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The extraction behavior of five rare earth ions (RE3+) was investigated in ionic liquid (IL) extraction system using 1-butyl-3-methyl-irnidazolium hexafluorophosphate ([Brnim]PF6) ionic liquid as extraction solvent and 5,7-dichloro-8-hydroxy quinoline (HQ) as extractant.The extraction percentage of RE3+ using [Brnim]PF6 was less than 8% without HQ.When sufficient HQ was included in IL phase, the extraction percentage of RE3+ could be higher than 99% except La3+.The extracted species in the RE3+-[Brnim]PF6-HQ system was neutral REQ3 and complete recovery of RE3+ extracted into [Brnim]PF6 can be achieved using the mixture of hydrazine hydrate and ethylenediamine tetraacetic acid (EDTA) as stripping agent.[Brnim]PF6 can be recycled in the experiment.