MSCE  Vol.1 No.5 , October 2013
Influence of the Precipitating Reagents and Dispersants on the Formation Nano-Aluminum Hydroxide
ABSTRACT
The influence of the precipitating reagents and dispersants on the formation of nano-aluminum hydroxide from sodium aluminate solution by chemical precipitation was investigated. The influence of the dispersed seeds on the decomposi-tion process was investigated too. The alkaline aluminate solutions were used as original solutions with a concentration of Al2O3 having 14.78 g/dm3, αk—1.6 and127 g/dm3, αk—1.6. For the precipitation processes there were used follow-ing precipitating reagents—solutions HCl, NaHCO3 and NH4HCO3 with a concentration of 80 g/dm3, dispersants—PEG 6000, (NaPO3)6 and Tween 20. For the decomposition process the dispersed seeds and factories seeds were used. Structural studies of the aluminum hydroxide particles were carried out by means of the electron-probe microanalysis and scanning electron microscopy, and phase composition of products was determined by means of X-ray diffraction analysis. Ammonium bicarbonate and Tween 20 were determined as the optimal precipitating reagent and dispersant, correspondingly, resulting in dispersed aluminum hydroxide, which is used as a seed in the decomposition process. It was established that this product in form of dispersed seed considerably reduces the duration of the decomposition process; the maximal decomposition of solution (73.9%) was observed after injection of dispersеd aluminum hydroxide into solution. The final aluminum hydroxide having 90% of particles less than 100 nanometers was obtained within 7 hours of steady decreasing temperature from 70°C to 48°C.

Cite this paper
Sarsenbay, G. , Myltykbaeva, L. , Abdulwalyev, R. and Sukurov, B. (2013) Influence of the Precipitating Reagents and Dispersants on the Formation Nano-Aluminum Hydroxide. Journal of Materials Science and Chemical Engineering, 1, 11-15. doi: 10.4236/msce.2013.15003.
References
[1]   V. V. Ivanov, “Nanopowders Are Needed and Demanded for Modern Market,” Russian Nanotechnology, Vol. 4, No. 1, 2009, pp. 22-26.

[2]   M. V. Alfimov, “The Immediate Prospects of Nanotechnology,” Russian Nanotechnology, Vol. 3, No. 5-6, 2008. pp. 1-2.

[3]   P. A. Storozenko, “Nanopowders—Technology the Present Time,” Russian Nanotechnology, Vol. 4, No. 1-2, 2009, pp. 10-15.

[4]   O. V. Almyasheva, E. N. Korytkova and A. V. Maslov, “Preparation of Aluminum Oxide Nanocrystals under Hydrothermal Conditions,” Inorganic Materials, Vol. 41, No. 5, 2005, pp. 460-467. http://dx.doi.org/10.1007/s10789-005-0152-7

[5]   G. P. Panasiuc, V. N. Belan and I. L. Inroshilov, “The Change of Hydrargillite-Boehmite,” Inorganic Materials, Vol. 46, No. 5, 2010, pp. 831-837.

[6]   A. T. Ibragimov and S. V. Budon, “The Development of Technology of Production of Alumina from Bauxite Kazakhstan,” Pavlodar, 2010, p. 304.

[7]   G. Sarsenbay, L. A. Myltykbaev, R. A. Abdulwalyev and S. B. Satylganova, “Develop Nanotechnology Alumina Production Will Promote the Economy of Kazakhstan,” Industry of Kazakhstan, No. 8, 2012, pp. 48-51.

[8]   G. Sarsenbay, L. A. Myltykbaev, R. A. Abdulwalyev and S. B. Satylganova, “Influence of the Precipitation Reagent on the Formation of Nanoparticles Aluminum Hydroxide,” Comprehensive Utilization of Mineral Resources, No. 4, 2012, pp. 20-25.

[9]   Y. C. Zhang, S. O. Chen, et al., “Investigation of the Agglomeration Nano Alumina by Chemical Precipitating Process,” Materials Review, Vol. 21, No. VΙΙΙ, 2007, pp. 44-46,53.

 
 
Top