Liquid-Liquid Extraction of Gallium from Jajarm Bayer Process Liquor Using Kelex 100

Document Type : Research Note


Department of Mining Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, I.R. IRAN


The solvent extraction of gallium from a concentrated Jajarm Bayer process liquor containing 164.90 g/l of Na2O, 86.70 g/l of Al2O3 and 106.02 ppm of gallium was investigated using 10 vol.% Kelex100, a 7-alkyl substituted-8 hydroxyquinoline as an extractant, 10 vol.% etanol as a modifier and kerosene as a diluent. At (Vo :Va = 1.0:1.0) organic to aqueous phase ratio and at room temperature, 93.39% of gallium was recovered in 60 minutes. Back extraction studies of the loaded organic phase were carried out using hydrochloric acid, sulfuric acid and sodium hydroxide. Scrubbing of aluminium co-extracted into the organic phase was carried out with 5.0 M HCl and subsequently stripping of gallium was carried out with 1.5 M HCl. The final strip liquor was found to contain 490 ppm of gallium along with 141.73 ppm of aluminium.


Main Subjects

[1] Barbara  Elvers,  Stephen Hawkins, "Ulmanns  Encyclopedia of Industrial Chemistry", Vol. A12 (1989).
[2] Kirk- Othmer,  "Encyclopedia  of  Chemical Technology", Vol. 11 (1998).
[3]  Lee, M.S., Lee, E.C., Solvent Extraction Separation of Indium and Gallium from Sulphate Solutions Using D2EHPA, Hydrometallurgy, 63, p. 269 (2002).
[4] David L. Gefvert, Dioxime Kinetic Enhancer for Solvent Extraction of Gallium from Basic Aqueous Solutions Thereof, U.S.A Patents, No. 4855114 (1989).
[5] Nicholas P. Wynn, Method of Liquid-Liquid Extraction of Gallium from a Basic Aqueous Solution, US  Patents, No. 4587111 (1986).
[6] Yvette Pescher, Recovery of Gallium Values from Basic Aqueous Aolutions Thereof, U.S.A patents, No.5204074 (1993).
[7] Puvvada, G.V.K., Liquid-Liquid Extraction of Gallium from Bayer Process Liquor Using Kelex100 in the Presence of Surfactants, Hydrometallurgy, 52 (1998).
[8] Puvvada, G.V.K., Chandrasekher, K., Solvent Extraction of Gallium from an Indian Bayer Process Liquor Using Kelex100, Minerals Engineering, 9 (1996).