研究离子液体的分离与回收对于减少离子液体对环境的影响、提高离子液体的利用效率、降低离子液体的应用成本、促进离子液体的工业应用具有重要的意义.本文重点综述了利用无机盐-离子液体双水相、糖-离子液体双水相、聚合物-离子液体双水相和CO2诱导的离子液体双水相技术分离回收离子液体的研究进展,分析了影响离子液体分离回收的关键因素,评价了不同离子液体双水相体系的优缺点,展望了该领域的发展方向及面临的挑战. It is of great significance to study the separation and recovery of ionic liquids in order to reduce the impact of ionic liquids on the environment, improve the utilization efficiency of ionic liquids, reduce the application cost of ionic liquids and promote the industrial application of ionic liquids.In this paper, The research progress of separation and recovery of ionic liquid by aqueous two-phase, two-phase of sugar-ionic liquid, two-phase of polymer-ionic liquid and CO2-induced ionic liquid was studied. The key factors influencing the separation and recovery of ionic liquid were analyzed. The advantages and disadvantages of different ionic liquids aqueous two-phase systems were evaluated, and the development direction and challenges in the field were prospected.