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论文类型：期刊论文
发表时间：2012-01-01
发表刊物：OIL SHALE
收录刊物：SCIE、Scopus
卷号：29
期号：1
页面范围：36-50
ISSN号：0208-189X
摘要：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 degrees C, activation time is 1 h, 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 degrees C 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 degrees C 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 gamma- Al2O3 with particle diameters in the range of 0.6-0.9 mu m, and its degree of purity is 98.7%.