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Separation of Rare Earth and Aluminium from the Dried Powder of Waste Cerium Polishing Slurry  

Yoon Ho-Sung (한국지질자원연구원, 자원활용ㆍ소재연구부)
Kim Chul-Joo (한국지질자원연구원, 자원활용ㆍ소재연구부)
Kim Sung-Don (한국지질자원연구원, 자원활용ㆍ소재연구부)
Lee Jin-Yaung (한국지질자원연구원, 자원활용ㆍ소재연구부)
Cho Sung-Wook (한국지질자원연구원, 자원활용ㆍ소재연구부)
Kim Joon-Soo (한국지질자원연구원, 자원활용ㆍ소재연구부)
Publication Information
Resources Recycling / v.12, no.5, 2003 , pp. 10-15 More about this Journal
Abstract
In this study, the separation of rare earths and aluminium from the dried powder of waste cerium polishing slurry was investigated. Since cerium oxide, 40％ of rare earths, is the most stable state in rare earth, the dissolution of cerium oxide in acid solution is not easy. Therefore the dissolution process of cerium oxide by sulfation was examined in order to increase the recovery of rare earth. The rare earths could be separated from aluminum by double salt precipitation using sodium sulfate.
Keywords
cerium polishing powder; rare earth; sulfation; double salt precipitation;
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  • Reference
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