Extraction of lithium from β-spodumene using sodium ...
The extraction efficiencies with two kinds of additive (CaO and NaOH) were compared. • Up to 93.30% Li was extracted using Na 2 SO 4 solution with additive of CaO.. Extraction was based on ion-exchange between Li + from β-LiAlSi 2 O 6 and Na + from Na 2 SO 4.. Na 2 SO 4 in mother solution could be recycled to leaching process for reuse.