| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Critical metals such as precious metals and rare earth metals are of great importance due to their wide application in various high-tech industries. A highly efficient and eco-friendly separation technique for the recovery of such metals from various resources is required. In this study, novel separation systems based on solvent extraction were developed using ionic liquids (ILs) and novel extractants, which we designed for the critical metals. The ILs were evaluated as an extractant without dilution for the separation of precious metals. A novel amic acid extractant, D2EHAG was shown to be effective for the recovery of the critical metals. These extractants were prepared as an adsorbent or ion exchange resin. It was demonstrated that it was important to create the reaction site favorable for a metal extraction at liquid-liquid or solid-liquid interface for the efficient extraction of the metal ion.
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