ESTONIAN ACADEMY
PUBLISHERS
eesti teaduste
akadeemia kirjastus
PUBLISHED
SINCE 1984
 
Oil Shale cover
Oil Shale
ISSN 1736-7492 (Electronic)
ISSN 0208-189X (Print)
Impact Factor (2020): 0.934

PREPARATION OF ALUMINA FROM RETORTING RESIDUE OF OIL SHALE; pp. 36–50

Full article in PDF format | doi: 10.3176/oil.2012.1.04

Authors
Y.-M. XU, D.-M. HE, J.-W. SHI, J. GUAN, Q.-M. ZHANG

Abstract

In this research, the leaching and preparation of Al2O3 from retorting residue of Fushun east open-pit oil shale in China were investigated. The optimum acid leaching conditions are the following: activation temperature is 850 ºC, activation time is 1h, the particle size of the raw material is 0.074mm, the concentration of acid is 12%, the liquid to solid ratio is 5:1, reaction tem­perature is 100 ºC and reaction period is 1.5 h. The homogeneous chemical precipitation method was applied for the preparation of alumina. Optimum conditions for alumina preparation were determined and are as follows: reaction at 55 ºC for 1.5 h, the concentration of sodium meta aluminate is 0.4 mol/L, the dose of surfactant is 0.3%. The product can be effectively purified by washing with 25% acetic acid, and then characterized by laser particle size distribution, X-ray fluorescence spectrometry (XRF), X-ray dif­fraction (XRD) and scanning electron microscopy (SEM). Results prove that the product is γ- Al2O3 with particle diameters in the range of 0.6–0.9 μm, and its degree of purity is 98.7%.


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