Ionic liquids have been proven efficient and environmental medium for producing platform chemical levulinic acid. Lack of high-efficiency, stable and low-cost recovery strategy with complex electrolyte form restricts the further scale-up of ionic liquids for platform chemicals production. Membrane-based techniques including ultrafiltration (UF) and bipolar membrane electrodialysis (BMED) were employed for the high-efficiency recovery, regeneration and recycling of 1-ethyl-3-methylimidazolium hydrogen sulfate [Emim][HSO₄] for levulinic acid production from sugarcane bagasse. UF-BMED treatment works based on the interception of macromolecule biomass degradation products by UF treatment with regional recovery of Emim⁺ and SO₄^2- by BMED treatment. Effect of major parameters on [Emim][HSO₄] recovery performance was determined. Recovery ratio for Emim⁺ and SO₄^2- approached 95.4% and 95.9%. Energy consumption of specific [Emim][HSO₄] recovery was closed to 5.8 kWh/kg. Insight gained from this study suggests a high-efficiency and economical strategy for platform chemicals production with green solvent ionic liquids.

离子液体已被证明是生产平台化学乙酰丙酸的高效和环境介质。缺乏具有复杂电解质形式的高效，稳定和低成本的回收策略，限制了用于平台化学品生产的离子液体的进一步规模化。采用包括超滤（UF）和双极膜电渗析（BMED）的膜技术，对1-乙基-3-甲基咪唑硫酸氢盐[Emim] [HSO ₄ ]进行高效回收，再生和再循环，从而生产乙酰丙酸。甘蔗渣。UF-BMED处理工作基于通过UF处理截获大分子生物质降解产物并实现Emim ⁺和SO ₄ ^2-的区域回收通过BMED治疗。确定了主要参数对[Emim] [HSO ₄ ]回收性能的影响。Emim ⁺和SO ₄ ^2-的回收率分别达到95.4％和95.9％。特定[Emim] [HSO ₄ ]回收的能耗降至5.8 kWh / kg。从这项研究中获得的见识表明，使用绿色溶剂离子液体生产平台化学品的高效且经济的策略。