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Journal articles on the topic 'Azeotropic rectification'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Schastnyy, Y. O., N. A. Romanova, and R. R. Gizatullin. "Evaluation of the possibility of separating commercial phenol from the phenolic fraction of coal tar." E3S Web of Conferences 266 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202126602011.

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This article is about the possibility of concentrating commercial coal phenol with a concentration of 99% by the weight method of rectification from the phenolic fraction of coal tar. The sufficiency of phenol is ensured by the kumol method, however, the consumption of phenol increases. Modeling of the vapor-liquid equilibrium of double and triple mixtures of components using the NRTL model showed the presence of the following positive homogeneous azeotropic mixtures: phenol-indane, phenol-indene. Modeling of the vapor-liquid equilibrium of double and triple mixtures of components using the NR

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2

Milojevic, Svetomir. "Separation processes, I: Azeotropic rectification." Chemical Industry 59, no. 5-6 (2005): 141–50. http://dx.doi.org/10.2298/hemind0506141m.

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In a series of two articles, the problems of azeotrope separation (part I) and the design of separation units (part II) were analyzed. The basic definition and equations of vapour-liquid equilibria for ideal and non-ideal systems, the importance of the activity coefficient calculation necessary for the analysis of non-ideal equilibrium systems, as well as theoretical aspects of azeotrope rectification and the determination of the optimal third component (modifier or azeotrope agent) are presented in the first part.

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3

Bedretdinov, F. N., and T. V. Chelyuskina. "RESEARCH OF VARIOUS ISO-MANIFOLDS IN FOUR COMPONENT SYSTEMS CONTAINING BIAZEOTROPIC BINARY CONSTITUENTS." Fine Chemical Technologies 13, no. 1 (2018): 45–54. http://dx.doi.org/10.32362/2410-6593-2018-13-1-45-54.

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In the present work, an analysis of the mutual arrangement of a number of iso-manifolds in the concentration tetrahedron formed by the components of the separated mixture and an additional substance, an extractive agent, was carried out to estimate the possibility of separating three-component mixtures containing biazeotropic constituents by extractive rectification. The objects of research were four-component systems formed by ternary constituents (butyl propionate (BP) - propionic acid (PA) - butyl butyrate (BB), butyl propionate - propionic acid - butyric acid (BA), butyl butyrate - butyric

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4

Aliyeva, Sh D., F. M. Sadigov, and M. R. Manafov. "CATALYTIC PROCESSING OF LIGHT PYROLYSIS RESIN, A BY-PRODUCT OF ETHYLENE PRODUCTION, AND SEPARATION TECHNOLOGY OF HIGH-PURITY BENZENE." Azerbaijan Chemical Journal, no. 1 (February 10, 2025): 91–104. https://doi.org/10.32737/0005-2531-2025-1-91-104.

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The composition of light pyrolysis resin was studied in detail and it was determined that mass fraction of aromatic hydrocarbons, especially benzene and toluene, is high compared to other hydrocarbons. The catalytic treatment was carried out with an aluminum complex catalyst based on toluene, synthesized in the laboratory, and the mass fraction of benzene in the light resin was increased. The optimal mode of the process corresponding to the maximum increase of benzene has been determined. At the next stage of the research, the benzene fraction was separated by rectification, and high purity be

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5

Alekseev, K. A., D. R. Latypov, and E. A. Lapteva. "SEPARATION OF A MULTICOMPONENT MIXTURE BY PERIODIC AZEOTROPIC RECTIFICATION: MODELING AND EXPERIMENT." Herald Of Technological University 26, no. 1 (2023): 53–57. http://dx.doi.org/10.55421/1998-7072_2023_26_1_53.

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6

Milosavljevic, Milutin, Aleksandar Marinkovic, Jelena Markovic, Danijela Brkovic, and Milan Milosavljevic. "Synthesis of tetraalkyl thiuram disulfides using different oxidants in recycling solvent mixture." Chemical Industry and Chemical Engineering Quarterly 18, no. 1 (2012): 73–81. http://dx.doi.org/10.2298/ciceq110726048m.

