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Synthesis and Structure of Urea-Formaldehyde Oligomers with Peroxide Groups 过氧化基团脲甲醛低聚物的合成与结构
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.369
O. Astakhova, O. Shyshchak, M. Bratychak
{"title":"Synthesis and Structure of Urea-Formaldehyde Oligomers with Peroxide Groups","authors":"O. Astakhova, O. Shyshchak, M. Bratychak","doi":"10.23939/chcht15.03.369","DOIUrl":"https://doi.org/10.23939/chcht15.03.369","url":null,"abstract":"The possibility of synthesis in the presence of tert-butyl peroxymethanol (TBPM) or tert-butyl hydroperoxide (TBHP) of urea-formaldehyde oligomers with peroxide groups (UFOP) has been considered. Zinc oxide was used as the reaction catalyst. The effect of the initial components ratio, the reaction temperature and the process time on the characteristics and yield of the obtained oligomers was studied. Methods for obtaining UFOP using a mixture of TBPM and TBHP as a component are proposed. The structure of the synthesized UFOP was confirmed by IR- and NMR-spectroscopic studies.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"65 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86098876","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
Voltammetric Determination of Pd(II) Using 5-Hydroxyimino-4-imino-1,3-thiazolidin-2-one after a Thermal Activation of the Interaction 热活化作用后5-羟基亚胺-4-亚胺-1,3-噻唑烷-2-酮伏安法测定Pd(II
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.324
P. Rydchuk, O. Labyk, L. Oleksiv, O. Tymoshuk, T. Chaban
{"title":"Voltammetric Determination of Pd(II) Using 5-Hydroxyimino-4-imino-1,3-thiazolidin-2-one after a Thermal Activation of the Interaction","authors":"P. Rydchuk, O. Labyk, L. Oleksiv, O. Tymoshuk, T. Chaban","doi":"10.23939/chcht15.03.324","DOIUrl":"https://doi.org/10.23939/chcht15.03.324","url":null,"abstract":"The interaction of Pd(II) with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one (HITO) was investigated over the pH range of 1.0–10.0. Optimal conditions for the voltammetric determination of Pd(II) were established. A new voltammetric method of Pd(II) determination by the peak of complex using NaCl as a supporting electrolyte at pH 2.0 was developed with the limit of detection 2.0∙10-7 M. The study of the method’s selectivity was presented in the work. The correctness of the method was confirmed by the analysis of model solutions and the real sample (resistor SP5-35B).","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"68 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84591288","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
Investigation of Petroleum Bitumen Resistance to Aging 石油沥青耐老化性能的研究
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.438
O. Grynyshyn, M. Donchenko, Yurii Khlibyshyn, O. Poliak
{"title":"Investigation of Petroleum Bitumen Resistance to Aging","authors":"O. Grynyshyn, M. Donchenko, Yurii Khlibyshyn, O. Poliak","doi":"10.23939/chcht15.03.438","DOIUrl":"https://doi.org/10.23939/chcht15.03.438","url":null,"abstract":"Aging peculiarities of paving bitumen, which was obtained by different ways, have been studied. Oxidized and residual bitumen produced from oils of Ukrainian deposits were used and the changes in the main characteristics of bitumen after 5 and 10 h of aging in a thin film at the temperature of 436 K have been determined and the processes occurred during the aging have been studied. Using infrared spectroscopy, the changes in the structural composition of the binder during aging have been analyzed.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"26 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78718508","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: 5
The Influence of Sample pH on the Determination of Selected Carboxylic Acids by Isocratic Ion Chromatography 样品pH对等差离子色谱法测定所选羧酸的影响
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.319
Paulina Pecyna-Utylska, T. Konieczny, R. Michalski
{"title":"The Influence of Sample pH on the Determination of Selected Carboxylic Acids by Isocratic Ion Chromatography","authors":"Paulina Pecyna-Utylska, T. Konieczny, R. Michalski","doi":"10.23939/chcht15.03.319","DOIUrl":"https://doi.org/10.23939/chcht15.03.319","url":null,"abstract":"Validated isocratic ion chromatography method with suppressed conductivity detection has been developed for the simultaneously determination of common inorganic anions (F-, Cl-, NO3-, PO43-, SO42-), as well as formate and acetate. Liquid samples originate from absorption of gaseous by-products from coal combustion with and without the addition of medium-density fireboards. The influence of sample pH changes on carboxylic acids determination has been tested.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"69 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74166106","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
