Abstract: ChCl/C6H8O7 deep eutectic solvent(DES) was synthesized by choline (ChCl) as hydrogen bond acceptor and citric acid (C6H8O7) as hydrogen bond donor. Meanwhile, twenty percent of water was added into ChCl/C6H8O7 to reduce the viscosity. The structure was characterized and analysed by FI⁃IR and 1H⁃NMR. The denitrification of basic nitrogen in simulated oil was studied by using ChCl/C6H8O7 DES as extractant. The results show that the removal rate of quinoline in the simulated oil can attach to 95.64%, when the mass ratio of solvent to oil is 1∶5, the extraction time is 35 min, and the extraction temperature is 20 ℃. At the same time, taking toluene and cyclohexene as examples, the effects of aromatic hydrocarbons and olefins on the denitrification of DES are investigated. The mechanism of denitrification of DES is determined by infrared spectroscopy

Key words: Deep eutectic solvent, Extraction, Quinolone, Rate of denitrogenation, Characterization analysis

摘要： 以氯化胆碱(ChCl)为氢键受体，以柠檬酸(C6H8O7)为氢键供体，经过低温搅拌合成ChCl/C6H8O7型低共熔溶剂，同时加入占总质量20%的水来降低其黏度。通过红外光谱和核磁共振氢谱对其结构进行表征分析。以ChCl/C6H8O7型低共熔溶剂为萃取剂，对模拟油中的碱性氮进行了脱氮研究。结果表明，在剂油质量比为1∶5、萃取时间为35 min、萃取温度为20 ℃的条件下，模拟油中喹啉的脱除率为95.64%。同时，以甲苯和环己烯为例，考察了芳香烃和烯烃对该低共熔溶剂脱氮的影响。通过红外光谱分析，确定了低共熔溶剂的脱氮机理

关键词: 低共熔溶剂, 萃取, 喹啉, 脱氮率, 表征分析