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Title:
METHOD AND APPARATUS FOR RECOVERING COPPER OXIDE FROM COPPER-CONTAINING ACIDIC WASTE LIQUIDS
Document Type and Number:
WIPO Patent Application WO/2013/176110
Kind Code:
A1
Abstract:
The present invention pertains to a method and apparatus for removing and recovering, as copper oxide, copper from a copper-containing acidic waste liquids, which contain copper ions in high concentration, said copper-containing acidic waste liquids including renewed waste liquid from a plating bath solution for manufacturing electrolytic copper foil, and etching waste liquid produced when etching copper printed circuit boards with a cupric chloride etchant. The present invention is a method in which: copper-containing acidic waste liquid is poured into and mixed with an alkaline solution having a volume at least sufficient to neutralize the copper-containing acidic waste liquid, generating a suspension containing solids composed mainly of copper oxide; and the solids composed mainly of copper oxide are then separated from the suspension, and recovered. A solution of alkali metal carbonates is used as the alkaline solution into which the copper-containing acidic waste liquid is poured.

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Inventors:
KOBAYASHI TAKUYA (JP)
KOBAYASHI ATSUSHI (JP)
KANO KAZUNORI (JP)
SUZUKI TOSHIHIRO (JP)
Application Number:
PCT/JP2013/064039
Publication Date:
November 28, 2013
Filing Date:
May 21, 2013
Export Citation:
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Assignee:
SWING CORP (JP)
International Classes:
C01G3/02; C02F1/62; C22B3/44; C22B7/00; C22B15/00
Foreign References:
JPH0812327A1996-01-16
JP2010105912A2010-05-13
JP2004299974A2004-10-28
JPH082915A1996-01-09
JP2001253710A2001-09-18
JP2010046653A2010-03-04
JP2003260475A2003-09-16
Other References:
HIDEMI NAWAFUNE ET AL.: "Gando Haisui kara no Malachite Seisei ni Oyobosu Chinden Joken no Eikyo", THE JOURNAL OF THE METAL FINISHING SOCIETY OF JAPAN, vol. 30, no. 2, 1979, pages 100 - 102
Attorney, Agent or Firm:
WATANABE, Isamu et al. (JP)
Isamu Watanabe (JP)
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