Author(s)

Seyed Ali Hosseini, Aligholi Niaei, Dariush Salari

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Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.

The paper reports a process for synthesis of γ-alumina from kaolin. Kaolin was transformed to meta-kaolin by calcination at 800^oC for 2h. γ-alumina powder was synthesized through extracting alumina from meta- kaolin via H₂SO₄ and meta-kaolin reactions and consequently precipitation in ethanol, which led to form the aluminum sulfate. The precipitated aluminum sulfate was dried and calcined at 900 ^oC for 2h, which resulted the formation of γ-alumina. The structure of γ-alumina was confirmed by XRD and FTIR and the mean particles size of γ-alumina was determined by SEM to be 0.5 - 0.9 µm. The study revealed the kaolin could be promising material for preparation of γ-alumina.

Kaolin, γ-Alumina, Aluminum Sulfate, Calcination

S. Hosseini, A. Niaei and D. Salari, "Production of γ-Al₂O₃ from Kaolin," Open Journal of Physical Chemistry, Vol. 1 No. 2, 2011, pp. 23-27. doi: 10.4236/ojpc.2011.12004.