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| 1 | Selective separation of protein and saccharides by ionic liquids aqueous two-phase systems显示文摘In the present work,it was found that aqueous solution of a hydrophilic ionic liquid (IL),1-butyl-3-methylimidazolium dicyanamide ([C4mim][N(CN)2]),could be separated into an aqueous two-phase system (ATPS) by inorganic salts such as K2HPO4 and K3PO4.The top phase is IL-rich,while the bottom phase is phosphate-rich.It was shown that 82.7%-100% bovine serum albumin (BSA) could be enriched into the top phase and almost quantitative saccharides (arabinose,glucose,sucrose,raffinose or dextran) were preferentially extracted into the bottom phase in a single-step extraction by [C4mim][N(CN)2] + K2HPO4 ATPS.The extraction efficiency of BSA from the aqueous saccharide solutions was influenced by the molecular structure of saccharides.The conductivity,dynamic light scattering (DLS) and transmission electron microscopy (TEM) were combined to investigate the microstructure of the IL-rich top phase and the possible mechanism for the selective separation.It is suggested that the formation of the IL aggregate and the IL aggregate-BSA complex plays a significant role in the separation of BSA from aqueous saccharide solutions.This is the first example for the selective separation by ILs-based ATPSs.It is expected that these findings would have potential applications in bio-analysis,separation,and IL recycle. | PEI YuanChao LI ZhiYong LIU Li WANG JianJi WANG HuiYong | 2010 | Science China Chemistry2010，53，7： | 12 |
| 2 | Anionic structural effect in liquid–liquid separation of phenol from model oil by choline carboxylate ionic liquids显示文摘Phenolic compounds exist in crude oil as pollutants, and their removal is vital important for the refining and further application of oils. In traditional separation approaches, strong acid and strong base have to be used to remove these compounds, which may cause serious environmental problems. In this work, 19 kinds of cholinium ionic liquids have been developed to separate phenol from model oil by liquid–liquid extraction. Structural effect of anions of the ionic liquids in the separation is systematically investigated. It is found that depending on the chemical structure of ionic liquids, phenol can be removed from toluene with single-step removal efficiency from 86 to 99% under optimal conditions. The type of substituent groups and the-CH_2 number between two carboxylates have obvious effect on the removal efficiency, and more hydrophilic ionic liquids have a stronger extraction performance for phenol. Furthermore, thermodynamic,^(13) C NMR,~1 H NMR and density functional theory calculations have been performed to characterize the extraction process and to understand the extraction mechanism. It is shown that the extraction of phenol from oil to ionic liquid is a favorable process, and this process is mainly driven by enthalpy change. The formation of the hydrogen bond between anion of the ionic liquid and-OH of phenol is the main driving force for the extraction of phenol from oil to the ionic liquids. | Zhiyong Li Ruipeng Li Xiaoqing Yuan Yuanchao Pei Yuling Zhao Huiyong Wang Jianji Wang | 2019 | Green Energy & Environment2019，4，2： | 4 |
| 3 | Ionic liquid-based aqueous two-phase extraction of selected proteins显示文摘 | Yuanchao Pei Jianji Wang Kun Wu Xiaopeng Xuan Xinjie Lu | 2008 | Separation and Purification Technology2008，，： | 1 |
| 4 | Design of environmentally friendly ionic liquid aqueous two-phase systems for the efficient and high activity extraction of proteins显示文摘 | Zhiyong Li Xinxin Liu Yuanchao Pei | 2012 | Green Chem2012，14，： | 1 |
| 5 | Recovery of amino acids by imidazolium based ionic liquids from a- queous media显示文摘 | Wang Jianji Pei Yuanchao Zhao Yang | 2005 | Green Chemistry2005，，4： | 1 |
| 6 | Ionic liquid-basedaqueous two-phase systems and their applications in green separationprocesses显示文摘 | LI Zhilong’ PEI Yuanchao WANG Huilong | 2010 | Trends in Analytical Chemistry2010，29，11： | 1 |
| 7 | Tunable LCST-type phase behavior of [FeCl4]--based ionic liquids in water显示文摘In this work, 16 kinds of [FeCl_4]^--based magnetic ionic liquids(ILs) with different cation structures have been designed and synthesized, and their structures are characterized by IR and Raman spectroscopy. Then the lower critical solution temperature(LCST)-type phase behavior of these magnetic ILs in water is investigated as a function of concentration. It is shown that cation structure, alkyl chain length and molar ratio of FeCl_3/chloride IL have a significant influence on the LCST of the mixtures. The phase separation temperature can be tuned efficiently by these factors. Meanwhile, the LCST-type phase separation process is also investigated by dynamic light scattering. The results support the mechanism that the hydrogen bonds of the [FeCl_4]^- anion with water have been gradually disrupted to form ILs aggregates with increasing temperature. In addition, the stability of the ILs in water is also examined in some details. These LCST-type phase separation systems may have potential applications in extraction and separation techniques at room temperature. | Yuanchao Pei Yuan Cao Yanjie Huang Xinxin Song Huiyong Wang Yuling Zhao Jianji Wang | 2016 | Science China Chemistry2016，59，5： | 0 |
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