The extraction of aromatics using <i>N</i>-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration

Yanjing Li; Shilong Dong; Lili Wang; Xiaoyan Sun; Wenying Zhao; Shuguang Xiang

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The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration

Full Length Article | Updated：2026-01-06

- The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration
- The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration
- 中国化学工程学报（英文版） 2023年64卷第12期页码：117-127
- Affiliations：
  
  1. College of Chemical Engineering, Qingdao University of Science and Technology,Qingdao,China,266042
  2. College of Chemistry and Chemical Engineering, Qilu Normal University,Jinan,China,250200
- Author bio：
- Funds：
- DOI：
  中图分类号：
- 纸质出版：2023
- Accepted：
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Yanjing Li, Shilong Dong, Lili Wang, 等. The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration[J]. 中国化学工程学报（英文版）, 2023,64(12):117-127.

-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration[J]. 中国化学工程学报, 2023, 64(12): 117-127.
Yanjing Li, Shilong Dong, Lili Wang, 等. The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration[J]. 中国化学工程学报（英文版）, 2023,64(12):117-127. DOI：

-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration[J]. 中国化学工程学报, 2023, 64(12): 117-127. DOI：

摘要

Abstract

LLE data of cyclooctane/3-methylpentane + benzene/toluene +

-methylpyrrolidone (NMP) at 298.15 K and 313.15 K under a pressure of 101.3 kPa were measured in this work. The Othmer-Tobias and Hand equations were adopted to validate the reliability of LLE data

where the correlation coefficients (

) were close to unity

indicating the high reliability of the experimental data. The experimental data were analyzed using the distribution coefficient (

) and separation factor (

)

and the effect of NMP extracting benzene and toluene from aromatics was explored. Meanwhile

the reason for the different extraction efficiencies of benzene and toluene using NMP was analyzed by quantum chemical calculations. The NRTL and UNIQUAC thermodynamic models were used to correlate the liquid–liquid equilibrium data

and the relevant binary interaction parameters were obtained. The calculated root mean square deviation (RMSD) were all less than 0.0063

indicating that the obtained binary interaction parameters can be used to simulate and calculate the extraction of aromatics using NMP.

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The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration

The extraction of aromatics using N-methylpyrrolidone: Liquid-liquid equilibrium determination and mechanism exploration

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摘要

Abstract

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