Solvent Extraction for Separation of 99.9% Pure Cobalt and Recovery of Li, Ni, Fe, Cu, Al from Spent LIBs

In this work, hydrometallurgical recycling of metals from high-cobalt-content spent lithium-ion batteries (LIBs) laptops was studied using precipitation and solvent extraction as alternative purification processes. Large amounts cobalt (58% by weight), along with nickel (6.2%), manganese (3.06%) lithium (6.09%) are present in LiCoO2 Li2CoMn3O8 prominent Co-rich phases the electrode material. The pregnant leach solution (PLS) that generated leaching presence 10% H2O2 50 g/L pulp density at 80 °C for 4 h contained 27.4 Co, 3.21 Ni, 1.59 Mn 3.60 Li. PLS subjected to various pH 2 M NaOH but performance poor. To improve separation other impurities order avoid loss nickel, studies were carried out a technique di-(2-ethylhexyl) phosphoric acid (D2EHPA) bis-(2,4,4-trimethylpentyl) phosphinic (Cyanex 272). Overall, study examines fundamentals separating synthesizing 99.9% pure Co sulfate liquor laptop LIBs remarkably high content.