Title:
有用金属のリサイクル方法
Document Type and Number:
Japanese Patent JP5403814
Kind Code:
B2
Abstract:
A method of recycling useful metals is provided. The method enables useful metals including indium, zinc, yttrium, europium, lanthanum, terbium, gadolinium, antimony, lead, copper, tin, and silver to be recovered from wastes, such as wasted flat panel displays, and recycled economical with small energy consumption. The method of recycling useful metals includes: a step in which wastes comprising various flat panel displays, e.g., liquid-crystal display panels, are crushed/powdered; a step in which the resultant particles are dissolved in an aqueous hydrofluoric acid solution; and a step in which various metal oxides and various metal fluorides which remain undissolved are filtered off and the aqueous hydrofluoric acid solution containing various metal ions is electrolyzed to deposit and recover metals for transparent-electrode oxides, such as indium and zinc, and other useful metals.
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Inventors:
Tetsuya Homma
Masayuki Ikuzawa
Tomoyuki Furuyama
森角 Akihiro
Tanaka 薫平
Masayuki Ikuzawa
Tomoyuki Furuyama
森角 Akihiro
Tanaka 薫平
Application Number:
JP2009548885A
Publication Date:
January 29, 2014
Filing Date:
December 25, 2008
Export Citation:
Assignee:
Educational foundation Shibaura Institute of Technology
International Classes:
C02F1/62; B09B3/00; C22B3/04; C22B7/00; C22B11/00; C22B13/00; C22B15/00; C22B19/20; C22B19/30; C22B25/00; C22B25/06; C22B30/02; C22B58/00; C22B59/00; C25C7/06
Domestic Patent References:
| JP2007270311A | 2007-10-18 | |||
| JP2005334838A | 2005-12-08 | |||
| JP2000203841A | 2000-07-25 | |||
| JPH11192475A | 1999-07-21 | |||
| JPH07508927A | 1995-10-05 |
Attorney, Agent or Firm:
Ichiro Kudo