Germanium is a precious metal which is mainly used as a semiconductor in electronics and infrared optic industries, and as a polymerisation catalyst for the production of polyethylene terephthalate. Due to its high supply risk and its high economic importance, germanium is considered as one of Europe’s critical metals.
A solvometallurgical route for recycling of SmCo permanent magnets was developed by researchers from the SOLVOMET Group (SIM² KU Leuven). The method is based on non-aqueous solvent extraction to minimize water consumption.
The work is published in Separation and Purification Technology.
In the framework of the EU MSCA-ETN REDMUD project, the occurrence mode of selected rare earths in neutralised-leached bauxite residue was studied by KU Leuven and NTUA. The work is published in Journal of Sustainable Metallurgy.
The SOLVOMET Group (SIM² KU Leuven), which develops solvometallurgical flow sheets, has synthesized new Deep Eutectic Solvents that can selectively dissolve metal oxides from industrial residues derived from the mining industry.
Within the EU H2020 SOCRATES project, SIM² KU Leuven developed a process to selectively recover lead and zinc from iron-rich jarosite residue of the zinc industry. The work is published in ACS Sustainable Chemistry & Engineering.
Within the EU REMAGHIC project, KU Leuven developed a process to recover yttrium and europium from a mixed oxide obtained by the processing of lamp phosphor waste based on solvent extraction with undiluted thiocyanate ionic liquids.
Researchers at SIM² KU Leuven & VVSG investigated the circularity of the household metal packaging cycle in Flanders. They found remarkable discrepancies between experimental (sorting) data and reported literature data.
Metals in spent samarium-cobalt magnet can be recovered by oxidative dissolution of metals in trichloride ionic liquids, followed by metal removal from the leachate with a series of stripping steps. The ionic liquids can be reused for next cycles after regeneration.
Within the EU H2020 REMAGHIC project, a process was developed by KU Leuven & TECNALIA to recover rare earths from CRT phosphor waste based on roasting and leaching with the green solvents acetic acid and methanesulphonic acid.
New work by SIM² KU Leuven researchers published in Resources Conservation and Recycling demonstrates that the government policies have a much larger influence on the rare-earth supply chain disruption than physical disruptions.
SIM² KU Leuven researchers developed a new, selective method to recover indium from iron-rich solutions. This work, funded through EU METGROW+, was published as a golden open access paper in Separation and Purification Technology.
SIM² KU Leuven researchers developed a new method to recover valuable rare earth elements from waste CRT phosphor powder, using selective sulfation roasting and water leaching. This work was published in Hydrometallurgy.
KU Leuven researchers developed new leaching solutions to dissolve metals, based on non-volatile ionic liquids (ILs). This work on dissolving gold without gas formation was published in Green Chemistry.
The extraction of lanthanides from nitrate media with basic nitrate extractants shows a remarkable decreasing trend when going from left to right in the lanthanide series. The Binnemans SOLVOMET group is taking the first step.