Application of ionic liquids for rare-earth recovery from waste electric materials

Fukiko Kubota, Masahiro Goto

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Rare-earth metals are essential for high-technology industries, and demands for rare-earth metals are increasing annually. Their stable supply must be ensured because the production of rare earths is limited to a few countries. Industrial waste and spent products, so-called «urban mines,» have been highlighted as valuable secondary resources. To promote metal recycling, highly efficient separation and recovery techniques are required. We have developed a novel separation technique based on liquid-liquid extraction using unique solvent ionic liquids. A newly synthesized extractant, diglycolamic acid, was used in the ionic-liquid systems. The extraction performance of rare-earth metals and selectivity to common metals were improved significantly. In this chapter, we describe the current state of recycling of rare earths, and summarize ionic-liquid-based extraction focusing on the recovery of rare-earth metals from waste electric materials. A liquid-membrane technique that uses ionic liquids is also introduced.

Original languageEnglish
Title of host publicationWaste Electrical and Electronic Equipment Recycling
Subtitle of host publicationAqueous Recovery Methods
PublisherElsevier
Pages333-356
Number of pages24
ISBN (Electronic)9780081020579
ISBN (Print)9780081020586
DOIs
Publication statusPublished - Jan 1 2018

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Kubota, F., & Goto, M. (2018). Application of ionic liquids for rare-earth recovery from waste electric materials. In Waste Electrical and Electronic Equipment Recycling: Aqueous Recovery Methods (pp. 333-356). Elsevier. https://doi.org/10.1016/B978-0-08-102057-9.00012-3