METHOD TO EXTRACT GALLIUM FROM GALLIUM-CONTAINING SLIMES Russian patent published in 1995 - IPC

FIELD: electrochemical industry. SUBSTANCE: lixiviation if slime is carried out with anode dissolving under temperature of 15 20 C and electrical current density 0,02-0,05 A/cm² in anode chamber of three-chamber electrolyzer. Before electrochemical reduction of gallium formed in anode chamber solution is subjected to three-staged purification from impurities: on first stage by sorption, on second stage by electrochemical treatment in cathode chamber of first stage with cathode current density of 0,002-0,008 A/cm² and under temperature of 80 100 C, on third stage by additional sorption. Electrochemical reduction is carried out from purified solution in cathode chamber of second stage of electrolyzer with current density of 0,2-0,4 A/cm². In the case, sorption purification is carried out with usage of epoxypolyamineanionite as sorbent under temperature of 15 20 C. EFFECT: method is used in electrochemical industry. 2 cl