Method of obtaining gallium from aluminate solution by electrolysis


Journal Article

Gallium is an increasingly important material in the fields of semiconductors and energy transfer. A prime source of gallium is the aluminate solution that remains after the purification of bauxite. The authors have sought a way of reclaiming gallium economically by electrolysis of a laboratory aluminate solution without having to use a cathode of mercury – an environmental pollutant. Cathodes of copper, indium, 70In–30Ga, Wood's alloy, and mercury (for comparison) were used with a wide range of anodes. The study accounted for the effects of electrode material, temperature, current density, and initial gallium concentration on the yield, energy consumption, and utilization of both current and electrode. The best results were obtained with indium or In–Ga cathodes and with platinum, Pt–Ti, or stainless steel anodes, at 75°C and a current density of ∼100 Am−2. Electrolysis was more efficient the higher the gallium concentration, demonstrating that commercial–scale electrolysis of aluminate solution is unlikely to be economically viable without prior concentration of gallium. © 1986 The Institute of Metals.

Full Text

Duke Authors

Cited Authors

  • Jelačić, ; Barišin, D; Batinić-Haberle, I

Published Date

  • January 1, 1986

Published In

Volume / Issue

  • 2 / 4

Start / End Page

  • 416 - 419

Electronic International Standard Serial Number (EISSN)

  • 1743-2847

International Standard Serial Number (ISSN)

  • 0267-0836

Digital Object Identifier (DOI)

  • 10.1179/mst.1986.2.4.416

Citation Source

  • Scopus