Title:
METHOD FOR RECOVERING NOBLE METAL
Document Type and Number:
WIPO Patent Application WO/2010/021341
Kind Code:
A1
Abstract:
A method for recovering gold, which comprises a first step wherein a gold layer (12) of a composite material (10), wherein the gold layer is formed on a copper plate (11), is converted into an Au-Zn-Cu alloy layer (12a) containing zinc by having zinc act on the gold layer (12), and a second step wherein the Au-Zn-Cu alloy layer (12a) is converted into a gold enriched layer (12b) by eluting zinc contained in the Au-Zn-Cu alloy layer (12a) using a dissolving liquid.
Inventors:
MAEDA Masafumi (3-1 Hongo 7-chome, Bunkyo-k, Tokyo 54, 〒1138654, JP)
Application Number:
JP2009/064513
Publication Date:
February 25, 2010
Filing Date:
August 19, 2009
Export Citation:
Assignee:
THE UNIVERSITY OF TOKYO (3-1 Hongo 7-chome, Bunkyo-ku Tokyo, 54, 〒1138654, JP)
国立大学法人東京大学 (〒54 東京都文京区本郷七丁目３番１号 Tokyo, 〒1138654, JP)
国立大学法人東京大学 (〒54 東京都文京区本郷七丁目３番１号 Tokyo, 〒1138654, JP)
International Classes:
C22B11/00; B09B3/00; C22B7/00; C22B11/02; C22B11/00; B09B3/00; C22B7/00
Attorney, Agent or Firm:
SUYAMA Saichi (Kanda Higashiyama Bldg, 1 Kandata-cho 2-chom, Chiyoda-ku Tokyo 46, 〒1010046, JP)
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