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.
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.
In the framework of ETN REDMUD, an integrated process was developed by KU Leuven and RWTH Aachen to selectively recover Fe and REEs from slags produced during smelting of bauxite residue. The work is published in Hydrometallurgy.
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.
December 1st, 2018|Comments Off on Recovering rare earths from old TVs and computer screens
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.
SIM² KU Leuven researchers have developed a novel approach to separate samarium from cobalt originating from SmCo magnets. Their newly published paper introduces very simple and cheap-to-maintain solvent extraction processes.
Within the EU Horizon 2020 REMAGHIC project, SIM² KU Leuven developed a novel process to recover rare earths (REEs) from lamp phosphor waste by dissolution in concentrated methanesulphonic acid (MSA), which is a green solvent.
In the context of the EU Horizon 2020 MSCA-ETN REDMUD project, an international team of researchers have published one of the most detailed ever characterisation studies of the occurrence of scandium in Greek bauxite (residue).
In collaboration with Umicore, SIM² KU Leuven researchers investigated the thermal stability of the ionic liquid Cyphos IL 101 under various experimental conditions. The work was published in the journal Phys. Chem. Chem. Phys.
In the framework of the ERC SOLCRIMET project SIM² KU Leuven researchers developed a versatile procedure to prepare phosphinate and phosphonate compounds, which are instrumental as solvent extraction reagents for multiple metals.
Together with Umicore SIM² KU Leuven researchers have developed a new process to purify crude indium(III) hydroxide, In(OH)3, using a combined leaching/extraction system exploiting the properties of the ionic liquid [Hbet][Tf2N].
In the framework of the ERC SOLCRIMET project KU Leuven researchers have found that replacement of water by ethylene glycol provides enhanced selectivity in the solvent extraction of transitions metals from rare earth elements.
This new RSC Advances paper demonstrates the effectiveness of a novel supported ionic liquid phase (SILP) for the uptake of REEs (Sc, Y, Nd, Dy) in the presence of base elements (Ca, Al, Fe) from bauxite residue (BR) leachates.
This new Hydrometallurgy paper by Kumar Batchu and Binnemans studies the effect of the diluent) on the solvent extraction of Nd using D2EHPA as extractant. Studied diluents varied from aliphatic, aliphatic-aromatic to aromatic.
Following their previous work on the rare-earth Balance Problem, Prof. Binnemans et al. have published a new (Golden Access) review paper in the Journal of Sustainable Metallurgy. The paper has been downloaded > 1,000 times.
Ionic liquids (ILs) are widely studied to recover metals from ores or end-of-life products, but not above 100 °C and atmospheric pressure. Here the IL [Hbet][Tf2N] was used dry to leach NdFeB magnets and scrap at high temperature.
In the framework of the EU Horizon 2020 ERC SOLCRIMET project KU Leuven researchers have synthesised trichloride ionic liquids (ILs) which can be used for oxidative dissolution of metals and alloys under mild conditions.
In the context of the EU Horizon 2020 MSCA-ETN REDMUD project, KU Leuven researchers have published a new method to extract rare earths (REEs) from bauxite residue (red mud) by dry digestion followed by water leaching.