发明名称 |
METHOD FOR LEACHING VALUABLE METALS CONTAINED IN WASTE DENITRIFICATION CATALYST BY USING ROASTING AND WATER LEACHING |
摘要 |
<p>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 (NaVO 3 ) and sodium tungstate (Na 2 WO 4 ); and (c) injecting the roasting product into water to water leach sodium vanadate and sodium tungstate in the form of a vanadate ion (VO 3 - ) and a tungstate ion (WO 4 2- ).</p> |
申请公布号 |
EP2894233(A1) |
申请公布日期 |
2015.07.15 |
申请号 |
EP20130834863 |
申请日期 |
2013.01.18 |
申请人 |
KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES |
发明人 |
LEE, JIN-YOUNG;KIM, JOON-SOO;KUMAR, RAJESH |
分类号 |
C22B34/22;C22B1/00;C22B3/12;C22B7/00;C22B34/36 |
主分类号 |
C22B34/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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