Preparation of Alumina From Retorting Residue of Oil Shale

Abstract

In this research, the leaching and preparation of Al 2 O 3 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-Al 2 O 3 with particle diameters in the range of 0.6-0.9 µm, and its degree of purity is 98.7%.

Modification of Ntezi Bentonite Structure by Hydrochloric Acid: Process Kinetics and Structural Properties of the Modified Samples

“…The increase in removal rate of the cations could be as a result of high kinetic energy in the system which speeds up the rate of reaction on the surface of the clay. The same trend was reported by others (Numluk and Chaisena, 2012;Xu et al, 2012;Philips and Wills, 1982). Fourier transforms infrared (FTIR) spectroscopy analysis.…”

Characteristics of Shale Gas Reservoir in Jiyang Depression and its Significance in Drilling and Exploitation

“…The stability of formation can be divided into four ranks according to the value of SSI: high stability (SSI>90 mm), moderate stability (SSI=60~90 mm), low stability (SSI=30~60 mm), weak stability (SSI <30 mm). SSI of shale samples, with an average of 19.99 mm (<30mm), showed shale formation of Shahejie group in Jiyang depression has poor stability [13].…”