundlich, Langmuir, and Temkin isotherm equations were used to best fit our experimental data. Hence, Freundlich model was found to be the best model with R2 = 0.9893. The thermodynamic results revealed that the adsorption of phenol onto the activated carbon was spontaneous and exothermic. Furthermore, the adsorption kinetic study indicated that the adsorption process follows the pseudo-first-order kinetic model.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010641","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}
The novelty of the work is the theoretical justification and experimental confirmation of the mechanism of interaction of Fe3O4 nanoparticles with Н2О and ovalbumin-OVA, which was carried out with the help of a complex of physical and chemical studies. It was determined that the mechanism is based on the clustero-philicity of nanoparticles and hydrogen, electrostatic and van der Waals interactions. It was established that the interaction of Fe3O4 nanoparticles with OVA took place by the mechanism of static quenching with the formation of an intermolecular non-fluorescent complex that chan¬ges the native structure of OVA. The binding constant varied from 3.3×105 to 4.8×105 L•mol-1 depending on the pH value of the medium and temperature. Thermo¬dy¬namic calculations confirmed the spontaneity of the bin¬ding process with the predominance of the enthalpy factor.
{"title":"Physico-Chemical Studies of the Interaction Mechanism of Double and Trivalent Iron Double Oxide Nano-Particles with Serpin Protein Ovalbumin and Water","authors":"Iryna Iryna Tsykhanovska, Mykola Riabchykov, Olexandr Alexandrov, Victoriya Evlash, Oksana Bryzytska, Sergey Gubsky, Tatyana Lazareva, Olga Blahyi","doi":"10.23939/chcht17.03.481","DOIUrl":"https://doi.org/10.23939/chcht17.03.481","url":null,"abstract":"The novelty of the work is the theoretical justification and experimental confirmation of the mechanism of interaction of Fe3O4 nanoparticles with Н2О and ovalbumin-OVA, which was carried out with the help of a complex of physical and chemical studies. It was determined that the mechanism is based on the clustero-philicity of nanoparticles and hydrogen, electrostatic and van der Waals interactions. It was established that the interaction of Fe3O4 nanoparticles with OVA took place by the mechanism of static quenching with the formation of an intermolecular non-fluorescent complex that chan¬ges the native structure of OVA. The binding constant varied from 3.3×105 to 4.8×105 L•mol-1 depending on the pH value of the medium and temperature. Thermo¬dy¬namic calculations confirmed the spontaneity of the bin¬ding process with the predominance of the enthalpy factor.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008714","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}
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