项目名称： 离子液体参与构筑的新型液相体系萃取贵金属的机理研究

项目编号： No.21476129

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 杨延钊

作者单位： 山东大学

项目金额： 89万元

中文摘要： 离子液体用于贵金属萃取是当前离子液体研究及金属萃取的共同热点，离子液体参与构筑的体系在贵金属萃取方面展现出不同于传统溶剂萃取的优异表现。本项目拟设计、合成一系列基于贵金属萃取的新型类离子液体硫酮、硒酮萃取剂，利用分子模拟设计的手段，将合成的萃取剂与离子液体、助剂构筑为萃取性能稳定、萃取过程无乳化及第三相形成的硫酮、硒酮/疏水离子液体和离子液体新型自组装萃取体系；研究两类液相体系对金、钯等贵金属的萃取行为，结合单晶培养和界面性质研究，确立萃取机理，建立传质模型；跟踪萃取过程中萃取体系的微观结构变化，研究其微观结构与萃取性能的构效关系；研究贵金属反萃及离子液体循环利用的机理。通过本项目的研究可丰富和发展离子液体用于贵金属萃取的基础理论，并有望解决离子液体再生利用等实际问题。

中文关键词： 离子液体；萃取；贵金属；反萃

英文摘要： The extraction systems containing ionic liquids (ILs) exhibit special advantages in the noble metals extraction over conventional extraction process, making it to be the focus of ionic liquids and metal extraction studies. We intend to design and synthesize a series of novel ILs-based thione and selone extractants for the noble metals extraction. By means of molecular simulation,the synthesized extractants will participate together with hydrophobic ionic liquids and auxiliaries in the thione (selone)/ hydrophobic ILs and the ILs-based self-assembly extraction systems, which have stable structure and will not emulsify during the extraction process. Then, the extraction behavior of noble metals including gold and palladium will be investigated. The extraction mechanism and the masstransfer mechanism will be confirmed by the monocrystals analysis and the study of interfacial properties respectively. The further research will concern the effect of microstructural variation on extraction yield during extraction process, the back-extraction of metal ions and the recycle of ILs. Based upon this research, basic theories of noble-metal extraction with ILs could be developed, some practical problems like ILs recycling are hoped to be resolved.

英文关键词： ionic liquids;extraction;noble metals;stripping