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A Study on the Removal of Minor Elements from Aluminum Hydroxide with Organic Acids  

Lee, Hwa-Young (Battery Research Center, Korea Institute of Science & Technology)
Cho, Sung-Baek (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Publication Information
Resources Recycling / v.17, no.5, 2008 , pp. 44-51 More about this Journal
Abstract
The removal of minor elements such as Na, Ca and Fe has been performed from domestic aluminum hydroxide of 99.7% purity with organic acids. Oxalic and citric acid were used as the leaching agent, respectively and aluminum hydroxides of different particle size were also employed for the purification with organic acid leaching. Fine grinding of aluminum hydroxide has been tested using ball mills and leaching characteristics of each element have also been examined in terms of leaching parameters such as temperature, acid concentration, and solid density. As a result, it was found that oxalic acid showed higher leaching efficiency than citric acid in the concentration range of 0.1 to 1.0 mole/l and leaching amount of each element was also increased with the acid concentration and reaction temperature. It was observed that about 45% of Na was leached out during ball milling process which implied that the majority of Na contained in aluminum hydroxide was water soluble compound.
Keywords
aluminum hydroxide; organic acid; leaching; high purity;
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1 Martin, E. S. and Weaver, M. L., 1993 : Synthesis and properties of high-purity alumina, American Ceramic Society Bulletin, 72, pp. 71-77
2 Corrochano, J. et al., 2008 : Whiskers of $Al_2O_3$ as reinforcement of a powder metallurgical 6061 aluminum matrix composite, Materials Letters, 62, pp. 103-105   DOI   ScienceOn
3 Cameselle, C., Nunez, M. J., and Lema, J. M., 1997 : Leaching of kaolin iron-oxides with organic acids, J. Chem. Tech. Biotechnol., 70, pp.349-354   DOI   ScienceOn
4 Valix, M., Usai, F., and Malik, R., 2001 : The electrosorption properties of nickel on Laterite gangue leached with an organic chelating acid, Minerals Engineering, 14, pp. 205-215   DOI   ScienceOn
5 이화영, 김성규, 이성오, 오종기, 2003 : Oxalic acid에 의한 장산지역 점토의 탈철에 관한 연구, 한국지구시스템공학회지, 40, pp. 309-314
6 Haber, J., Nattich, M., and Machej, T., 2008 : Alkali-metal promoted rhodium-on-alumina catalysts for nitrous oxide decomposition, Applied Catalysis, 77, pp. 278-283   DOI   ScienceOn
7 Gulicovski, J. J., Cerovic, L. S., and Milonjic, S. K., 2008 : Stability of alumina suspensions in the presence of Tiron, Ceramics International, 34, pp. 23-26   DOI   ScienceOn
8 Ambikadevi, V. R. and Lalithambika, M., 2000 : Effect of organic acids on ferric iron removal from iron-stained kaolinite, Applied Clay Science, 16, pp. 133-145   DOI   ScienceOn
9 Khodadoust, A. P., Reddy, K. R., and Maturi, K., 2005 : Effect of different extraction agents on metal and organic contaminant removal from a field soil, Journal of Hazardous Materials, B117, pp. 15-24
10 Hernandez, C., Banza, A. N., and Gock, E., 2007 : Recovery of metals from Cuban nickel tailings by leaching with organic acids followed by precipitation and magnetic separation, Journal of Hazardous Materials, B139, pp. 25-30
11 Teir, S. et al., 2007 : Dissolution of natural serpentinite in mineral and organic acids, Int. J. Miner. Process., 83, pp. 36-46   DOI   ScienceOn
12 Mao, X., Shimai, S., and Wang, S., 2008 : Gelcasting of alumina foams consolidated by epoxy resin, Journal of the Europian Ceramic Society, 28, pp. 217-222   DOI   ScienceOn