Importance

Loading Importance Indicators...

Abstract

According to the present invention there is provided a method for the extraction of one or more valuable metals, preferably Li, Co, Mn and/or Ni, from black mass end-of-life battery waste, the method comprising the steps of: obtaining the black mass having a content of the one or more valuable metals; subjecting the black mass to a hydrothermal extraction medium defined by a molar excess of molten elemental sulfur, a predetermined amount of water, a first predetermined temperature and a first predetermined heated pressure, over a first predetermined period to provide a sulfur/metal roasted material; and converting the sulfur/metal roasted material to its respective metal sulfate/s by subjecting the sulfur/metal roasted material to an extraction medium defined by an excess of water, a flow of air, at a second predetermined temperature, at a second predetermined heated pressure over a second predetermined period.

Loading the Abstract Image...

First Claim