PEPR Recycling Project – Implementation of chromatography in hydrometallurgical processes

The PEPR recycling program—strategic metals axis—funds projects on recycling strategies for critical metals. As part of this program, the GeoRessources laboratory is investigating the implementation of chromatography in hydrometallurgical processes.

Conventional hydrometallurgical processes are based on liquid-liquid extraction, flotation, and column separation. However, recent research aims to explore the possibility of:
♦ new extractant molecules,
♦ new solid supports,
♦ and waste reduction.

Chromatography, a mature technology in pharmaceuticals but little used in hydrometallurgy, could:
♦ offer higher theoretical stages at lower cost,
♦ avoid extractant losses,
♦ reduce environmental impact and operator risks.

This project evaluates its implementation in hydrometallurgical processes to separate rare earth elements and compares it to liquid-liquid extraction systems