Research Results

Deep Eutectic Solvents for solubilisation of metal oxides

March 4th, 2019|0 Comments

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.

  • Cover paper Fe-rich industrial residue

Selective metal recovery from Fe-rich industrial residues

March 4th, 2019|0 Comments

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.

Ionic liquids for REE recovery from lamp phosphor waste

February 18th, 2019|0 Comments

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.

Selective REE recovery from bauxite residue slags

January 28th, 2019|0 Comments

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.

  • Cover paper Jo Van Caneghem on household metal packaging

How circular is the household metal packaging cycle?

January 28th, 2019|0 Comments

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.

  • Visual abstract paper on metals recovery from spent samarium-cobalt magnets

Metal recovery from spent samarium-cobalt magnets

January 28th, 2019|0 Comments

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.

  • Cover CRT paper RSC Advances

Reclaiming the treasure hidden in old CRT monitors and TVs

January 17th, 2019|0 Comments

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.

Are Chinese policies disrupting the REE supply chain?

December 18th, 2018|0 Comments

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.

  • Cover page indium recovery paper

New process to recover indium from iron-rich solutions

December 12th, 2018|0 Comments

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.

  • Cover paper CRT phosphor powder

Recovering rare earths from old TVs and computer screens

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.

  • Key visual Green Chemistry paper on dissolving gold with safe aqua regia

Green (IL-based) solvents developed to dissolve gold

November 15th, 2018|0 Comments

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.

  • Image Paper Bieke Onghena et al in RSC ADV. on the Negative Sequence

The Quest of the Negative Sequence (for extraction of REEs)

October 25th, 2018|0 Comments

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.

  • Sm/Co separation from SmCo magnets

Novel Sm/Co separation process for SmCo magnets

August 14th, 2018|0 Comments

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.

MSA: a green solvent for the recovery of REEs

August 2nd, 2018|0 Comments

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.

Scandium in Greek bauxite and bauxite residue

May 22nd, 2018|0 Comments

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).

Thermal stability of ionic liquid Cyphos IL 101

May 21st, 2018|0 Comments

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.

Novel approach to phosphinates and phosphonates

May 21st, 2018|0 Comments

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.

Purification of In(OH)3 using the IL [Hbet][Tf2N]

May 9th, 2018|0 Comments

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].

Non-aqueous SX provides enhanced separations

April 2nd, 2018|0 Comments

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.

Separation of REEs from bauxite residue leachate

March 30th, 2018|0 Comments

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.

New paper on the effect of the diluent in REE SX

March 20th, 2018|0 Comments

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.

New Rare-Earth Balance Problem review paper

March 17th, 2018|0 Comments

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 liquid-based solvoleaching of NdFeB magnets

March 13th, 2018|0 Comments

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.

Trichloride ionic liquids for dissolving metals

February 20th, 2018|0 Comments

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.

Extraction of rare earths from bauxite residue

February 19th, 2018|0 Comments

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.