Recovery of yttrium and europium from spent fluorescent lamps using pure levulinic acid and the deep eutectic solvent levulinic acid-choline chloride

• Published in: RSC advances Vol. 1; no. 48; pp. 28879 - 2889
• Main Authors: Pateli, Ioanna M, Abbott, Andrew P, Binnemans, Koen, Rodriguez Rodriguez, Nerea
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 04.08.2020; The Royal Society of Chemistry
• Subjects: Aqueous solutions; Chemical precipitation; Chemistry; Chloride; Chlorides; Choline; Dissolution; Europium; Fluorescent lamps; Hydrochloric acid; Ionic liquids; Ions; Leaching; Levulinic acid; Materials recovery; Moisture content; NMR; Nuclear magnetic resonance; Oxalic acid; Phosphoric acid; Phosphors; Rare earth elements; Selectivity; Solubility; Solvent extraction; Solvent extraction processes; Solvents; Spectra; Yttrium; Yttrium oxide

A solvometallurgical approach for the recovery of rare-earth elements from lamp phosphor waste was developed. The solubility of individual phosphors in different deep-eutectic solvents (DESs) was measured. The DES levulinic acid-choline chloride ( x ChCl = 0.33) showed high solubility of the YOX pho...