Chemical complexation and separation of erbium and yttrium with HDEHP in non-equilibrium extraction system

Taking HDEHPasextractant, DTPA as chemical complex agent, the paper researched some factors which affected separation of erbium and yttrium with non-equilibrium solvent extraction from chloride solutions.Such as pH value, mixed time and concentration of DTPA.The results indicated that the rate of solvent extraction of Y was faster than that of Er by adding DTPA in water phase.By controlling the mixed time, we can separate effectively Y and Er with non -equilibrium solvent extraction.