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Citation: ZHU Taofeng, GUO Miao, WANG Sui, JIANG Jun, HU Kewei, ZHAO Lingling, LIANG Hongze. Microwave-assisted Synthesis of Phosphine-Functionalized Ionic Liquids and Investigation on Extraction of Rare Earth Ions[J]. Chinese Journal of Applied Chemistry, ;2014, 31(5): 529-535. doi: 10.3724/SP.J.1095.2014.30371 shu

Microwave-assisted Synthesis of Phosphine-Functionalized Ionic Liquids and Investigation on Extraction of Rare Earth Ions

1.
Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China

Corresponding author: LIANG Hongze,
Received Date: 22 July 2013
Available Online: 23 September 2013
Fund Project: 浙江省自然科学基金资助项目(Y4100113) (Y4100113)

Five phosphine-functionalized ionic liquids,1-propyl-3-[3-(diphenylphosphinyl) propyl]imidazolium bis(trifluoromethylsulfonyl) amide([PImC₃P(O)Ph₂][Tf₂N]),1-hexyl-3-[3-(diphenylphosphinyl) propyl]imidazolium bis(trifluoromethylsulfonyl) amide([HImC₃P(O)Ph₂][Tf₂N]),1-propyl-3-[3-(phenylethoxyphosphinyl) propyl]imidazolium bis(trifluoromethylsulfonyl) amide([PImC₃P(O)Ph(OEt)][Tf₂N]),1-hexyl-3-[3-(phenylethoxyphosphinyl) propyl]imidazolium bis(trifluoromethylsulfonyl) amide([HImC₃P(O)Ph(OEt)][Tf₂N]) and 3-(phenylethoxyphosphinyl) propyltriethylamonium bis(trifluoromethylsulfonyl) amide([TENC₃P(O)Ph(OEt)][Tf₂N]),were successfully synthesized by microwave-assisted synthesis.All compounds were characterized by ³¹P NMR,¹H NMR,¹³C NMR,HRMS and FT-IR.These ionic liquids were studied as extraction agents for Nd(Ⅲ) ions.The results show that ionic liquids can be used as a single component agent to extract rare earth without the addition of organic diluents and the structure of ionic liquids greatly influences the extraction efficiency.[TENC₃P(O) Ph(OEt)][Tf₂N]ionic liquid with quaternary ammonium exhibits the best extraction efficiency.The pH value of extraction systems has a significant impact on the extraction efficiency.The highest extraction efficiency is achieved under pH=6.63,while more than 94% of Nd(Ⅲ) can be stripped from the loaded organic phase under pH=1.00.
- microwave-assisted synthesis,
- ionic liquid,
- organophosphorus,
- rare earth,
- extraction
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