Title:
インジウムの回収・精製法
Document Type and Number:
Japanese Patent JP4277375
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for easily and safely recovering a high purity indium-contg. aq.soln. from an indium-cotaining material such as an ITO scrap in such a manner that the concn. of zirconium in indium is reduced. SOLUTION: A material contg. indium oxide is dissolved into an acidic aq. soln., and, after the control of the concn. of hydrogen ions in the dissolving soln. to the range of 0.5 to 2 mol/L, it is recovered as an indium-contg. aq.soln. by using an ion exchange resin to reduce the concn. of zirconium in the recovered indium. The material contg. indium oxide is desirably composed of an ITO oxide scrap. Moreover, the ITO powder uses an indium-contg. aq.soln. in which the concn. of zirconium to the obtd. indium is <=40 ppm as the raw material.
Inventors:
Takeshi Hattori
Yoshinari Sawabe
Shinji Fujiwara
Kunio Saegusa
Yoshinari Sawabe
Shinji Fujiwara
Kunio Saegusa
Application Number:
JP21523399A
Publication Date:
June 10, 2009
Filing Date:
July 29, 1999
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C01G15/00; C22B58/00; C22B3/42; C22B7/00
Domestic Patent References:
| JP3082720A | ||||
| JP3075224A |
Attorney, Agent or Firm:
Toru Nakayama