Akademik Veri Yönetim Sistemi
77th Geological Congress of Türkiye, Ankara, Türkiye, 14 - 18 Nisan 2025, ss.493, (Özet Bildiri)
Leaching of bastnäsite minerals usually requires strong acidic orbasic solvents that concern the world’s environmental agencies. Different countries impose various bans on leaching solutions and chemical additives, ranging from transportation to trade. Although some are not environmentally restricted, it is often quite costly to carry studies beyond laboratory-scale experiments, and these studies usually end up as articles in well-known journals. In recent years, these types of solutions are referred in literature as ionic liquid, deep eutectic solution, natural deep eutectic solution, non-aqueous solution, and low-cost water-free solutions have been prepared, and then these solutions have been examined in terms of their leaching performances for rare earth element carbonates both for individual and multiple mixtures. It has been seen that the leaching abilities of different rare earth elements improve when mixed with other elements, though this depends on the type of solution used. This is due to the synergistic effect that occurs in multi-mixtures. Still, there is a tendency to decrease leaching efficiency for multi-mixture carbonates in the general picture. Since the solvents produced in the study were designed for use in industrial application areas, significant properties, such as viscosity and conductivity, were prioritized, and the solvent preparation was made accordingly. The study’s findings on both the leaching of single rare earth carbonates and the leaching of mixtures of multiple rare earth carbonates can be used as a replacement alternative for the strong acids that are currently used in the industry.
Keywords: Bastnäsite mineral, green chemistry, leaching processes.