Extraction of γ-Alumina from Low-Cost Kaolin

Author:

Ibrahim Khalil,Moumani Mohammad,Mohammad Salsabeela

Abstract

A combined process is proposed for the utilization of local kaolin to produce alumina particles. The applied process is made in two stages: calcination at 700 °C with sodium chloride and leaching with sulfuric followed by hydrochloric acids. The optimal extraction efficiency can be obtained when the conditions are as follows: leaching temperature is at 140 °C, leaching time is 3 h 45 min and concentration of sulfuric acid is 40 wt.%. The results show that the purity of alumina reaches 79.28%, which is suitable for the production of aluminum metal. It is evident that this method of extraction of alumina from the kaolin ash is practical and feasible. The structural and morphological properties of the calcined microcrystalline powder was characterized by X-ray diffraction and scanning electron microscope (SEM).

Publisher

MDPI AG

Subject

Management, Monitoring, Policy and Law,Nature and Landscape Conservation

Cited by 18 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Treatment of landfill leachate using kaolin-alumina membranes: a focus on performance evaluation;Emergent Materials;2024-04-12

2. SYNTHESIS OF ALUMINA FROM KAOLIN FOUND IN AJEBO, OGUN STATE, NIGERIA;Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering;2024-03-28

3. Kinetics of Owhe kaolinite leaching for alumina recovery in hydrochloric acid solution;Scientific African;2024-03

4. Synthesis of Surface-Active Aluminium Oxide from Kaolin Clay for Industrial Applications;2023 2nd International Conference on Multidisciplinary Engineering and Applied Science (ICMEAS);2023-11-01

5. Pressure leaching of aluminum from kaolin by HCl: Experimental and DFT study;Hydrometallurgy;2023-08

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