The Use of Hypercrosslinked Polystyrene Sorbents in Extraction of Valuable Components from Nitric Acid Leach Solutions of Eudialyte Concentrate

• Published in: Journal of mining science Vol. 60; no. 3; pp. 476 - 484
• Main Authors: Chanturia, V. A., Ryazantseva, M. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-06-2024; Springer Nature B.V
• Subjects: Cations; Components; Concentration gradient; Copolymers; Divinylbenzene; Earth and Environmental Science; Earth Sciences; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Mineral Dressing; Mineral Resources; Nitric acid; Nitric acids; Polystyrene; Polystyrene resins; Recovery; Resins; Separation; Sorbents; Subgroups; Zirconium; eudialyte concentrate; hypercrosslinked polystyrene sorbents; selective recovery; rare earth elements; pregnant nitric acid leach solution
• ISSN: 1062-7391; 1573-8736
• DOI: 10.1134/S1062739124030141

The article describes the experimental results of using synthetic sorbents made of hypercrosslinked polystyrene copolymers with divinylbenzene and vinylpyridine for recovery and separation of valuable components (Zr, 
 REE) from pregnant solutions of nitric acid leach of eudialyte. It is found that at the stage of Zr and 
 REE recovery from pregnant solutions, the most effective are resin Puromet MTS 9500 and bifunctional strongly acidic cation exchanger Purolite C160. Regarding Puromet MTS 9500, a flowsheet of step-by-step gradient elution of the sorbent saturated with valuable component is proposed. The flowsheet enables the outlet solutions of Zr and 
 REE at the recovery of 97.7 and 81.1%, respectively. Efficient separation of REE to subgroups is reached with resin VP-3AP.