利用N，N-二甲基乙醇胺、溴代咪唑制备了一种新型高效率、低成本的醇胺离子液体（ILs）燃料油萃取脱硫剂；将其与具备不同磁性金属中心的氯化物反应生成新型醇胺磁性离子液体（MILs），并用于模拟油中的二苯并噻吩（DBT）深度萃取脱硫。探究了油剂体积比、萃取时间、萃取温度等不同工艺条件下，醇胺磁性离子液体对DBT的脱除效率，得出最佳脱硫工艺条件，并分析醇胺MILs的脱硫机理。结果表明，油剂体积比为6：5、最佳萃取时间为40 min、萃取温度控制在50℃时，脱硫率达到93%。机理研究表明，醇胺磁性离子中Fe³⁺与DBT形成较为稳定的配位复合物，具有较好的脱硫效果。

In order to develop a low-cost and high-efficiency fuel oil desulfurization agent, alkanolamine ionic liquids (ILs) are prepared from N, N-dimethyl ethanolamine and bromoimidazole.Alkanolamine magnetic ionic liquids (MILs) are obtained through reaction between the prepared ILs and chlorides with different magnetic metal centers.The obtained MILs are used to remove deeply dibenzothiophene (DBT) in simulated oil.DBT removal efficiencies are studied under different process conditions such as the ratio of oil to agent, extraction time, extraction temperature, the best desulfurization process conditions are determined and the desulfurization mechanism is analyzed.The results show that the desulfurization rate reaches 93% when the optimum extraction time is 40 min, the volume ratio of oil to agent is 6:5, and extraction temperature is controlled at 50℃.It is shown that a stable coordination complex can be formed between Fe³⁺ in MILs and DBT, contributing to a good desulfurization effect.

姚培(1981-),女,博士研究生,副教授,主要从事绿色化工生产技术相关的研究,641572575@qq.com