1997 Fiscal Year Final Research Report Summary
Development and application for waste materials of enhanced leaching of nickel with transition metal complex as a catalyst
| Project/Area Number |
07555224
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
TOKUDA Masanori Center for Interdisciplinary Research, Tohoku University, PROFESSOR, 教授 (30006027)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Satoshi Institute for Chemical Reaction Science, Tohoku University, RESEARCH ASSOCIATE, 助手 (60232849)
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| Project Period (FY) |
1995 – 1997
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| Keywords | leaching / enhanced dissolution / nickel / waste materials / metal complex / nitric solution / 加水分解 / 高速 |
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| Research Abstract |
Recently, the recycling of metal containing used products is recognized to be important issue from the view point of an effective utilization of resources and an environmental harmony. The development of recycling processes of rare metals is highly demanded. In this project, a leaching process of enhanced dissolution of metals in the transition metal complex solution has been constracted. The nitric iron solution was specially used as an electron transfer mediator. The dissolution rate of metallic nickel plate in aqueous nitric iron solutions was studied at rotation speed of 0-3000 rpm and the temperature of 10-105 degree C.It was found that, among various factors that affect the dissolution rate, Fe (III) concentrationplays most important role. The dissolution rate of nickel significantly increased with an increase in the temperature and in Fe (III) concentration. With an optimum iron concentration, it was about twenty-forth times larger than that of nitricacid without iron. The practical application of this process to the treatment of batteries, used catalyst, etc. showed successful result with very high leaching rate.
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