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http://dx.doi.org/10.7844/kirr.2019.28.1.15

Production of Alumina with High Purity  

Song, Si Jeong (Department of Advanced Materials Science & Engineering, Mokpo National University)
Lee, Man Seung (Department of Advanced Materials Science & Engineering, Mokpo National University)
Publication Information
Resources Recycling / v.28, no.1, 2019 , pp. 15-22 More about this Journal
Abstract
There are three hydrometallurgical methods by which pure alumina can be prepared, such as hydrolysis of aluminum alkoxides, thermal decomposition of ammonium alum and thermal cracking of ammonium aluminum carbonate (AACH). The effect of solution pH and temperature and the nature of the impurities on the phase transition and the purity of the alumina thus produced was investigated. Hydrolysis of aluminum alkoxides and thermal decomposition of ammonium alum produce ${\alpha}$ and ${\gamma}$ alumina, while only ${\alpha}$ alumina can be produced by thermal cracking of AACH.
Keywords
pure alumina; alkoxide; ammonium alum; ammonium aluminum carbonate;
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Times Cited By KSCI : 4  (Citation Analysis)
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