acid red 2BL and acid yellow RLN into hydrophobic ionic liquid[Bmim]PF6 was investigated.When the concentration of the dye solution was less than 1.0 g/L
ionic liq-uid had excellent extraction effect on the two dyes. And as the dye concentration increased
extraction rate of ionic liquids dropped. The effect of extraction at neutral and acidic pH conditions was good
and the ex-traction under alkaline conditions was relatively low. When the dye extraction temperature increased
the extraction rate improved subsequently.Moreover
at the selected experimental conditions
the extraction effect of ionic liquid on acid red 2BL was better than that on acid yellow RLN.