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

作　　者：Shuai Xu Qi Zhu Shaojie Xu Manjing Yuan Xuliang Lin Wenjing Lin Yanlin Qin Yuliang Li 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2021年第5期76-82,共7页中国化学工程学报（英文版）

基　　金：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);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)

摘　　要：In this paper,the aqueous two-phase systems(ATPS)containing n-ethylpyridinium tetrafluoroborate([EPy]BF_(4)),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]BF_(4)+sodium carbonate(Na_(2)CO_(3))ATPS and[EPy]BF_(4)+sodium dihydrogen phosphate(NaH_(2)PO_(4))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 Na_(2)CO_(3) is better than NaH_(2)PO_(4).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]BF_(4)+Na_(2)CO_(3) ATPS is preferred than[EPy]BF_(4)+NaH_(2)PO_(4) ATPS in applications.

关 键 词：IONIC liquid Aqueous two-phase systems 2-CHLOROPHENOL HPLC EXTRACTION 

分 类 号：TQ028.32[化学工程]