Method for collection of valuable metal from ITO scrap
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United States of America Patent
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Sep 6, 2011
Grant Date -
Apr 8, 2010
app pub date -
Jun 27, 2007
filing date -
Oct 24, 2006
priority date (Note) -
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Abstract
Proposed is a method for collecting valuable metal from an ITO scrap in which a mixture of indium hydroxide and tin hydroxide or metastannic acid is collected by subjecting the ITO scrap to electrolysis in pH-adjusted electrolyte, and roasting this mixture as needed to collect the result as a mixture of indium oxide and tin oxide. This method enables the efficient collection of indium hydroxide and tin hydroxide or metastannic acid, or indium oxide and tin oxide from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
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