Relevant bibliographies by topics / Cyclohexane Separation

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Cyclohexane Separation'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Cyclohexane Separation"

1

Karpińska, M., M. Wlazło, D. Ramjugernath, P. Naidoo, and U. Domańska. "Assessment of certain ionic liquids for separation of binary mixtures based on gamma infinity data measurements." RSC Advances 7, no. 12 (2017): 7092–107. http://dx.doi.org/10.1039/c6ra25208g.

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Limiting activity coefficients for 64 solutes in [BzMIM][NTf2] and [BzMIM][DCA], the gas–liquid partition coefficients, KL, thermodynamic functions and selectivity for hexane/hex-1-ene, cyclohexane/cyclohexene and ethylbenzene/styrene separation were presented.
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2

Mohamad Azmi, Bustam-Khalil, Abdul Hannan Muhamad, Girma Gonfa, and Zakaria Man. "Benzene and Cyclohexane Separation Using 1-Propanenitrile-3-butylimidazolium Dicyanamide Ionic Liquid." Advanced Materials Research 879 (January 2014): 58–62. http://dx.doi.org/10.4028/www.scientific.net/amr.879.58.

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Cyclohexane is mainly produced by catalytic hydrogenation of benzene, and the separation of unreacted benzene is very important process. However, the separation of benzene and cyclohexane mixture is one of the difficult separation processes in petrochemical industry. Presently, extractive distillation is commercially used to separate benzene and cyclohexane using molecular solvents. However, the current process suffers from process complexity and high-energy consumption. In this work, new ionic liquid, 1-propanenitrile-3-butylimidazolium dicyanamide was synthesized and applied for separation benzene and cyclohexane mixture. Some of the thermophysical properties of the ionic liquid were measured. The vapour- liquid equilibrium and relative volatility of the components were determined. The ionic liquid breaks the azeotropic mixture and increased the relative volatility of cyclohexane to benzene.
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3

Hong, Yun, Yanxiong Fang, Dalei Sun, and Xiantai Zhou. "Ionic liquids modified cobalt/ZSM-5 as a highly efficient catalyst for enhancing the selectivity towards KA oil in the aerobic oxidation of cyclohexane." Open Chemistry 17, no. 1 (August 21, 2019): 639–46. http://dx.doi.org/10.1515/chem-2019-0068.

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AbstractThe industrial oxidation of cyclohexane is currently performed with very low conversion level, i.e. 4-6% conversion and poor selectivity for cyclohexanone and cyclohexanol (K-A oil), i.e.70-85%, at above 150oC reaction temperature and above 10atm reaction pressure using molecular oxygen oxidant and homogeneous catalyst. Several disadvantages are, however, associated with the process, such as, complex catalyst-product separation, high power input, and low safe operation. Therefore, the oxidation of cyclohexane using heterogeneous catalyst oxygen oxidant from air at mild conditions has received particular attention. Aerobic oxidation of cyclohexane over ionic liquids modified cobalt/ZSM-5 (IL-Co/ZSM-5) in absence of solvents was developed in this article. The prepared catalysts were characterized by XRD, FT-IR, N2 adsorption-desorption, SEM, TEM and XPS analyses. The influence of reaction parameters on the oxidation of cyclohexane was researched, such as the various catalysts, reaction temperature, reaction time, and the reaction pressure, on the process. Highly selective synthesis of KA oil was performed by aerobic oxidation of cyclohexane using ionic liquids modified cobalt/ZSM-5 (IL-Co/ZSM-5) as the catalyst in absence of solvents for the first time. A selectivity of up to 93.6% of KA oil with 9.2% conversion of cyclohexane was produced at 150℃ and 1.5 MPa after 3 h, with about 0.1 mol cyclohexane, C7mimHSO4-Co/ZSM-5 catalyst equal to 6.0 wt%, respectively. The induction period of oxidation was greatly shortened when the ionic liquid was supported on ZSM-5. The catalyst was easy to centrifuge and was reused after five cycles. It was found that both the characterization and performance of the catalysts revealed that both the presence of oxygen vacancies with incorporation of Co ions into the framework of ZSM-5 and the introduction of C7mimHSO4 into the ZSM-5 leads to the both satisfactory selectivity and robust stability of the C7mimHSO4-Co/ZSM-5 heterogeneous catalyst.
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Richard, Bradley, Mohammad Azmi Bustam, and Girma Gonfa. "Separation of Benzene and Cyclohexane with Mixed Solvent Using Extractive Distillation." Applied Mechanics and Materials 625 (September 2014): 578–81. http://dx.doi.org/10.4028/www.scientific.net/amm.625.578.

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Isothermal Vapour-liquid equilibrium for cyclohexane (1) + benzene (2) binary system, cyclohexane (1) + benzene (2) dimethylformamide (3) ternary system and cyclohexane (1) + benzene (2) dimethylformamide (3) + cosolvent (4) quaternary systems were obtained. The effects of cosolvents (diethyl glycol, dimethylsulfoxide, N-methylformamide) on the performance of dimethylformamide in benzene-cyclohexane separation were studied. The result shows the selected cosolvents suppress the effectiveness of dimethylformamide. The result also shows that the ratio of cosolvents to dimethylformamide affects the separation factor.
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Navarro, Pablo, Antonio Ovejero-Pérez, Miguel Ayuso, Noemí Delgado-Mellado, Marcos Larriba, Julián García, and Francisco Rodríguez. "Cyclohexane/cyclohexene separation by extractive distillation with cyano-based ionic liquids." Journal of Molecular Liquids 289 (September 2019): 111120. http://dx.doi.org/10.1016/j.molliq.2019.111120.

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Chen, Liangji, Hao Zhang, Yingxiang Ye, Zhen Yuan, Jiaqi Wang, Yisi Yang, Si Lin, Fahui Xiang, Shengchang Xiang, and Zhangjing Zhang. "Microporous polycarbazole frameworks with large conjugated π systems for cyclohexane separation from cyclohexane-containing mixtures." New Journal of Chemistry 45, no. 47 (2021): 22437–43. http://dx.doi.org/10.1039/d1nj04968b.

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Ding, Yanjun, Lukman O. Alimi, Basem Moosa, Carine Maaliki, Johan Jacquemin, Feihe Huang, and Niveen M. Khashab. "Selective adsorptive separation of cyclohexane over benzene using thienothiophene cages." Chemical Science 12, no. 14 (2021): 5315–18. http://dx.doi.org/10.1039/d1sc00440a.

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Hadj-Kali, Mohamed K., M. Zulhaziman M. Salleh, Irfan Wazeer, Ahmad Alhadid, and Sarwono Mulyono. "Separation of Benzene and Cyclohexane Using Eutectic Solvents with Aromatic Structure." Molecules 27, no. 13 (June 23, 2022): 4041. http://dx.doi.org/10.3390/molecules27134041.

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The separation of benzene and cyclohexane is a challenging process in the petrochemical industry, mainly because of their close boiling points. Extractive separation of the benzene-cyclohexane mixture has been shown to be feasible, but it is important to find solvents with good extractive performance. In this work, 23 eutectic solvents (ESs) containing aromatic components were screened using the predictive COSMO-RS and their respective performance was compared with other solvents. The screening results were validated with experimental work in which the liquid–liquid equilibria of the three preselected ESs were studied with benzene and cyclohexane at 298.5 K and 101.325 kPa, with benzene concentrations in the feed ranging from 10 to 60 wt%. The performance of the ESs studied was compared with organic solvents, ionic liquids, and other ESs reported in the literature. This work demonstrates the potential for improved extractive separation of the benzene-cyclohexane mixture by using ESs with aromatic moieties.
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Okushita, H. "Synthesis of polyoxyethylene grafting nylon 6 and the selective separation of cyclohexane/cyclohexanone/cyclohexanol mixture through its membranes." Journal of Membrane Science 112, no. 1 (April 3, 1996): 91–100. http://dx.doi.org/10.1016/0376-7388(95)00280-4.

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Shen, J. N., L. G. Wu, H. L. Chen, and C. J. Gao. "Separation cyclohexene/cyclohexane mixtures with facilitated transport membrane of poly(vinyl alcohol)–Co2+." Separation and Purification Technology 45, no. 2 (October 2005): 103–8. http://dx.doi.org/10.1016/j.seppur.2005.02.013.

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Dissertations / Theses on the topic "Cyclohexane Separation"

1

Yu, Chia-Chen, and 游嘉珍. "Separation of the benzene/cyclohexane mixture by a distillative crystallization technology." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/17069776889587692001.

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碩士
長庚大學
化工與材料工程研究所
95
A distillative crystallization technology, called distillative freezing (DF), is introduced to separate the benzene(Bz)/cyclohexane(Cx) mixture. Basically, DF is a distillative crystallization technology, which combines distillation and crystallization to produce pure crystals. A model is proposed to simulate the DF process in a series of N equilibrium stage operation, where each stage is operated under an adiabatic condition at a three phase equilibrium. To account for the nonideality of Bz/Cx liquid solution, the activity coefficients from the Wilson equation are incorporated to determine the three phase equilibrium conditions during the DF process. The experiments show that three DF operations are required to purify Cx (B) from to in the Cx-rich mixture. On the other hand, only one DF operation is required to purify Bz (A) mixture from to in the Bz-rich mixture. Thus, it is easier to separate Bz from the Bz-rich mixture than to separate Cx from the Cx-rich mixture. These experimental results are consistent with the DF simulations predicted by the proposed model.
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Yeh, Hsing-Hsian, and 葉興憲. "Feasibility Study for the Separation of n-Hexane and Cyclohexane by Supercritical Fluid Chromatography with Molecular Sieve 5A." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/76938089045520181571.

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碩士
義守大學
化學工程學系暨生物技術與化學工程研究所
104
This study uses supercritical fluid chromatography (SFC) to investigate the retention behavior of n-Hexane and cyclohexane on the molecular sieves. The isotherms and dispersion coefficients of the cyclohexane in the bed of molecular sieves are obtained by curve fitting from the spectrum of SFC. The studied pressures are 1000, 1500, and 2000 psi, the investigated temperatures are 40, 50, and 60 ℃, and the flow rate of carbon dioxide is 2.0 g/min. The experimental results showed that both the temperature and pressure can affect the isotherms, but the retention behaviors of n-hexane and cyclohexane on the molecular sieves have no significant difference. This study provides a fast and simple method to investigate the isotherms of organic compound on solids. In addition, the collected isotherms will also provide useful information for the future application of the separation of cyclohexane.
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Ulloa, Charlie Jose. "Remediation of Cellulose Acetate Gas Separation Membranes Contaminated by Heavy Hydrocarbons." Thesis, 2012. http://hdl.handle.net/10012/6598.

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Polymeric membranes have been essential to increasing the efficiency of membrane separation processes. The viability of membrane systems for industrial gas applications lies in the tolerance of such membranes to contamination. While membrane contamination from volatile species can be addressed using purge streams and heat treatment, contamination from non-volatile hydrocarbons can cause a significant decline in membrane permselectivity. This study was focused on the characterization and remediation of cellulose acetate (CA) hollow fibre membranes contaminated by heavy hydrocarbons. CA membranes have a moderate resistance against performance decline from hydrocarbons found in natural gas. Hollow fibre CA membranes were coated with motor oil lubricant to simulate heavy hydrocarbon contamination from large-scale gas compressors and industrial feed streams, and remediation of the CA fibres was conducted using solvent extraction methods. The permeabilities of the membranes to carbon dioxide, helium, hydrogen, methane, nitrogen and oxygen were measured at pressures 300 – 1500kPa and at temperatures 25° – 50°C. It was shown that even a thin layer of oil on the membrane surface can result in substantial losses in membrane performance, with faster permeating gases (e.g. He and H₂) suffering the worst losses. Solvent exchange, in which the membrane was washed using a series of solutions of varying organic content, was unable to remediate the membrane effectively, while the removal of the heavy hydrocarbons by a direct cyclohexane rinse was found to work well to restore the membrane performance.
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Lin, Yu-Shiuan, and 林育玄. "Selection of Mass Separation Agents for the Cyclohexanone/Cyclohexanol System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/86939200354326542258.

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碩士
東海大學
化學工程與材料工程學系
102
Cyclohexanone is an key intermediate in the production of caprolactam and adipic acid. It either comes from catalytic dehydrogenation of cyclohexanol or from oxidation of cyclohexane. Purification of cyclohexanone is an important step in these process. This study looks into the separation of a cyclohexanol/cyclohexanone mixture, which forms a close-boiling system. Addition of a third component, commonly termed mass separation agent (MSA), can often be used to increase the relative volatility and makes separation easier. This separation means has been investigated in this study. Initially, UNIFAC, UNIFAC-DMD, and COSMO-SAC models have been employed to screen potential MSAs. On the other hand, selectivities of chosen MSAs at infinite dilution were measured by headspace chromatography using a phase ratio variation method. Changes in relative volatility in the presence of the MSAs were also quantified. Diethylene glycol and dimethyl sulfoxide were the final chosen solvents for which ternary vapor-liquid equilibrium data were gathered and fitted with the NRTL model. Simulations and economic analysis have been carried out for extractive distillation processes using these two solvents. Our analysis reveals that diethylene glycol is the most economical solvent for the separation.
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LIU, ZU-HAO, and 劉祖澔. "Screening and Assessment of Mixed Solvents for the Cyclohexanone/Cyclohexanol Separation System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68249224326768672664.

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碩士
東海大學
化學工程與材料工程學系
104
Separation unit is usually the core element of a chemical process. Often to enhance the relative volatility of key components in a separation system in the presence of azeotropes or close boilers, addition of a mass separating agent (MSA) is required. Three thermodynamic models, namely UNIFAC ,UNIFAC-DMD, and COSMO-SAC, have been employed to estimate the selectivity of individual MSA candidate as a screening index. Possibility of synergistic effects for the separation of the cyclohexanol/cyclohexane system through the use of mixed solvents has been explored in the study. A mixed solvent system with DMSO and DG has shown to has such potential. Vapor-liquid equilibrium (VLE) measurements were conducted for the mixed solvent system to fill the VLE data gap. The data obtained were regressed by the NRTL model to yield binary interaction parameters, with which an extractive distillation (ED) system using the mixed solvent was simulated and optimized. Simulation results show that, in term of process economics, the optimal ED process is found when the DMSO/DG blending ratio is 1:3 or 1:1, which is even better than that of the single MSA (DG)-based ED process. With the addition of 30%wt of DMSO/DG mixed solvent (blending ratio 3:1),synergistic effect was also observed in batch distillation experiments, which also agreed well with the simulation results.
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Shie, chung yen, and 謝忠諺. "Selection of Mass separating Agent for the Cyclohexanone Process." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/24559659962655661705.

