The rare earth concentrate produced at the Saint Fons plant is sent to the Solvay plant in La Rochelle where it undergoes further thermal and chemical processing.

The concentrate is dissolved through hydrometallurgical process and the rare earths are separated and purified using the unique expertise in liquid extraction of the technical teams from La Rochelle.


Once separated and purified, the rare earths are then reformulated into new phosphor precursors that will be reused in the production of new energy-saving lamps.