caa a22 4500 388020180 CHVBK 20180307124921.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0149 doi S0884291400043867 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0149 Optimization of the extraction of aluminum sulfate and ammonium aluminum sulfate alums from aluminum dross tailings [Elektronische Daten] Aluminum dross tailings, an industrial waste from the Egyptian Aluminium Company (Egyptalum), were used to produce two types of alums, namely, aluminum sulfate alum and ammonium aluminum alum via two separate processes. The first process involved leaching the impurities using dilute H2SO4 at different solid/liquid ratios and temperatures in the form of soluble sulfates. Some dissolved aluminum was recovered as ammonium aluminum sulfate. The second process involved extraction of aluminum sulfate from the purified dross produced after leaching. This was carried out under atmospheric pressure using different concentrations of H2SO4. Influence of temperature, time of reaction, and acid concentration on leaching and extraction processes were studied. X-ray diffraction, atomic absorption spectrometry, and thermal analysis techniques were used. Copyright © Materials Research Society 1998 Mohamed M. A. Chemistry Department, Faculty of Science, South Valley University, Qena 83511, Egypt Kassim M. E. Metallurgy Department, Faculty of Engineering, Assiut University, Assiut, Egypt El-katatny E. A. Aluminium Company of Egypt, Nag-Hammady, Egypt Journal of Materials Research Cambridge University Press 13/4(1998-04), 1075-1083 0884-2914 13:4<1075 1998 13 JMR https://doi.org/10.1557/JMR.1998.0149 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0149 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohamed M. A. Chemistry Department, Faculty of Science, South Valley University, Qena 83511, Egypt NATIONALLICENCE 700 1- Kassim M. E. Metallurgy Department, Faculty of Engineering, Assiut University, Assiut, Egypt NATIONALLICENCE 700 1- El-katatny E. A. Aluminium Company of Egypt, Nag-Hammady, Egypt NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 1075-1083 0884-2914 13:4<1075 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge