Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction

doi:10.1016/j.cjche.2021.01.008

中国化学工程学报 ›› 2021, Vol. 35 ›› Issue (7): 180-188.DOI: 10.1016/j.cjche.2021.01.008

• Separation Science and Engineering • 上一篇下一篇

Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction

Yonglin Li¹, He'an Luo^1,2, Qiuhong Ai^1,2, Kuiyi You^1,2, Fei Zhao¹, Wenlong Xiao¹

1. School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;
2. National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, China

收稿日期:2020-09-15 修回日期:2021-01-19 出版日期:2021-07-28 发布日期:2021-09-30
通讯作者: He'an Luo, Qiuhong Ai
基金资助:
We are grateful for the financial support by the National Natural Science Foundation of China (21676226, 21606186), the Natural Science Foundation for Distinguished Young Scholars in Hunan Province (2018JJ1023), Key Research and Development Program in Hunan Province (2019GK2041), and Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization.

Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction

Yonglin Li¹, He'an Luo^1,2, Qiuhong Ai^1,2, Kuiyi You^1,2, Fei Zhao¹, Wenlong Xiao¹

1. School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;
2. National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, China

Received:2020-09-15 Revised:2021-01-19 Online:2021-07-28 Published:2021-09-30
Contact: He'an Luo, Qiuhong Ai
Supported by:
We are grateful for the financial support by the National Natural Science Foundation of China (21676226, 21606186), the Natural Science Foundation for Distinguished Young Scholars in Hunan Province (2018JJ1023), Key Research and Development Program in Hunan Province (2019GK2041), and Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization.

摘要/Abstract

摘要： In this paper, a method of extracting phenols from coal tar by amines aqueous solution was proposed. The effects of various amines on the extraction properties of phenols in coal tar were researched from the views of molecular structure. The parameters such as molar ratio, concentration, extraction time and temperature for the extraction of coal tar by the monoethanolamine and ethylenediamine aqueous solution were examined. The results show that the organic amine with more amino groups, hydroxyl structure and strong electronegativity exhibited better extraction performance. Under the optimal conditions, the extraction yields of phenols in coal tar by the monoethanolamine or ethylenediamine aqueous solution are above 80%, and the recovery yields of amines reach 99%. Furthermore, the probable geometries of complexes formed by the combination of phenols and organic amines were calculated by density function theory. In addition, several thermodynamic models were evaluated through comparing the relative deviation of simulation results by ASPEN PLUS to the experimental ones, which provide feasibility thermodynamic models for the simulation of extraction process. The present work affords a mild, efficient and green approach for the extraction of phenols from coal tar by an aqueous solution of amines in industry application.

关键词: Amines, Coal tar, Liquid-liquid equilibrium, Thermodynamic model

Abstract: In this paper, a method of extracting phenols from coal tar by amines aqueous solution was proposed. The effects of various amines on the extraction properties of phenols in coal tar were researched from the views of molecular structure. The parameters such as molar ratio, concentration, extraction time and temperature for the extraction of coal tar by the monoethanolamine and ethylenediamine aqueous solution were examined. The results show that the organic amine with more amino groups, hydroxyl structure and strong electronegativity exhibited better extraction performance. Under the optimal conditions, the extraction yields of phenols in coal tar by the monoethanolamine or ethylenediamine aqueous solution are above 80%, and the recovery yields of amines reach 99%. Furthermore, the probable geometries of complexes formed by the combination of phenols and organic amines were calculated by density function theory. In addition, several thermodynamic models were evaluated through comparing the relative deviation of simulation results by ASPEN PLUS to the experimental ones, which provide feasibility thermodynamic models for the simulation of extraction process. The present work affords a mild, efficient and green approach for the extraction of phenols from coal tar by an aqueous solution of amines in industry application.

Key words: Amines, Coal tar, Liquid-liquid equilibrium, Thermodynamic model

Yonglin Li, He'an Luo, Qiuhong Ai, Kuiyi You, Fei Zhao, Wenlong Xiao. Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction[J]. 中国化学工程学报, 2021, 35(7): 180-188.

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Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction

Efficient separation of phenols from coal tar with aqueous solution of amines by liquid-liquid extraction

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