METHOD FOR COLLECTION OF VALUABLE METAL FROM ITO SCRAP

Title:

METHOD FOR COLLECTION OF VALUABLE METAL FROM ITO SCRAP

Document Type and Number:

WIPO Patent Application WO/2008/053616

Kind Code:

A1

Abstract:

A method for collecting a valuable metal from an indium-tin oxide (ITO) scrap, characterized by collecting metal indium by the electrolysis of the ITO scrap; a method comprising conducting the electrolysis of the ITO scrap in an electrolytic bath partitioned by a septum or an ion exchange membrane, removing an anolyte temporarily, removing tin from the anolyte by a neutralization technique or a substitution technique, placing a solution produced by the removal of tin into the cathode side again, conducting the electrolysis of the solution, and collecting metal indium selectively; or a method for collecting a valuable metal from an ITO scrap, comprising preparing a solution containing In and Sn in an ITO-electrolyzing bath, removing Sn from the solution, and collecting In in the collecting bath. It becomes possible to provide a method for collecting metal indium at high efficiency from an ITO sputtering target or an ITO scrap (e.g., a ITO waste) produced during the production of the ITO sputtering target.

Inventors:

SHINDO YUICHIRO (JP)
TAKEMOTO KOUICHI (JP)

Application Number:

PCT/JP2007/062895

Publication Date:

May 08, 2008

Filing Date:

June 27, 2007

Export Citation:

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Assignee:

NIPPON MINING CO (JP)
SHINDO YUICHIRO (JP)
TAKEMOTO KOUICHI (JP)

International Classes:

C25C1/22; C22B3/00; C22B25/06

Foreign References:

JP2003247089A	2003-09-05
JPS62290900A	1987-12-17
JPH0841560A	1996-02-13
JPH0382720A	1991-04-08
JP2000169991A	2000-06-20
JP2002069684A	2002-03-08
JP2002069544A	2002-03-08
JP2002241865A	2002-08-28

Other References: