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Recovery of platinum using magnesium vapor

Published online by Cambridge University Press:  31 January 2011

Toru H. Okabe ,
Sachiko Yamamoto ,
Yoshihiro Kayanuma  and
Masafumi Maedaaff
Toru H. Okabe
Affiliation:
The Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8505
Sachiko Yamamoto
Affiliation:
Department of Metallurgical Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino-City, Chiba, Japan 275-0016
Yoshihiro Kayanuma
Affiliation:
The Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8505
Masafumi Maedaaff
Affiliation:
The Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8505
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Abstract

To develop an effective process for the recovery of precious metals from scrap, we investigated a new platinum extraction process using alloy formation by magnesium vapor and successive leaching with an aqueous solution. Pure platinum plates were reacted with magnesium vapor at constant temperatures ranging between 873 and 1173 K for 3 h, and Mg–Pt alloy samples were synthesized. The obtained Mg–Pt alloy was then dissolved in aqua regia or in an aqueous HCl solution at room temperature. Platinum was recovered from the leaching solution by conventional precipitation technique, and the platinum obtained by each process was analyzed chemically. It was found that 94% of the platinum was recovered by this process. After Mg vapor treatment, 100% of the platinum was dissolved when kept in aqua regia for 1 h, whereas only 25% of untreated pure platinum was dissolved when kept in aqua regia for 4 h.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 8 , August 2003 , pp. 1960 - 1967
Copyright
Copyright © Materials Research Society 2003

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References

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