Kinetic Model for Dissolution of Cement Copper in Sulfuric Acid Solutions Containing Cupric Ions 水泥铜在含铜离子硫酸溶液中溶解动力学模型
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.395
N. Demirkıran, G. D. T. Özdemir
{"title":"Kinetic Model for Dissolution of Cement Copper in Sulfuric Acid Solutions Containing Cupric Ions","authors":"N. Demirkıran, G. D. T. Özdemir","doi":"10.23939/chcht15.03.395","DOIUrl":"https://doi.org/10.23939/chcht15.03.395","url":null,"abstract":"In this paper, the dissolution kinetics of cement copper powder in sulfuric acid solutions containing cupric ions was examined. It was observed that the dissolution rate of copper increased with increasing the acid concentration, temperature, and stirring speed. It was determined that the dissolution rate of copper enhanced with increasing the cupric ion concentration up to 0.025 M. It was found that the temperature and concentration of cupric ion had more considerable effects on the dissolution of copper powder. The kinetic analysis of the process was performed, and it was observed that it fits the first order pseudo-homogenous reaction model. The activation energy was calculated to be 31.1 kJ/mol.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"55 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75648150","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
Linear Hexane Isomerization Over Bimetallic Zeolite Catalysts 双金属沸石催化剂上的线性己烷异构化
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.330
L. Patrylak, O. Pertko, Y. Voloshyna, A. Yakovenko, V. Povazhnyi, O. Melnychuk, Kostyantyn Zlochevskyi
{"title":"Linear Hexane Isomerization Over Bimetallic Zeolite Catalysts","authors":"L. Patrylak, O. Pertko, Y. Voloshyna, A. Yakovenko, V. Povazhnyi, O. Melnychuk, Kostyantyn Zlochevskyi","doi":"10.23939/chcht15.03.330","DOIUrl":"https://doi.org/10.23939/chcht15.03.330","url":null,"abstract":"The aim of this study was to evaluate the activity and selectivity in isomerization of n-hexane of bimetallic zeolite catalysts containing a nickel transition metal in addition to palladium. Bimetallic bifunctional linear alkane isomerization catalysts based on the hydrogen form of MFI zeolite have been synthesized. The porous properties of the samples were investigated by means of low-temperature nitrogen adsorption/desorption, the size of the metal component – by TEM, and the catalytic properties – in the micro-pulse isomerization of n-hexane. Antisymbatic correlation between the temperature of the maximum yield of hexane isomers and the amount of nickel in the sample was found for a stable palladium content. The introduction of nickel allows to reduce the optimum process temperature from 598 to 523 K.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82579202","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
Electrosynthesis of Ni-Co/Hydroxyapatite as a Catalyst for Hydrogen Generation via the Hydrolysis of Aqueous Sodium Borohydride (NaBH4) Solutions 电合成Ni-Co/羟基磷灰石作为硼氢化钠(NaBH4)水解制氢催化剂的研究
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.389
A. Nur, A. W. Budiman, A. Jumari, N. Nazriati, F. Fajaroh
{"title":"Electrosynthesis of Ni-Co/Hydroxyapatite as a Catalyst for Hydrogen Generation via the Hydrolysis of Aqueous Sodium Borohydride (NaBH4) Solutions","authors":"A. Nur, A. W. Budiman, A. Jumari, N. Nazriati, F. Fajaroh","doi":"10.23939/chcht15.03.389","DOIUrl":"https://doi.org/10.23939/chcht15.03.389","url":null,"abstract":"To generate hydrogen from its storage as NaBH4, a catalyst was synthesized via an electrochemical method. The catalyst, Ni-Co, had hydroxyapatite as a support catalyst. The electrochemical cell consisted of a DC power supply, a carbon anode and cathode, and a bipolar membrane to separate the cell into two chambers. The current density was adjusted to 61, 91, and 132 mA/cm2. The electrolysis time was 30, 60, and 90 min. The particles produced were analyzed by XRD and SEM/EDX and tested in the hydrolysis of NaBH4 for hydrogen generation. The Ni-Co/HA catalyst test concluded that the