METHOD OF PRODUCING GALLIUM FROM ALKALINE-ALUMINATE SOLUTIONS OF ALUMINIUM PRODUCTION Russian patent published in 2017 - IPC C22B58/00 C25C1/22 

FIELD: chemistry.

SUBSTANCE: method is proposed of producing gallium from alkaline-aluminate solutions of alumina production, including preparation of the initial mixture from the mother liquor and circulating solutions with the introduction of a zinc solution, and four-stage electrolysis. Herewith an additional fifth electrolysis step is carried out using as an electrolyte a solution produced by dissolving slag after gallium carburizing on ammonium gallium in sodium hydroxide at a cathode current density of less than 50 A/m² and a volumetric current density of not more than 3 kA/m³ at a temperature of 50-60°C for 5-6 hours, followed by its supply to the second stage of electrolysis.

EFFECT: increasing the specific productivity of the process along with an increase in the purity of commodity gallium due to the removal of impurities of heavy metals and a more complete purification of the initial solutions.

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