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A new optimized laboratory synthesis of tetraalkyl thiuram disulfides, starting from dialkyl amines and carbon disulfide in presence of three oxidants (hydrogen peroxide, potassium peroxodisulfate and sodium hypochlorite) and appropriate reaction medium: two mixtures of isopropyl alcohol - water used in two consecutive syntheses, was presented in this work. First synthesis was performed in a recycled azeotropic mixture of isopropyl alcohol - water 87.7% - 12.3%, and second in a filtrate obtained after first synthesis, which was a mixture of isopropyl alcohol - water 70.4% - 29.6%. After the se

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7

MALYGIN, A. V., A. V. KLINOV, A. R. KHAIRULLINA, and A. R. SAFINA. "INFLUENCE OF EXTRACTIVE AGENTS ON DENSITY AND VISCOSITY OF LIQUID PHASE DURING RECTIFICATION OF ISOPROPANOL-WATER MIXTURE." Herald of Technological University 27, no. 1 (2024): 30–35. http://dx.doi.org/10.55421/1998-7072_2024_27_1_30.

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In this work, the dynamic viscosity and density of three-component mixtures consisting of a binary azeotropic mixture of isopropanol-water and an extractive agent were investigated. Three points of the profile of concentrations in the liquid phase in the extractive separation column of isopropanol-water mixture in recalculation on the pseudobinary mixture were selected for research: the first point - 95/5 % wt. %; the second point - 5/95 % wt. %; the third azeotrope point - 88/12 % wt. %. For the selected points model mixtures were prepared to which 13 % wt. % of the extractive agent was added

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8

Klinov, Alexander V., Alexander V. Malygin, Alina R. Khairullina, Sergey E. Dulmaev, and Ilsiya M. Davletbaeva. "Alcohol Dehydration by Extractive Distillation with Use of Aminoethers of Boric Acid." Processes 8, no. 11 (2020): 1466. http://dx.doi.org/10.3390/pr8111466.

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Aminoethers of boric acid (AEBA) were studied as potential extractants for the separation of aqueous–alcoholic azeotropic mixtures by extractive distillation. The conditions of vapor–liquid equilibrium in aqueous solutions of ethanol and isopropanol in the presence of AEBA were studied. The division of AEBA molecules into group components was proposed, and previously unknown geometric parameters of the boron group and the energetic pair parameters of the boron group with the alkane group, ether group, amine-3d group, and alcohol group were determined within the framework of the Universal Funct

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9

KLINOV, А. V., A. R. KHAIRUL LINA, and A. F. GABIDULLIN. "THE INFLUENCE OF DEEPLY EUTECTIC SOLVENTS WITH GLYCERIN ON THE RELATIVE VOLATILITY OF COMPONENTS IN AN ETHANOL-WATER MIXTURE." Herald of Technological University 28, no. 6 (2025): 81–85. https://doi.org/10.55421/3034-4689_2025_28_6_81.

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The effect of deep eutectic solvents (DES), a mixture of glycerol with triethanolamine, urea and glucose, on the relative volatility of the components of an aqueous ethanol solution was investigated. Based on the open evaporation method, experimental studies of the vapor-liquid phase equilibrium conditions of the ethanol-water system with the addition of DES were carried out. The behavior of the residual concentration lines shows that the addition of DES increases the relative volatility of ethanol, which leads to its faster depletion in the cube. Modeling of the vapor-liquid phase equilibrium

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10

Demiral, H., and M. Ercengiz Yildirim. "Recovery of acetic acid from waste streams by extractive distillation." Water Science and Technology 47, no. 10 (2003): 183–88. http://dx.doi.org/10.2166/wst.2003.0570.

