Development of rare-metal recycle system for the used high-tech products by combination of the high-recovery and selective recevery materials

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340075
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental conscious materials and recycle
• Research Institution: Gunma University
• Principal Investigator: Nagai Daisuke 群馬大学, 大学院理工学府, 助教 (30375323)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: レアメタル / 金属回収

Outline of Final Research Achievements

In this research, a variety of recovery materials were developed to construct a rare-metal recycle system for the used high-tech products by combination of the recovery materials. Melamine cyanurate was found to be a selective adsorbent for Pd(II) from a mixture of six metal ions. A high-recovery system was developed by complexation between trithiocyanuric acid (TCA) and melamine (Mel) through hydrogen bonding. The maximum recovery amount (1.248 gPd/gTCA-Mel) was greater than the previous reported materials. For the recovery of metals in organic solvents, a recovery system that involves homogeneous coordination during metal recovery and becomes heterogeneous for separation after recovery based on reversible association/dissociation between tetraamine and diol through hydrogen bonding. This system recovered Pd(II) or Cu(II) quantitatively.

Free Research Field

環境化学