Task Specific Ionic Liquids (TSILs) were generated by association between a cationic amido functionalized analogues of glycine-betaine (AGB) and coordinating anions such as dicyanamide (Dca^-), 4-chlorosalicylate (ClSal^-), saccharinate (Sac^-) and weak coordinating one such as bis(trifluorosulfonyl)imide (Tf₂N^-). Extraction of Cu(II), Ni(II), Co(II), from pure water and salt media was performed with these AGB-ILs at room temperature. The obtained results show that in pure water Clsal based AGB-ILs have a high extraction efficiency towards these metals, whereas dicyanamide based AGB-ILs may extract efficiently Cu(II). In some cases, extraction can be improved by using simple chaotropic salts or intermediate anion such as NO₃^- or Cl^-. Co(II) may be quantitatively extracted by Dca based AGB-ILs in NaCl 4 mol.L^-1. The rational use of background salts can improve the selectivity of the extraction process and allow the separation and the recovery of the three metals separately from a mixture containing two or three divalent metals. The metal could be back-extracted from the ionic liquid phase with aqueous solution of Na₂SO₄, limiting the release of ionic liquid cation in aqueous media, thus preserving its integrity. The metal extractability by the Dca based ionic liquids after the stripping is quasi-equivalent to that of the fresh AGB-IL showing that it can be reused for three or four extraction and stripping cycles. A regeneration of Dca based ionic liquids after several extraction cycles is made possible by adding a solution of NaDca which restore their extractive capacity.

任务的具体的离子液体（功能化离子液体）通过相关联的阳离子酰氨基之间产生甘氨酸甜菜碱（AGB）的官能化的类似物和配位阴离子，如二氰胺（DCA ^- ），4-氯水杨酸（ClSal ^- ），糖精（SAC ^- ）和弱协调一个如双（三氟磺酰）亚胺（TF ₂ ñ ^-）。在室温下用这些AGB-IL从纯水和盐介质中萃取Cu（II），Ni（II），Co（II）。获得的结果表明，在纯水中，基于Clsal的AGB-ILs对这些金属具有很高的提取效率，而基于双氰胺的AGB-ILs可以有效地提取Cu（II）。在某些情况下，提取可以通过使用简单的离液盐或中间体阴离子如NO改善₃ ^-或Cl ^- 。Co（II）可以通过Dca基AGB-IL在NaCl 4 mol.L ^-1中定量提取。合理使用背景盐可以提高萃取过程的选择性，并允许从包含两种或三种二价金属的混合物中分离和回收三种金属。可以使用Na ₂ SO ₄水溶液从离子液相中反萃取金属，从而限制离子液体阳离子在水性介质中的释放，从而保持其完整性。汽提后Dca基离子液体对金属的可萃取性与新鲜AGB-IL相当，表明它可重复使用三个或四个萃取和汽提循环。通过添加可恢复其萃取能力的NaDca溶液，可以使Dca基离子液体在几个萃取循环后再生。