period of time used for electrolysis during catalyst formation was positively correlated with the rate of NaBH4 hydrolysis in the production of hydrogen. The highest rate of hydrogen production was obtained using the synthesized catalyst with a current density of 92 mA/cm2. The NaBH4 hydrolysis reaction followed a first-order reaction with the rate constant of (2.220–14.117)•10-3 l/(g•min). The Arrhenius equation for hydrolysis reactions within the temperature range of 300–323 K is k = 6.5•10-6exp(-6000/T).","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"23 4 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82408410","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
Superacid ZrO2–SiO2–SnO2 Mixed Oxide: Synthesis and Study 超强酸ZrO2-SiO2-SnO2混合氧化物的合成与研究
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.336
S. Prudius, N. Hes, Volodymyr Trachevskiy, O. Khyzhun, V. Brei
{"title":"Superacid ZrO2–SiO2–SnO2 Mixed Oxide: Synthesis and Study","authors":"S. Prudius, N. Hes, Volodymyr Trachevskiy, O. Khyzhun, V. Brei","doi":"10.23939/chcht15.03.336","DOIUrl":"https://doi.org/10.23939/chcht15.03.336","url":null,"abstract":"Superacid ternary ZrO2 SiO2 SnO2 oxide has been synthesized by the sol-gel method with a different atomic ratio Zr:Si:Sn. The highest strength of acid sites has been observed in the ranges of 20 ≤ Zr4+ ≤ 29, 60 ≤ Si4+ ≤ 67, 11 ≤ Sn4+ ≤ 20 at.%. According to the XPS spectra and 119Sn, 29Si MAS NMR spectra of ZrO2 SiO2 SnO2 a partial shift of electron density from zirconium to silicon ions was observed resulting in the formation of superacid Lewis sites. It was shown that superacid Zr29Si60Sn11 mixed oxide efficiently catalyzes acylation of toluene with acetic anhydride at 423 K in a flow reactor with 45% conversion of anhydride at 100% selectivity towards p-methylacetophenone.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"88 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88267120","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: 4
Peculiarities of Dewatering Technology for Heavy High-Viscosity Crude Oils of Eastern Region of Ukraine 乌克兰东部重质高粘度原油脱水工艺特点
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.423
P. Topilnytskyy, T. Yarmola, V. Romanchuk, J. Kucińska-Lipka, Gdansk Poland G. Narutowicza St.
{"title":"Peculiarities of Dewatering Technology for Heavy High-Viscosity Crude Oils of Eastern Region of Ukraine","authors":"P. Topilnytskyy, T. Yarmola, V. Romanchuk, J. Kucińska-Lipka, Gdansk Poland G. Narutowicza St.","doi":"10.23939/chcht15.03.423","DOIUrl":"https://doi.org/10.23939/chcht15.03.423","url":null,"abstract":"High-viscosity crude oils from the Yablunivske field (Ukraine, Poltava region) have been studied. The oils were diluted with gas condensate to reduce viscosity, and then various demulsifiers were added. It was established that it is expedient to dilute oil with heavy gas condensate and dehydrate it with PM-1441 brand A non-ionogenic demulsifier, based on block copolymers of ethylene and propylene oxides. The dewatering degree was found to be 95 %.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"33 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73741686","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: 5
Establishment of the Regularities of the Concentrations Change of Microorganisms and Water-Soluble Compounds in Polluted Water after Ultrasound Treatment 超声处理后污水中微生物及水溶性化合物浓度变化规律的建立
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-08-15 DOI: 10.23939/chcht15.03.408
V. Starchevskyy, N. Bernatska, I. Typilo, Lilianna Oliynyk, O. Strogan
{"title":"Establishment of the Regularities of the Concentrations Change of Microorganisms and Water-Soluble Compounds in Polluted Water after Ultrasound Treatment","authors":"V. Starchevskyy, N. Bernatska, I. Typilo, Lilianna Oliynyk, O. Strogan","doi":"10.23939/chcht15.03.408","DOIUrl":"https://doi.org/10.23939/chcht15.03.408","url":null,"abstract":"The regularities of the change of the concentration of microorganisms and water-soluble organic compounds in the polluted water in the conditions of cavitation treatment and the influence of the amount of biological water pollution on the value of the chemical oxygen consumption are investigated.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"14 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82200769","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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