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碩士
東海大學
化學工程與材料工程學系
100
Because cyclohexanone/phenol mixture exhibits a binary azeotrope, a third component which is commonly referred to as mass separation agent (MSA) can be added to break the azeotrope and make separation of such a mixture possible via azeotropic distillation or extractive distillation. In this study, we focused on the selection of MSA. First, thermodynamic models were employed to help screen some twenty organic solvents as potential MSA candidates. Three best MSAs were selected, namely propanol, acetone, and butanone. In addition to the three organic solvents, two salts (NaH2PO4 and (NH4)2HPO4), two ionic solutions ([EMIM][PF6] and [BMIM][PF6]), and five other chemicals (TBP, TPP, DPP, TTP and cyclohexanol) covered in prior patents were further assessed and compared in terms of their MSA selectivities at infinite dilution, which were obtained by means of a variable-phase ratio method using headspace gas chromatography. Changes in relative volatility of cyclohexanone to phenol in the presence of these MSAs were also measured at the azeotropic composition. Based on MSA selectivities and changes in relative volatility, acetone and [EMIM][PF6] were screened out. Subsequent vapor-liquid equilibrium data for these two MSAs were measured and fitted with thermodynamic models. Separation systems using the two MSAs were simulated and compared against the one using sulfolane as an MSA. Results of economic analysis showed that acetone was the best MSA among the ones considered.
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Book chapters on the topic "Cyclohexane Separation"

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Uragami, Tadashi. "Benzene and Cyclohexane Separation." In Encyclopedia of Membranes, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_49-1.

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Nagy, E., J. Stelmaszek, and A. Ujhidy. "Separation of Benzene-Methanol and Benzene-Cyclohexane Mixtures by Pervaporation Process." In Membranes and Membrane Processes, 563–71. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2019-5_55.

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3

Cavalcante, Célio L., and Douglas M. Ruthven. "Separation of cyclohexane from 2,2 and 2,4 dimethyl pentanes by adsorption in silicalite." In Studies in Surface Science and Catalysis, 1209–16. Elsevier, 1994. http://dx.doi.org/10.1016/s0167-2991(08)63659-9.

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4

Zhang, Chunyong, and Jiehong Cheng. "Computer aided design of continuous extractive distillation processes for the separation of binary azeotrope: Cyclohexane-ethyl acetate with diethylene glycol." In Advances in Energy Equipment Science and Engineering, 1989–92. CRC Press, 2015. http://dx.doi.org/10.1201/b19126-385.

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Conference papers on the topic "Cyclohexane Separation"

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Gonfa, Girma, Marhaina Ismail, and Mohamad Azmi Bustam. "Benzene and cyclohexane separation using 1-butyl-3-methylimidazolium thiocyanate." In INTERNATIONAL CONFERENCE “FUNCTIONAL ANALYSIS IN INTERDISCIPLINARY APPLICATIONS” (FAIA2017). Author(s), 2017. http://dx.doi.org/10.1063/1.4999855.

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ZHU, MINGQIAO, CHAOHONG HE, TINGHUA WU, YAN GUAN, FULIN MAO, and YANER ZHOU. "SIMULATION FOR SEPARATION OF CYCLOHEXANE AND BENZENE BY EXTRACTIVE DISTILLATION." In Proceedings of the 4th International Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702623_0052.

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Bokova, Elena S., Yylia S. Romanova, Maria A. Smulskay, and Ivan Y. Filatof. "Development and production of non-woven separation materials for alkaline batteries." In INTERNATIONAL SCIENTIFIC-TECHNICAL SYMPOSIUM (ISTS) «IMPROVING ENERGY AND RESOURCE-EFFICIENT AND ENVIRONMENTAL SAFETY OF PROCESSES AND DEVICES IN CHEMICAL AND RELATED INDUSTRIES». The Kosygin State University of Russia, 2021. http://dx.doi.org/10.37816/eeste-2021-2-183-188.

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The study examined separazione non-woven material obtained by the method of electrohidrodinamica hamowania from solutions of polysulfone in various solvents. The influence of the concentration and dynamic viscosity of spinning solutions on the electroforming process and the fiber diameter of non-woven materials is shown. The concentration dependences and ranges of changes in the dynamic viscosity that determine the nature of spinning and its transition from the process of electrospray liquid (ERW) to the actual process of electroforming fibers (EFV) are established. The possibility of predicting the fiber diameter and pore size of a nonwoven material is shown. It is established that the preferred solvents for the preparation of separation materials from polysulfone are dichloroethane, cyclohexanone and their mixtures.
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