SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 33 ›› Issue (5): 76-82.DOI: 10.1016/j.cjche.2020.07.024

• Separation Science and Engineering • Previous Articles     Next Articles

The phase behavior of n-ethylpyridinium tetrafluoroborate and sodium-based salts ATPS and its application in 2-chlorophenol extraction

Shuai Xu1,2, Qi Zhu2, Shaojie Xu1,3, Manjing Yuan1,3, Xuliang Lin1,3, Wenjing Lin1, Yanlin Qin1,3, Yuliang Li2   

  1. 1 School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
    2 Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710064, China;
    3 Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2020-03-12 Revised:2020-07-01 Online:2021-08-19 Published:2021-05-28
  • Contact: Yanlin Qin, Yuliang Li
  • Supported by:
    This work was sponsored by the Natural Science Foundation for Distinguished Young Scholars of Guangdong Provence (2019B151502038), the National Natural Science Foundation of China (21706038, 21808042, 21808039), the Fundamental Research Funds for the Central Universities (300102299202), and the National Training Projects of the University Students' Innovation and Entrepreneurship program (201910710125), the Scientific Innovation Practice Project of Postgraduates of Chang'an University (300103703058, 300103703016).

The phase behavior of n-ethylpyridinium tetrafluoroborate and sodium-based salts ATPS and its application in 2-chlorophenol extraction

Shuai Xu1,2, Qi Zhu2, Shaojie Xu1,3, Manjing Yuan1,3, Xuliang Lin1,3, Wenjing Lin1, Yanlin Qin1,3, Yuliang Li2   

  1. 1 School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
    2 Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710064, China;
    3 Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong University of Technology, Guangzhou 510006, China
  • 通讯作者: Yanlin Qin, Yuliang Li
  • 基金资助:
    This work was sponsored by the Natural Science Foundation for Distinguished Young Scholars of Guangdong Provence (2019B151502038), the National Natural Science Foundation of China (21706038, 21808042, 21808039), the Fundamental Research Funds for the Central Universities (300102299202), and the National Training Projects of the University Students' Innovation and Entrepreneurship program (201910710125), the Scientific Innovation Practice Project of Postgraduates of Chang'an University (300103703058, 300103703016).

Abstract: In this paper, the aqueous two-phase systems (ATPS) containing n-ethylpyridinium tetrafluoroborate ([EPy]BF4), sodium-based salts, and water were studied and the extraction efficiency of 2-chlorophenol was measured to study the ATPS performance in extracting phenolic compounds. The binodal curves of [EPy]BF4 + sodium carbonate (Na2CO3) ATPS and [EPy]BF4 + sodium dihydrogen phosphate (NaH2PO4) ATPS have been determined at 308.15 K, 318.15 K, and 328.15 K and atmospheric pressure. After getting good correlation with Merchuk equation, the binodal curves together with gravimetric method were used to calculate the tie-lines data. Furthermore, the reliability of tie-lines data was verified using Othmer-Tobias and Bancroft equations. Then, the salt influence and temperature influence on the phase behavior were discussed and the results show the salt-outing ability of Na2CO3 is better than NaH2PO4. With the aim of studying the ATPS performance in extracting phenolic compounds, extraction efficiency for 2-chlorophenol at different temperatures were studied and the results show that [EPy]BF4 + Na2CO3 ATPS is preferred than [EPy]BF4 + NaH2PO4 ATPS in applications.

Key words: Ionic liquid, Aqueous two-phase systems, 2-chlorophenol, HPLC, Extraction

摘要: In this paper, the aqueous two-phase systems (ATPS) containing n-ethylpyridinium tetrafluoroborate ([EPy]BF4), sodium-based salts, and water were studied and the extraction efficiency of 2-chlorophenol was measured to study the ATPS performance in extracting phenolic compounds. The binodal curves of [EPy]BF4 + sodium carbonate (Na2CO3) ATPS and [EPy]BF4 + sodium dihydrogen phosphate (NaH2PO4) ATPS have been determined at 308.15 K, 318.15 K, and 328.15 K and atmospheric pressure. After getting good correlation with Merchuk equation, the binodal curves together with gravimetric method were used to calculate the tie-lines data. Furthermore, the reliability of tie-lines data was verified using Othmer-Tobias and Bancroft equations. Then, the salt influence and temperature influence on the phase behavior were discussed and the results show the salt-outing ability of Na2CO3 is better than NaH2PO4. With the aim of studying the ATPS performance in extracting phenolic compounds, extraction efficiency for 2-chlorophenol at different temperatures were studied and the results show that [EPy]BF4 + Na2CO3 ATPS is preferred than [EPy]BF4 + NaH2PO4 ATPS in applications.

关键词: Ionic liquid, Aqueous two-phase systems, 2-chlorophenol, HPLC, Extraction