Shahrood University of Technology Journal of Mining and Environment 2251-8592 8 2 2017 04 01 Gallium extraction from Jajarm Bayer process liquor using micro-emulsions 269 276 780 10.22044/jme.2016.780 EN H. Amani Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran H. Naderi Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran Journal Article 2016 08 19 Gallium extraction from Jajarm Bayer process liquor (Jajarm, Iran) was investigated using microemulsions. Also the behavior of aluminum was studied as an impurity. Kelex100 (4-ethyl, 1-methyl, 7-octyl, 8-hydroxyquinoleine), <em>iso</em>-decanol and <em>n</em>-butanol, and kerosene were used as the surfactant, co-surfactant, and oil phase, respectively. Ternary phase diagrams were produced using various co-surfactants at different C/S ratios. The results obtained show that Winsor II is the predominant region, and the least area was obtained using <em>iso</em>-decanol at C/S = 4. Using <em>n</em>-butanol or <em>iso</em>-decanol at C/S = 2, 100% of gallium was extracted. The equations of the statistical models for the gallium and aluminum extractions using different co-surfactants were calculated. While the highest gallium extraction (100%) was obtained using <em>n</em>-butanol, due to the high co-extraction of aluminum, the lowest separation and enrichment factors were obtained for this system. The highest separation and enrichment factors were obtained using <em>iso</em>-decanol at C/S = 2. The point with the compositions of X_AF = 30, X_OF = 20, and X_C/S = 50 was found to be a suitable choice, and led to 74% and 14% extractions for gallium and aluminum, respectively. An enrichment factor of 5.28 was obtained. https://jme.shahroodut.ac.ir/article_780_928ed8b315d7ac871924016f71b1526f.pdf