journal of chemistry and chemical engineering最新文献

SYNTHESIS AND SPECTROSCOPIC STUDY OF COMPLEX COMPOUNDS MN (II), CO (II), CU (II) AND ZN WITH 5-AMINO-2-MERCAPTOBENZIMIDAZOLE 5-氨基-2-巯基苯并咪唑配合物mn (ii)、co (ii)、cu (ii)和zn的合成及光谱研究

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce202143

引用次数: 0

DETERMINATION OF THE STABILITY OF COMPLEX COMPOUNDS OF COPPER (II), ZINC (II), CADMIUM (II) AND SILVER (I) WITH COVALENTLY IMMOBILIZED SULFUR CONTAIN LIGANDS 铜(ii)、锌(ii)、镉(ii)和银(i)与共价固定含硫配体配合物的稳定性测定

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce202144

S. Kasimov, Termez

{"title":"DETERMINATION OF THE STABILITY OF COMPLEX COMPOUNDS OF COPPER (II), ZINC (II), CADMIUM (II) AND SILVER (I) WITH COVALENTLY IMMOBILIZED SULFUR CONTAIN LIGANDS","authors":"S. Kasimov, Termez","doi":"10.51348/cce202144","DOIUrl":"https://doi.org/10.51348/cce202144","url":null,"abstract":"\"The purpose of this study is to determine the stability of the obtained coordination compounds of some d-metals with covalent immobilized sulfur-containing ligands. To achieve this goal, coordination compounds of copper (II), zinc (II), cadmium (II) and silver (I) ions with covalent immobilized sulfur-containing ligands - О,О-di- (2-aminoethyl) -dithiophosphate potassium - polyester matrix (KD2AEDTP-PEM), O,O-di- (2-aminoethyl) -dithiophosphate potassium - carbamide-formaldehyde matrix (KD2AEDTP-KFM). Studies were carried out to determine the acid-base properties of covalent-immobilized sulfur-containing ligands - KD2AEDTP-PEM, KD2AEDTP-KFM and the concentration stability of the obtained coordination compounds with ions of copper (II), zinc (II), cadmium (II), and silver (I). Based on the results of integral and differential potentiometric titrations, it was established that the ionization constants (pK) of the dithiophosphoric group in KD2AEDTP-PEM and KD2AEDTP-KFM are 3.23 and 3.35, and the ionization constants of the amino group are 9.76 and 9.63, respectively. As a result of studies of polymer ligands by potentiometric titration via the method of individual weighed portions, it was shown that polyfunctional polymer ligands have the ability to form stable coordination compounds with metal ions of copper (II), zinc (II), cadmium (II) and silver (I). \u0000\"","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87916749","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

FEATURES OF THE FORMATION OF THE COATING STRUCTURE ON TITANIUM-BASED ALLOYS 钛基合金涂层组织形成的特征

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce202141

{"title":"FEATURES OF THE FORMATION OF THE COATING STRUCTURE ON TITANIUM-BASED ALLOYS","authors":"","doi":"10.51348/cce202141","DOIUrl":"https://doi.org/10.51348/cce202141","url":null,"abstract":"Previously shown that coatings formed on titanium by plasma electrolytic oxidation (PEO) in an electrolyte with zirconium sulfate Zr(SO4)2 consisted of ZrO2 and TiO2 oxides, their surface layer is enriched with zirconium, they have good protective properties in chlorine-containing media. The resulting layers have a fairly regular distribution of relatively small pores, with a diameter of about 1 μm or less, on the surface. The composition and structure of PEO layers depend on both the composition of the electrolyte and the modes of formation. It is of scientific and practical interest to elucidate the effect of the conditions for the formation of coatings with ZrO2 on titanium and its alloys on their anticorrosive properties in chlorine-containing media. Samples for research were formed under anodic (unipolar) conditions at the same current density and different formation times. The samples were formed in modes with current density 0.08 A/cm2 and processing time (minutes) − 8.5; 9.5; 10; 11; 12; 13; 14; 15; 20; 30; 40; 60. The duration of treatment was chosen as to maximally repeat the anticorrosive characteristics obtained in the previous case. The work uses modern research methods, including electron microscopy, presents the results of further study of ZrO2 + TiO2 / Ti systems formed in an electrolyte with zirconium sulfate Zr(SO4)2. It has been established that coatings are formed on titanium and its alloys in an electrolyte with zirconium sulfate under galvanostatic conditions of the PEO process at i = 0.08 A / cm2 during a processing time of 11-15 min. There is a correlation between the stages of galvanostatic formation of coatings and their anticorrosive properties.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"496 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89488324","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

ACTIVATION OF WATER USED IN THE PREPARATION OF WHEAT GRAIN FOR VARIETAL MILLING 用于品种碾磨的小麦籽粒制备中的水的活化

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce2021411

S. Ravshanov, I. Isabaev

引用次数: 0

STUDY OF THE EVAPORATION PROCESS OF MOTHER LIQUORS IN THE PRODUCTION OF POTASSIUM NITRATE 硝酸钾生产母液蒸发过程的研究

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce202142

{"title":"STUDY OF THE EVAPORATION PROCESS OF MOTHER LIQUORS IN THE PRODUCTION OF POTASSIUM NITRATE","authors":"","doi":"10.51348/cce202142","DOIUrl":"https://doi.org/10.51348/cce202142","url":null,"abstract":"\"The aim was to study the influence of the main technological parameters on the process of evaporation off the primary mother liquors of the filtration process of a potassium nitrate suspension formed as a result of crystallization of the conversion solution at a temperature of 0 °C.\u0000 A theoretical analysis of the system diagram and experimental data established the sequence of the formation of components during the evaporation of mother liquors. At the same time, in the studied intervals of variation of the parameters, potassium chloride is formed first, and then, the joint crystallization of potassium and ammonium chlorides occurs with the continuation of the evaporation process, and when the evaporation degree is more than 30-35%, the joint crystallization of potassium, ammonium and potassium nitrate chlorides occurs.\u0000 The process analytical parameters influence of the ratio of the primary mother liquor and ammonium nitrate, as well as, the degree of evaporation have been studied.\u0000 A nomogram has been developed showing the dependence of the input and output parameters on the value of the residual pressure, and it makes possible to determine the values of the evaporation degree at given conditions. \u0000\"","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83161155","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

PERFORMANCE CHARACTERISTICS OF PAINT AND VARNISH MATERIALS FOR MARKING ROADS BASED ON LOCAL RAW MATERIALS 基于当地原材料的道路标线用油漆和清漆材料的性能特性

journal of chemistry and chemical engineering Pub Date : 2021-12-20 DOI: 10.51348/cce202149

R. Khakimov, D. Ayrapetov, Timur Omonkulov

引用次数: 0

COMPUTER SIMULATION OF PARTICLE VELOCITY IN A CYCLONE 旋风中粒子速度的计算机模拟

journal of chemistry and chemical engineering Pub Date : 2021-09-28 DOI: 10.51348/stpt7139

A. Artikov, Dilshod Karabaev

{"title":"COMPUTER SIMULATION OF PARTICLE VELOCITY IN A CYCLONE","authors":"A. Artikov, Dilshod Karabaev","doi":"10.51348/stpt7139","DOIUrl":"https://doi.org/10.51348/stpt7139","url":null,"abstract":"The article sets the goal of determining and calculating the speed of accelerated movement of particles in the gas-dust flow of an air cyclone, depending on the size of the cyclone, the physical properties of the particle and the gas-dust flow. A method for constructing a computer model of the motion of a particle in a roaring gas-dust flow of a cyclone is presented. The sequence of formalization of the computer model of the process of sedimentation of particles of a gas-dust flow of a cyclone unit is based on the theoretical foundations of aerodynamics and touches on the most significant aspects of the development of a cyclone. Attention paid to the analysis of the dynamics of particle motion in a centrifugal field, accelerated motion and a realistic estimate of the particle velocity. The mutual influences of five forces are considered. This is the centrifugal force, the force of resistance of the gas-dust flow, the forces of gravity, the Archimedean force and the force of inertia, acting on the accelerating motion of the particle in the flow. On the basis of the block principle, a general computer model of the cycloning process is built, which makes it possible to calculate the uneven velocity of a particle in a gas-dust flow. Analytical methods for evaluating the acceleration parameters and the main methods of numerical analysis of the dynamics of particle motion, shows that the main advantage of up to 0.8 seconds is the accelerated motion of a particle in a gas-dust flow under the given conditions. During this time, most of the particles reach the cyclone wall. This shows that the determination of the accelerating motion of a particle plays an important role in cyclones.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"2019 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87792731","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 SULFUR MODIFICATION ON THE PROPERTIES OF SULFUR CONCRETE 硫改性对含硫混凝土性能的影响

journal of chemistry and chemical engineering Pub Date : 2021-09-28 DOI: 10.51348/foxy9665

Zhavkhar Khayitova, Kh.S. Beknazarov, Hayit Turaev, A. Jalilov

引用次数: 1

OBTAINING OF BACTERIAL POLYSACCHARIDES 细菌多糖的获取

journal of chemistry and chemical engineering Pub Date : 2021-02-26 DOI: 10.51348/yota9343

Kulonov Abdulaziz, Mirzarakhmetova Dilbar

引用次数: 0

EFFECT OF LIGHT ON THE RESISTANCE OF Bi/Pb SUPERCONDUCTORS SYNTHESIZED BY SOLAR ENERGY 光对太阳能合成的Bi/Pb超导体电阻的影响

journal of chemistry and chemical engineering Pub Date : 2021-02-26 DOI: 10.51348/qyzx3051

Gulamova Dilbara, O. Kimy

引用次数: 0