The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2012
Filed:
Dec. 25, 2008
Tetsuya Homma, Tokyo, JP;
Tomoyuki Ubusawa, Tokyo, JP;
Tomoyuki Furuyama, Tokyo, JP;
Akihiro Morikaku, Tokyo, JP;
Kumpei Tanaka, Tokyo, JP;
Tetsuya Homma, Tokyo, JP;
Tomoyuki Ubusawa, Tokyo, JP;
Tomoyuki Furuyama, Tokyo, JP;
Akihiro Morikaku, Tokyo, JP;
Kumpei Tanaka, Tokyo, JP;
Shibaura Institute of Technology, Tokyo, JP;
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 economically 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.