稀释剂对有机膦功能化离子液体萃取钕(Ⅲ)的影响

Influence of Diluent on Extracting Neodymium( Ⅲ)by Phosphoryl- functionailzed Ionic Liquid System

设计、合成了有机膦单功能化离子液体1-丙基-3-(3-二乙氧基氧膦基)丙基咪唑双(三氟甲烷磺酰基)亚胺盐离子液体[C_3ImP(O)(OEt)_2][NTf_2](IL-1)和有机膦双功能化的离子液体1,3-双-{3-(二乙氧基氧膦基)}-1氢-咪唑双(三氟甲基磺酰基)亚胺盐[BDPPIm][NTf_2](IL-2)。离子液体IL-1和IL-2的结构经红外、核磁和高分辨质谱确认。以IL-1和IL-2作为萃取剂,考察了萃取剂、萃取剂浓度以及稀释剂对Nd(Ⅲ)离子萃取的影响。研究结果表明,萃取效率与功能化离子液体的结构、稀释剂类型有很大关系。萃取机理可能是中性络合机理。

Ionic liquids,1- propyl- 3-（ 3- diethoxyphosphinyl） propyl imidazole bis（ trifluoromethanesulfonyl） imide[C3ImP（O）（OEt）2][NTf2]（ IL- 1） and 1- propyl- 3-（ 3- diethoxyphosphinyl） propyl imidazole bis（ trifluoromethanesulfonyl） imide ionic liquid [BDPPIm][NTf2]（ IL- 2） were prepared and characterized by IR,NMR and HRMS spectroscopy. The extraction behavior of neodymium（ Ⅲ） by these ionic liquids undiluted or diluted in different molecular diluents was studied in regard to the nature of extractants and diluents,and extractant concentration. The results indicated that extraction efficiency is highly influenced by extractants and combination of extractant with diluent. Neutral complexation mechanism was proposed.