面向盐湖提锂的功能化疏水离子液体的设计及萃取性能研究

项目名称： 面向盐湖提锂的功能化疏水离子液体的设计及萃取性能研究

项目编号： No.21506042

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 有机化学

项目作者： 赵旭

作者单位： 自然资源部天津海水淡化与综合利用研究所

项目金额： 20万元

中文摘要： 溶剂萃取法是有前景、易工业化应用的盐湖提锂技术之一，但萃取剂存在流失、具有腐蚀性等问题。离子液体是一类新型绿色溶剂，有很高的内聚能，容易和其它溶剂组成低互溶度的液一液两相体系避免流失，特别是离子液体的结构和性质具有可设计性，可以通过搭配不同种类的阴阳离子或者引入不同的功能基团，从而与溶质进行多种相互作用，为液—液萃取体系的研究发展提供了新的平台。本项目拟设计开发对锂有萃取能力的功能化疏水离子液体，并阐明离子液体与锂的相互作用机理，建立以功能化疏水离子液体为萃取剂的盐湖提锂新方法。

中文关键词： 功能化疏水离子液体；液—液萃取；高镁锂比卤水；量子化学计算；COSMO-RS预测

英文摘要： The solvent extraction is promising and suitable for industrial application to extract lithium from salt lake. However, it still faces many problems and challenges, such as extractant loss, corrosive to the equipments, ect. Ionic liquids (ILs) are a new kind of green solvents for their nearly nonvolatility and offer an opportunity for addressing the challenges by developing novel extractants with their unique properties. The high cohesive energy makes ILs easy to form a liquid-liquid biphasic system with low mutual solubility. In particular, ILs can be expected to have diversified interaction with solute and provide a new platform for liquid-liquid extaction study by choosing different cations, anions and functional groups. Therefore, this study is proposed to illuminate the interaction mechanisms between ILs and lithium, and develop a kind of functionalized hydrophobic ionic liquid that can be used as extractants in liquid-liquid extraction of lithium from salt lake.

英文关键词： functionalized hydrophobic ionic liquids;liquid-liquid extraction;high magnesium/lithium ratio of brine;quantum chemistry calculation;COSMO-RS prediction