Highly efficient separation of benzene + cyclohexane mixtures by extraction combined extractive distillation using imidazolium-based dicationic ionic liquids

Zhang, Wanxiang; Zhao, Wuji; Ren, Shuhang; Hou, Yucui; Wu, Weize

doi:10.1016/j.gce.2022.07.003

Cited by 11 publications

(5 citation statements)

References 46 publications

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“…6 In contrast to extractive distillation, the energy consumption of liquid–liquid extraction can be relatively low, but extra purification processes are further involved. 7–9 An alternative approach for separation harnessing molecular interaction differences during physical adsorption in porous solids offers significant advantages including low energy consumption. 10 The separation efficiency of such a physically adsorptive approach can be highly improved by controlling the pore structures of adsorbent materials.…”

Section: Introductionmentioning

confidence: 99%

Fast adsorption and kinetic separation of benzene and cyclohexane/cyclohexene in a microporous metal azolate framework

Qiu,

Li,

et al. 2024

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Fast adsorption and kinetic separation of benzene and cyclohexane/cyclohexene in a microporous metal azolate framework

Qiu,

Li,

et al. 2024

J. Mater. Chem. A

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“…18 The COSMO-based model can be quickly applied to evaluate the separation performance of ILs and their analogues without relying on experimental data. 19,20 For example, Zhang et al 21,22 performance indicators at practical feed composition are more guiding for the screening of extractants. 24 Moreover, the melting point and viscosity of extractants should be fully considered in the screening process to minimize mass transfer energy consumption as much as possible.…”

Section: Introductionmentioning

confidence: 99%

“…The COSMO-based model can be quickly applied to evaluate the separation performance of ILs and their analogues without relying on experimental data. , For example, Zhang et al , used the COSMO-based model to investigate the extraction performance of ILs and deep eutectic solvents (DESs) for separating benzene and cyclohexane. Our group employed the COSMO-RS model to screen 70 pyridinium-based ILs for separating m -cresol and cumene through infinite dilution indicators .…”

Section: Introductionmentioning

confidence: 99%

Extractive Mechanism and Process Design of Hydroxyl-Functionalized Pyridinium-Based Ionic Liquids for Separating m-Cresol and Cumene

Liu,

Zhang,

2023

ACS Sustainable Chem. Eng.

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In this work, we adopt hydroxyl-functionalized pyridinium-based ionic liquids (ILs) as extractants for separating m-cresol and cumene with higher product purity and lower energy consumption. First, a systematic approach combining thermodynamic property calculation and physical property estimation was employed to screen suitable ILs. Second, the extraction conditions, including stirring time, temperature, and IL dosage were optimized to obtain good separation performance of the identified ILs. The recycling performance of identified ILs were further explored. Then, the combination of quantum chemical calculation, wave function analysis, and FT-IR characterization was applied to explore the separation mechanism. Finally, Aspen Plus software was applied to simulate the extraction process of the optimal IL. The results indicate that two pyridinium-based ILs ([HO-C 3 py][SCN] and [HO-C 3 py][N(CN) 2 ]) are identified because of their high separation performance and suitable physical property. The m-cresol extraction efficiencies of [HO-C 3 py][SCN] and [HO-C 3 py][N(CN) 2 ] at optimized extraction conditions are 98.02 and 98.03%, and their cumene entrainments are 11.33 and 14.37%, respectively. Hydrogen bonding interaction with covalent character between pyridinium-based IL and m-cresol is the key driving force in the separation process. The process simulation results show that [HO-C 3 py][SCN] is a promising IL in industrial applications.

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“…12 Coupling LLE and distillation processes can maximize the advantages of low energy consumption of LLE and high separation efficiency of distillation. 13,14 In this work, a highly selective and dis- In this work, the COSMO-SAC model was used to predict the separation performance of QASs and ILs for IND, and candidate extractants were determined. The experimental conditions, IL water content, and the recovery and reuse performance of ILs were verified and explored.…”

Section: Introductionmentioning

confidence: 99%

“…The π–π conjugation between IND and other nitrogen‐containing compounds in wash oil leads to low purity of IND products, which is the main problem that makes it difficult to achieve industrial application 12 . Coupling LLE and distillation processes can maximize the advantages of low energy consumption of LLE and high separation efficiency of distillation 13,14 . In this work, a highly selective and distributive tetraethylammonium‐based IL was used to separate IND.…”

Section: Introductionmentioning

confidence: 99%

Experimental and molecular insights on the separation of indole from wash oil by tetraethylammonium‐based ionic liquids

Zhang,

Lv,

Zhang

et al. 2023

AIChE Journal

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A method for separating indole (IND) from wash oil by tetraethylammonium‐based ionic liquid (IL) was proposed. The distribution coefficient and selectivity of 304 kinds of ILs to IND were predicted by using Conductor‐like Screening Model for the Segment Activity Coefficient model, and quaternary ammonium acetate ILs have excellent separation performance. The experimental conditions were validated, and the influence of these conditions was explored. The IL could be recycled with water, and its structure and performance remained unchanged after repeated use four times. The extraction efficiency for real wash oil provided by a company reached 91.6%. The structure–performance relationship was explored by using quantum chemistry and molecular dynamic simulation. A process combining liquid–liquid extraction and azeotropic distillation was established for the separation of IND mixtures, and an IND product with a purity of 99.9% was obtained. This work comprehensively analyzed the separation of IND from wash oil using ILs at an atomic‐molecular‐experimental‐process scale.

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Highly efficient separation of benzene + cyclohexane mixtures by extraction combined extractive distillation using imidazolium-based dicationic ionic liquids

Cited by 11 publications

References 46 publications

Fast adsorption and kinetic separation of benzene and cyclohexane/cyclohexene in a microporous metal azolate framework

Fast adsorption and kinetic separation of benzene and cyclohexane/cyclohexene in a microporous metal azolate framework

Extractive Mechanism and Process Design of Hydroxyl-Functionalized Pyridinium-Based Ionic Liquids for Separating m-Cresol and Cumene

Experimental and molecular insights on the separation of indole from wash oil by tetraethylammonium‐based ionic liquids

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