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Title:
SiC系物質からの金または白金族元素の回収方法
Document Type and Number:
Japanese Patent JP4984123
Kind Code:
B2
Abstract:

To establish a method where the used material of a catalyst for exhaust gas purification using SiC anticipated that activity will increase from now is treated, and a noble metal(s) such as gold or a platinum group comprised therein is recovered.

A noble metal(s) is recovered by a method through: a first stage where an SiC-based substance comprising a noble metal(s) such as gold and a platinum group element(s) is subjected to oxidation treatment together with molten metal copper in a first furnace, and a molten oxide layer essentially consisting of Si oxide and copper oxide as the upper layer molten layer, and a molten residual metal copper layer comprising the noble metal(s) as the lower layer molten layer are formed, so as to be separated, thus the noble metal(s) is recovered into the molten residual metal copper layer; a second stage where the oxide is subjected to reduction treatment in a second furnace, and a molten reduced metal copper layer as the lower molten layer, and a molten residual oxide layer as the upper molten layer are formed, so as to be separated; and a third stage where the molten reduced metal copper is used as the molten metal copper in the first stage, and repetition is performed.

COPYRIGHT: (C)2008,JPO&INPIT


Inventors:
Takeshi Matsumoto
Kenichi Tayama
Application Number:
JP2006267145A
Publication Date:
July 25, 2012
Filing Date:
September 29, 2006
Export Citation:
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Assignee:
DOWA Metals & Mind Co., Ltd.
Nippon PGM Co., Ltd.
International Classes:
C22B11/02; B01J23/96; B01J38/00; B09B3/00; C22B7/00
Domestic Patent References:
JP2000248322A
JP2003301225A
JP2004068071A
JP63161129A
JP61223138A
JP1189348A
JP4317423A
JP2004269936A
JP2004277792A
Attorney, Agent or Firm:
Kenji Wada
Komatsu Taka