PURIFICATION OF TAN RAI ALUMINUM HYDROXIDE WITH ACETIC ACID AND PREPARATION OF HIGH PURE NANOSIZE α-ALUMINA
Abstract
Gibbsite is the most common form of aluminum hydroxide (AH) as commercial product of Bayer process. However, it usually contains some impurities such as sodium, iron, calcium, and silicon compounds that may not meet requirements for preparation of advanced materials or functional ones which need very high pure raw materials. In this paper, we present some results on the purification of commercial AH from Tan-rai alumina company (Vietnam) using dilute acetic acid solution. The removal yields of 93.19, 91.75, 100, and 86.03% are obtained for Na2O, CaO, Fe2O3, and SiO2 respectively, whereas the recovery of clean AH is almost quantitative. The clean AH is then used for preparation of high pure nanosize α-alumina via chemical processes of dissolution, precipitation ammonium aluminium carbonate hydroxide (AACH) with ammonium carbonate solution. After washing the excess reagents, the precipitate of AACH is then decomposed at elevated temperature to get high pure nanosize α-alumina. The obtained product rather regular and most of particles are not agglomerated. The laser scattering data on the prepared sample show that the particle sizes of the prepared α-alumina from 60 – 90 nm are obtained which are in good agreement with the data from XRD and morphology measurements. The α-alumina structure of the final product is confirmed by the XRD measurement data.
For citation:
Huynh Thu Suong, La The Vinh, Nguyen Quang Bac Purification of Tan Rai aluminum hydroxide with acetic acid and preparation of high pure nanosize α-alumina. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2022. V. 65. N 12. P. 53-58. DOI: 10.6060/ivkkt.20226512.6676.
References
Fu X. F., Xu B.J., Huang C.J. Preparation of high purity alumina technology overview. Adv. Mater. Res. 2013. 734-737. P. 2496. DOI: 10.4028/www.scientific.net/AMR.734-737.2496.
Ambaryan G.N., Vlaskin M.S., Buryakovskaya O.A., Kislenko S.A., Zhuk A.Z., Shkolnikov E.I., Arnautov A.N., Zmanovsky S.V., Osipenkova A.A., Tarasov V.P., Gromov A.A. Advanced manufacturing process of ultra-high-purity α-Al2O3. Sustainable Mater. Technol. 2018. 17. P. e00065. DOI: 10.1016/j.susmat.2018.e00065.
Wang X., Yang Y., Ma A., Nie J., Liu Z., Wang J., Zhao J. Review of impurity removal methods in the preparation of high purity alumina with aluminum alkoxide hydrolysis of aluminum alkoxide hydrolysis technology. Acta Petro-lei Sinica (Petrol. Proc. Sect.). 2020. 36. P. 629-638.
Peppera R.A., Perenlei G., Martens W.N., Couperthwaite S.J. High purity alumina synthesised from iron rich clay through a novel and selective hybrid ammonium alum process. Hydrometallurgy. 2021. 204. P. 105728. DOI: 10.1016/j.hydromet.2021.105728.
Dobra G., Iliev S., Cotet L., Boiangiu A., Hulka Iosif, Kim L, Catrina G.A., Filipescu L. Heavy metals as impu-rities in the bayer production cycle of the aluminum hydroxide from sierra leone bauxite. preliminary study. J. Siber. Fed. Univ. Eng.Technol. 2021. 14. P. 151-165. DOI: 10.17516/1999-494X-0296.
Kozerozhets I.V., Panasyuk G.P., Semenov E.A., Av-deeva V.V., Ivakin Y.D., Danchevskaya M.N. New ap-proach to prepare the highly pure ceramic precursor for the sapphire synthesis. Ceram. Internat. 2020. 46. P. 28961-28968. DOI: 10.1016/j.ceramint.2020.08.067.
Smith P., Power G. High Purity Alumina – Current and Future Production. Mineral Proc. Extract. Metallurgy Rev. 2022. 43. P. 747-756. DOI: 10.1080/08827508.2021.1937150.
Khishigbayar K.-E., Moon Y.-G., Bae E.J., Shim K.B., Kim C.J. Impurity control with the precise measurement of alumina powders synthesized by hydrolysis method. J. Ceramic Proc. Res. 2013, 14, 168-171.
Shen H., Gao L., Ma F., Rao B., Jiang P., Gao G., Peng K. Aluminum–iron separation in high-acid leaching solu-tion and high-purity alumina preparation. Asia-Pacific J. Chem. Eng. 2021. 16. P. e2623. DOI: 10.1002/apj.2623.
Liu Q., Zhong C., Fang H., Xue J. High Purity Alumina Powders Extracted from Aluminum Dross by the Calcin-ing—Leaching Process. Light Metals. 2011. P. 197–200. DOI: 10.1002/9781118061992.ch34.
Park N.-K., Choi, H.-Y., Kim D.-H., Lee T. J., Kang M., Lee W. G., Kim H. D., Park J. W. Purification of Al(OH)3 synthesized by Bayer process for preparation of high purity alumina as sapphire raw material. J. Crystal Growth. 2013. 373. P. 88. DOI: 10.1016/j.jcrysgro.2012.12.004.
Choi H.Y., Kim D.H., Park N.-K., Lee T.J., Kang M., Lee W.G., Kim H.D., Park J.W. Removal of sodium contained in Al(OH)3 synthesized by Bayer process. Clean Technol. 2012. 18. P. 63. DOI: 10.7464/ksct.2012.18.1.063.
Saud A.N., Majdi H.S., Saud S.N. Synthesis of nano-alumina powder via recrystallization of ammonium alum. Cerâmica. 2019. 65. P. 236. DOI: 10.1590/0366-69132019653742636.
O Y.-T., Kim S.-W., Shin D.-C. Fabrication and synthesis of α-alumina nanopowders by thermal decomposition of ammonium aluminum carbonate hydroxide (AACH). Colloids Surf. A: Physicochem. Eng. Asp. 2008. 313–314. P. 415. DOI: 10.1016/j.colsurfa.2007.04.123.
Shin D.C., Park S.S., Kim J.H., Hong S.S., Park J.M., Lee S.H., Kim D.S., Lee G.D. Study on α-alumina precursors prepared using different ammonium salt precipitants. J. Ind. Eng. Chem. 2014. 20. P. 1269. DOI: 10.1016/j.jiec.2013.07.003.
Levin G.E., Vinogradova L.A., Iksanov F.R., Agapov E.A. Influence of the type and size of grinding media on the properties of reactive alumina for refractory concrete. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2022. V. 65. N 9. P. 105-111. DOI: 10.6060/ivkkt.20226509.6693.
Osipov D.A., Zhukov V.P., Mizonov V.E., Ogurtsov A.V. Computational and experimental study of joint grinding of dissimilar components in a circulating fluidized bed jet mill. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2019. V. 62. N 1. P. 98-106 (in Russian). DOI: 10.6060/ivkkt.20196201.5813.
Sokolov I.E., Fomichev V.V., Zakalyukin R.M., Kopylova E.V., Kumskov A.S., Mozhchil R.N., Ionov A.M. Synthesis of nanosized zirconium dioxide, cobalt oxide and related phases in supercritical CO2 fluid. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2021. V. 64. N 5. P. 35-43. DOI: 10.6060/ivkkt.20216405.6060.
