[P] P231~P243 Materials Processing

[P231] High-Purity Separation of Nickel and Cobalt in Ethylene Glycol

○Hiromitsu Mori¹, Hironori Hondoh¹, Shusuke Okamoto¹, Daisuke Nagai¹ (1. Univ. of Shizuoka)

Keywords:

Separation and purification,Rare metals,Minor metals,lithium-ion battery,Lithium-ion batteries (LIBs),Recycling

Heating an ethylene glycol solution containing NiSO₄ and CoSO₄ at 190 °C for 12 h in the presence of tetramethylammonium sulfate resulted in Ni selectivity/recovery of 97%/94% and Co selectivity/recovery of 98%/99%. This simple heating process enables the high-purity separation of Ni and Co from a mixed metal sulfate solution.