2020 Fiscal Year Final Research Report
Basic study of metal ion isolation technology with switchable solvent
Project/Area Number |
18K18966
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 27:Chemical engineering and related fields
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Research Institution | Tohoku University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
SmithRichard Le 東北大学, 環境科学研究科, 教授 (60261583)
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Project Period (FY) |
2018-06-29 – 2021-03-31
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Keywords | 水熱酸浸出 / リチウムイオン電池 / リサイクル / 金属単離 / 配位子 |
Outline of Final Research Achievements |
Based on the necessity of green process, we studied the budding technology of metal isolation and concentration process using hydrothermal mixed solvent system, which is defined as a solvent with variable properties, as a wet process contributing to LiB battery recycling technology using only water as a solvent. In the hydrothermal organic acid leaching, it was suggested that Mn could be isolated by selecting the organic acid and conditions. It was also shown that Ni and Co could be concentrated by solid-liquid separation by adding appropriate ligands to aqueous organic acid solutions containing Li, Co, and Ni. Subsequently, Li could be precipitated by mixing phosphoric acid with an aqueous organic acid solution containing Li.
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Free Research Field |
化学工学
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Academic Significance and Societal Importance of the Research Achievements |
Sustainable Development Goals(SDGs)に基づき、全ての人々が安心してエネルギーにアクセスできる権利を持つべきとの主張がなされたことにより、リチウムイオン電池(Li-ion battery: LiB)の需要は今後爆発的に高まり、それによる原料の価格高騰と廃棄物量の増大は容易に予想できる。資源量および価格安定には、自国内で流通する資源量を一定以上維持する努力が必要であり、すなわち廃棄されるLiBを二次資源とみなすリサイクル技術の開発が急務となる。本研究は、この社会要請にしたがったものであり、環境低負荷・価格合理的なリサイクル技術の開発を目指した研究である。
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