白金族金属リサイクル技術の開発動向:易溶化プロセスと物理濃縮プロセス

Translated title of the contribution: Trends of technological development of platinum group metal recycling: Solubilization and physical concentration processes

Yu Ki Taninouchi, Toru H. Okabe

Research output: Contribution to journalArticlepeer-review

Abstract

Spent automobile catalysts are the most important secondary resource for platinum group metals (PGMs), and their recycling is essential not only to ensure a steady supply of PGMs but also to preserve the natural environment. However, several factors limit the efficiency of PGM recovery in current recycling processes. Specifically, PGMs represent a small proportion of the entire catalyst and are difficult to dissolve in aqueous solutions for subsequent separation. In recent decades, multiple technologies have been developed to make the recycling of PGMs more efficient and environment–friendly. Herein, we introduce the typical industrial processes for recovering PGMs from spent catalysts as well as established and emerging trends in the technological development of PGM recycling. Furthermore, we review novel recycling techniques for converting PGMs in spent catalysts into more soluble states and/or physically concentrating PGMs from spent catalysts.

Translated title of the contributionTrends of technological development of platinum group metal recycling: Solubilization and physical concentration processes
Original languageJapanese
Pages (from-to)294-304
Number of pages11
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume85
Issue number8
DOIs
Publication statusPublished - 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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