Abstract
To increase the precipitation rate significantly and obtain sandy alumina, a two-stage seeded precipitation process for preparing coarse boehmite was studied. In the first stage, which involved gibbsite precipitation, the fresh fine gibbsite, along with the active seed of less than 20 g L−1, acted as seed. An estimated 70% precipitation rate was achieved in the concentrated sodium aluminate solution at 45°C for ~20 h. In the second stage, which involved boehmite precipitation, the fine gibbsite played a dual function in dissolution and as seed. After gibbsite was dissolved into the solution and boehmite was precipitated, uniform coarse boehmite was precipitated from sodium aluminate solution at 95°C for ~20 h. Extending the duration and adding boehmite as seed benefitted the formation of coarse boehmite and the transformation of gibbsite into boehmite. Finally, a precipitation process that remarkably increased the precipitation rate was presented.
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References
I. Seyssiecq, S. Veesler, G. Pèpe, and R. Boistelle, J. Cryst. Growth 196, 174 (1999).
Y. Li, Y. Zhang, C. Yang, and Y. Zhang, Hydrometallurgy 98, 52 (2009).
Y. Zhang, S. Zheng, H. Du, H. Xu, S. Wang, and Y. Zhang, Hydrometallurgy 98, 38 (2009).
Y. Zhang, S. Zheng, X. Wang, H. Du, Z.Z. Fang, and Y. Zhang, Hydrometallurgy 154, 47 (2015).
Y. Li, Q. Chen, S. Wang, Z. Yi, and P. Zhang, Trans. Nonferrous Metals Soc. China 18, 974 (2008).
C. Skoufadis, D. Panias, and I. Paspaliaris, Hydrometallurgy 68, 57 (2003).
B. Dash, B.C. Tripathy, I.N. Bhattacharya, S.C. Das, C.R. Mishra, and B.K. Mishra, Hydrometallurgy 95, 297 (2009).
B. Dash, B.C. Tripathy, I.N. Bhattacharya, and B.K. Mishra, Dalton Trans. 39, 9108 (2010).
H.L. Watts and D.W. Utley, Anal. Chem. 25, 864 (1953).
Y. Zhang, S. Zheng, H. Du, H. Xu, S. Wang, and Y. Zhang, Hydrometallurgy 98, 38 (2009).
G.H. Chen, Q.Y. Chen, Z.L. Yin, and Z.M. Yin, Trans. Nonferrous Metals Soc. China 16, 483 (2006).
S. Kenich, K. Mikio, and M. Kenyo, Light Metals 1976, 149 (1976).
B. Dash, B.C. Tripathy, I.N. Bhattacharya, S.C. Das, C.R. Mishra, and B.S. Panias, Hydrometallurgy 88, 121 (2007).
Q.S. Zhou, D.J. Peng, Z.H. Peng, G.H. Liu, and X.B. Li, Hydrometallurgy 99, 163 (2009).
D. Panias, P. Asimidis, and I. Paspaliaris, Hydrometallurgy 59, 15 (2001).
Acknowledgements
This work was supported by the National Science Foundation of China (Grant 51274242), National Key Technology R&D Program of China (Grant 2015BAB04B01), and the Fundamental Research Funds for the Central Universities of Central South University (Grant 2016zzts038).
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Liu, G., Li, Z., Qi, T. et al. Two-Stage Process for Precipitating Coarse Boehmite from Sodium Aluminate Solution. JOM 69, 1888–1893 (2017). https://doi.org/10.1007/s11837-017-2468-6
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DOI: https://doi.org/10.1007/s11837-017-2468-6