2026-06-24 スウェーデン王国・チャルマース工科大学
＜関連情報＞
- https://www.chalmers.se/en/current/news/k-safer-recycling-of-metals-from-spent-batteries/
- https://pubs.rsc.org/su/article/4/7/2978/1225255/Safer-aromatic-process-diluents-for-solvent
使用済み電池から重要金属を溶媒抽出するための、より安全な芳香族プロセス希釈剤
Safer aromatic process diluents for solvent extraction of critical metals from spent batteries
Daniel Keywan Hoffmann;Mark R. StJ. Foreman
RSC Sustainability Published:07 May 2026
DOI:https://doi.org/10.1039/d6su00096g
This paper presents the demonstration of two aromatic compounds 1,4-di-tert-pentylbenzene and 1-methyl-4-(tert-pentyl)benzene as safer alternative process diluents in the application of critical metal recovery. Recycling of batteries is needed, and within the hydrometallurgy recycling route, solvent extraction (SX) offers a highly efficient, highly selective and low energy separation technique. Besides available options for sustainable, aliphatic diluents like HVO100, aromatic alternatives, suitable for both laboratory and industrial use, are deficient. Synthesis and characterization (NMR and GC-MS) are provided and important process parameters (boiling point, flash point, viscosity, solubility, density, surface tension and inter-surface tension) were measured. Eligibility of the aromatic diluent candidates was investigated by solvent extraction using Aliquat 336, DEHPA and Cyanex 272 as extractants with various experimental conditions and metal compositions of typical battery metals like nickel (Ni), copper (Cu), cobalt (Co), manganese (Mn) and rare earth elements (REEs). Performance was compared with that of commercially used diluents.
