PREPARATION OF NANOGAMA ALUMINA  FROM IRAQI KAOLIN

M. Kshash, Jassim; Baha,; A. Sabbar, A

	PREPARATION OF NANOGAMA ALUMINA FROM IRAQI KAOLIN
Iraqi Bulletin of Geology and Mining
Article 1, Volume 14, Issue 1, 2018, Pages 121-130
Authors
Jassim M. Kshash; ; a A. Sabbar
Abstract
The work reports a procedure for the synthesis of γ-alumina from the Iraqi kaolin. Kaolin was transformed to metakaolin by calcination at 750 °C for 45 minute. γ-alumina powder was synthesized through extracting alumina from metakaolin via H2SO4 treatment and precipitation by ethanol, which produces aluminum sulfate of 99% purity. The precipitated aluminum sulfate was dried and calcined at 800, 850, 900 and 1000 °C to study the thermal decomposition of aluminum sulfate. The crystallinity and phase of the synthesized for the assignment of calcined samples was characterized by X-ray diffraction measurements, paving the temperature at which the aluminum sulfate is converted to γ-alumina nano particles. Pure alumina nanoparticle 98.81% was prepared by calcination of aluminum sulfate at 1000 °C for 2 hour. The specific surface area, pore volume and pore size for γ-alumina nano particles were determined by BET measurement i.e. 117 m2/gm, 1.1 cm3/g and 337.6 Å respectively. The size of the particles obtained were also calculated from BET analysis to be around 13 nm. The study revealed that the kaolin could be a promising material for the preparation of γ-alumina.
Keywords
Sargelu Formation; Basin Model; Jurassic period; Thermal burial history

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