DESignSX
Project Description
Sustainable metallurgy stands uniquely poised to reduce the environmental impact of existing processes whilst recovering the metal value in end-of-life devices, thereby closing the resource loop. Despite their growing demand and geopolitical criticality, lanthanide separation remains technologically challenging due to the small monotonic variation in their properties, negatively affecting the economics of their recycling. In this context, the ERC-funded DESignSX project will use non-ionic hydrophobic eutectic solvents (DES) for lanthanide separation through solvent extraction (SX).
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The project endeavors to enhance lanthanide separation by augmenting steric factors that dictate the interactions between lanthanide ions and ligands, achieved by incorporating complexing agents as constituents of DES. Given that the separation of adjacent lanthanide cations occurs over dozens of counter-current extraction stages, even seemingly small increases in the separation factors yield measurable environmental and economic gains. DESignSX relies on a tandem experimental-computational approach spanning multiple time and size scales, from a molecular description of pair-wise interactions to laboratory-scale process optimisation. DESignSX aims to overcome the traditional SX issues of complex flowsheets, third-phase formation, toxicity of the organic diluent through the inclusion of bio-derived components, and entrainment losses, whilst improving the selectivity of the separation. DESignSX outcomes are expected to be transferable to other critical SX separations.
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Project within CICECO
Latest News
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​15/11/2025 - Welcome to Michele D'Amico, the newest PhD student, who will study by molecular dynamics the solvation of metal ions in DES and its relevance to solvent extraction. Good luck!
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​01/11/2025 - Welcome to Bruna Ferreira, a joint PhD student with Professor Pedro Carvalho of CICECO, who will investigate the inclusion HES within membrane reactor designs relevant to their application. All the best to Bruna!
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13-15/10/2025 - Nicolas Schaeffer presented on solvent design for lanthanide separation at East China University of Science and Technology (China) as part of the creation of joint research center between CICECO and ECUST. More information on this initiative can be found here.
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09/10/2025 - The DESignSX team presented their recent works at Jornadas de CICECO 25 in Ílhavo (PT), a great day of discussion!
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17/09/2025 - Welcome to visiting PhD student Aboubakar Bakayoko from ICSM (France), supervised by Sandrine Dourdain and Guilhem Arrachart, investigating the characterisation and application of DES for the recovery of uranium.
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3-5/09/2025 - The DESignSX team was at the 7th International Conference on Wastes in Funchal (Portugal), presenting their latest efforts in providing alternative solvents to tackle metal recovery.
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01/09/2025 - Welcome to Eva Fouillet, a Engineering School student from Polytech Lyon (France), who is carrying out her research internship investigating the intercomponent interaction in DES.
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31/07/2025 - Our latest publication in Green Chemistry investigates the recycling of rare earth elements a diglycolamide-based hydrophobic eutectic solvent. The work is a result of an international collaboration between the University of Aveiro and Institut de Chimie Séparative de Marcoule (France), thank you to all the contributors!
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20-24/07/2025 - Participation of DESignSX members at the IUPAC International Conference on Chemical Thermodynamics 2025 in Porto (Portugal). Inês Vaz presented the team's recent work on the quantification of the thermal signature of metal partition in biphasic systems. More information can be found here.