ITOスクラップからの有価金属の回収方法 - jx Nippon Mining & Metals Co., Ltd.

Title:

ITOスクラップからの有価金属の回収方法

Document Type and Number:

Japanese Patent JP4647695

Kind Code:

B2

Abstract:

Proposed is a method for collecting valuable metal from an ITO scrap by subjecting the ITO scrap to electrolysis and collecting the result as metallic indium. Specifically, the present invention proposes a method for selectively collecting metallic indium including the steps of subjecting the ITO scrap to electrolysis in an electrolytic bath partitioned with a diaphragm or an ion-exchange membrane, subsequently extracting anolyte temporarily, eliminating tin contained in the anolyte by a neutralization method, a replacement method or other methods, placing a solution from which the tin was eliminated in a cathode side again and performing electrolysis thereto; or a method for collecting valuable metal from an ITO scrap including the steps of obtaining a solution of In or Sn in an ITO electrolytic bath, eliminating the Sn in the solution, and collecting In in the collecting bath. These methods enable the efficient collection of metallic indium 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.

Inventors:

Yuichiro Shindo
Koichi Takemoto

Application Number:

JP2008542003A

Publication Date:

March 09, 2011

Filing Date:

June 27, 2007

Export Citation:

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