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Wastes have been considered to be a serious worldwide environmental problem in recent years. Because of increasing pollution, these wastes should be treated. However, industrial wastes can contain a number of valuable organic components. Recovery of these components is important economically. Using conventional distillation techniques, the separation of acetic acid and water is both impractical and uneconomical, because it often requires large number of trays and a high reflux ratio. In practice special techniques are used depending on the concentration of acetic acid. Between 30 and 70% (w/w)

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11

Chicheva, D. S., E. L. Krasnykh, and V. A. Shakun. "Kinetic regularities of neopentyl glycol esterification with acetic and 2-ethylhexanoic acids." Fine Chemical Technologies 19, no. 1 (2024): 28–38. http://dx.doi.org/10.32362/2410-6593-2024-19-1-28-38.

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Objectives. Development of a domestic technology for producing environmentally friendly non-phthalate plasticizers, lubricants and transformer fluids based on neopentyl glycol (NPG), an oxo-synthesis product.Methods. The methodology of the work was to study the kinetic laws of NPG esterification with acetic and 2-ethylhexanoic acids under self-catalysis conditions with an 8-fold molar excess of monocarboxylic acids. The production of NPG esters was carried out by azeotropic esterification in the presence of solvents—benzene and m-xylene. The resulting diesters were isolated from the reaction m

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12

Babak, Tatiana, Sergey Bykanov, Constantine Gorbunov, Eugenia Ponomarenko, and Lyudmila Solovey. "STREAMS HEAT INTEGRATION IN THE SEPARATION PROCESS OF THE FURFURAL-WATER HETEROAZEOTROPIC MIXTURE BY USING TWO STRETCHING COLUMNS." Integrated Technologies and Energy Saving, no. 1 (December 6, 2023): 3–13. http://dx.doi.org/10.20998/2078-5364.2023.1.01.

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The process of azeotropic mixtures rectification takes place in many branches of the chemical industry. This process requires significant energy consumption both for heating and evaporation of process streams, and for vapor condensation and cooling of products. The consumption of external energy essentially depends on the methods of separation processes organization. Pinch analysis is one of the modern methods for designing chemical-technological systems with the aim of optimal use of external energy sources by maximizing the heat integration of system process streams, taking into account the

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13

Frolkova, A. V., M. A. Ablizin, M. A. Mayevskiy, and A. K. Frolkova. "The multivariate calculation of material balances of flowsheets for separating ternary mixtures of different physical-chemical nature." Fine Chemical Technologies 11, no. 3 (2016): 47–57. http://dx.doi.org/10.32362/2410-6593-2016-11-3-47-57.

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An approach to the determination of free variables required for calculating the material balance of the flowsheet of ternary mixtures separation is presented. Phase diagrams of the considered ternary systems are characterized by the presence of a two-phase splitting area and by the presence of different amounts of azeotropes (classes 3.1.0, 3.1.1, 3.2.1 and 3.3.1). For all the systems flowsheets containing three rectification columns and a florentine vessel for separation were suggested. The multivariance of the solution of the balance problem was shown. The approach was illustrated by the exa

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14

Li, Hongshen, Hongrui Liu, Yufang Li, Jilin Nan, Chen Shi, and Shizhong Li. "Combined Vapor Permeation and Continuous Solid-State Distillation for Energy-Efficient Bioethanol Production." Energies 14, no. 8 (2021): 2266. http://dx.doi.org/10.3390/en14082266.

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Extracting ethanol by steam directly from fermented solid-state bagasse is an emerging technology of energy-efficient bioethanol production. With continuous solid-state distillation (CSSD) approach, the vapor with more than 25 wt% ethanol flows out of the column. Conventionally, the vapor was concentrated to azeotrope by rectification column, which contributes most of the energy consumption in ethanol production. As an alternative, a process integrating CSSD and vapor permeation (VP) membrane separation was tested. In light of existing industrial application of NaA zeolite hydrophilic membrane

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15

Феофанова, Мариана Александровна, Юлия Ивановна Софронова, Андрей Николаевич Евдокимов, and Александр Вячеславович Курзин. "APPLICATION OF IMIDAZOLINES BASED ON TALL OIL FATTY ACIDS AND THEIR QUATERNARY SALTS FOR THE SEPARATION OF THE BINARY NON-AQUEOUS AZEOTROPE SYSTEMS." Вестник Тверского государственного университета. Серия: Химия, no. 4(42) (December 21, 2020): 63–69. http://dx.doi.org/10.26456/vtchem2020.4.7.

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Методом экстрактивной (в том числе солевой) ректификации с использованием имидазолинов и четвертичных солей на их основе разделены на компоненты неводные двойные азеотропные системы. В качестве разделяющих агентов выбраны: промышленный продукт 1-гидроксиэтил-2-алкенил-2-имидазолин на основе жирных кислот таллового масла, а также его четвертичные соли - хлорид и тетрафторборат 1-гидроксиэтил-2-алкенил-3-бензил-2-имидазолиния. Для разделения были использованы неводные азеотропные системы: ацетон-метанол, метилацетат-метанол, этилацетат-этанол и хлороформ-метанол. Равновесие жидкость-пар в соотве

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16

Mukhitdinov, Djaloliddin, Yorkin Kadirov, Akbar Abrorov, and Malika Tukhtamishova. "Method for determining estimates of random variable models for describing phase equilibrium in rectification processes." E3S Web of Conferences 486 (2024): 03021. http://dx.doi.org/10.1051/e3sconf/202448603021.

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The phase equilibrium modeling for multi-component systems is essential in process systems engineering. In particular, phase stability analysis, Gibbs free energy minimization and estimation of parameters in thermodynamic models are challenging global optimization problems involved in phase equilibrium calculations and modeling for both reactive and non-reactive systems. To date, many significant works have been performed in the area of global optimization, and several algorithms and computational contributions of global optimization have been used for solving these problems; global optimizati

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17

Haiou, Wang, Xu Yang, Sang Weihe, Li Hao, and Fang Jing. "Extractive rectification using DES for benzene‐cyclohexane‐cyclohexene ternary azeotropic system." Journal of Chemical Technology & Biotechnology, December 10, 2024. https://doi.org/10.1002/jctb.7774.

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AbstractBACKGROUNDBenzene, cyclohexane, and cyclohexene are ternary azeotropic systems, which cannot achieve high‐purity separation by ordinary distillation, but this issue can be solved by extractive distillation. Deep Eutectic Solvents (DES) is a ‘green solvent’ that has emerged in recent years and is often used as an extractant.RESULTSIn this study, the COSMO‐SAC solvation model was used to calculate the infinite dilution activity coefficients (γ∞) of DES with different compositions to screen suitable DES, and the effect was demonstrated by vapor–liquid equilibrium experiment (VLE). In addi

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18

Makhmudov, M.J., A.A Saloydinov, and J.J. Ergashev. "METHOD FOR REDUCING AROMATIC HYDROCARBONS IN COMPOSITION OF GASOLINE." December 21, 2022. https://doi.org/10.5281/zenodo.7467935.

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In recent years, with an increasing number of ground vehicles with internal combustion engines, the need for fuel, including motor gasoline, has increased significantly. It is known that during the operation of vehicles, a large number of exhaust gases are emitted into the atmosphere, containing such substances as carbon oxides, nitrogen oxides and benzapyrenes. The main source of education benzapyrene are aromatic hydrocarbons, primarily benzene. In this regard, the content of aromatic hydrocarbons in motor gasoline is subject to strict environmental requirements Euro-5. As the object of rese

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19

Meshram, Isha. "Study of Novel Separation Technique 'Pervaporation' for Separation of Acetronitrile and Tetrahydrofuran from waste Stream." International Journal of Scientific Research in Science and Technology, August 25, 2021, 698–703. http://dx.doi.org/10.32628/ijsrst2184108.

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Pervaporation is a very effective membrane process for the separation of liquid mixtures. Due to its economics, efficiency and simplicity, it can easily be integrated into the distillation and rectification processes and, depending on the specific operating parameters, even partially replace them. Pervaporation technology can effectively recovery acetonitrile from the waste stream and separate a tetrahydrofuran (THF) solvent-water waste stream. Pervaporation technique was used for the mixture of close boiling point and to break the azeotrope in the most economical way. The combination of Disti

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