Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (8): 1102-1106.DOI: 10.12068/j.issn.1005-3026.2017.08.009

• Materials & Metallurgy • Previous Articles     Next Articles

Preparation of High Purity Al(OH)3from the Sulfating Solution of Potash Feldspar Roasting Residue

LIU Jia-nan1,2, HUANG Jian-di2, WU Yan 1, ZHAI Yu-chun1   

  1. 1. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. School of Chemistry & Chemical Engineering, Bohai University, Jinzhou 121013, China.
  • Received:2016-02-29 Revised:2016-02-29 Online:2017-08-15 Published:2017-08-12
  • Contact: LIU Jia-nan
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Abstract: Employing the sulfating solution of potash feldspar roasting residue as raw materials and Na2CO3 solution as precipitator, the high purity Al(OH)3 was prepared. The effects of the pH value at the end of precipitating Al, reaction temperature, aging time and the mass concentration of Na2CO3 solution on the precipitation rate of Al were investigated. Al(OH)3 powder was characterized by chemical component analysis, X-ray diffraction(XRD), scanning election microscope(SEM), and Fourier transform infrared spectroscopy (FTIR). The optimum technological conditions, which could guarantee the precipitation rate of Al more than 99%,were to keep reaction temperature at 50℃, add the Na2CO3 solution with the mass concentration of 300g/L into Al2(SO4)3 solution, control the pH value at 4.8 and the aging time for 40min. The features for the produced Al(OH)3 powder were that the crystal was amorphous, the particles were homogeneous with rough surface and the particles agglomeration occurred.

Key words: potash feldspar roasting residue;sulfating solution, Na2CO3 solution, hydrolysis method, high purity Al(OH)3

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