METHOD FOR LEACHING VALUABLE METALS CONTAINED IN WASTE DENITRIFICATION CATALYST BY USING ROASTING AND WATER LEACHING

Title:

METHOD FOR LEACHING VALUABLE METALS CONTAINED IN WASTE DENITRIFICATION CATALYST BY USING ROASTING AND WATER LEACHING

Document Type and Number:

WIPO Patent Application WO/2014/038762

Kind Code:

A1

Abstract:

Disclosed is a method for effectively leaching valuable metals such as vanadium and tungsten contained in a waste denitrification catalyst by using roasting and water leaching. According to the present invention, the method for leaching valuable metals contained in a waste denitrification catalyst comprises the steps of: (a) mixing a waste denitrification catalyst containing vanadium (V) and tungsten (W) in the form of an oxide with an alkali metal compound to form a mixture; (b) roasting the mixture to generate a roasting product comprising sodium vanadate (NaVO3) and sodium tungstate (Na2WO4); and (c) injecting the roasting product into water to water leach sodium vanadate and sodium tungstate in the form of a vanadate ion (VO3-) and a tungstate ion (WO4 2-).

Inventors:

LEE JIN-YOUNG (KR)
KIM JOON-SOO (KR)
KUMAR RAJESH (KR)

Application Number:

PCT/KR2013/000421

Publication Date:

March 13, 2014

Filing Date:

January 18, 2013

Export Citation:

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Assignee:

KOREA INST GEOSCIENCE & MINERA (KR)

International Classes:

C22B34/22; C22B3/12; C22B7/00; C22B34/36

Foreign References:

KR20070033122A	2007-03-26
JP2000309828A	2000-11-07
KR20010107450A	2001-12-07
KR20040067396A	2004-07-30

Other References: