METHOD OF GALLIUM EXTRACTION FROM ALKALINE SOLUTIONS Russian patent published in 1995 - IPC

FIELD: production of rare metals. SUBSTANCE: after gallium sorption on anionite saturated anionite is rinsed with solution at sodium oxide content 4-6 g/l for 0.5-2.0 hr. Gallium is desorbed by two steps at maintenance of pH value at the first step 1.0-2.5 at time contact of ionite with solution 0.4-0.6 parts of total desorption time. The following gallium concentration from acid eluates is carried out by sorption on ampholyte ВПК and desorption is carried out with alkaline solution by two steps at time contact of ionite with solution at the first step 0.4-0.5 parts of total desorption time. At desorption processes both sorption gallium extraction and its concentration equipment with air mixing and suspended ionite layer is used, and at the second step apparatus with solid ionite layer. EFFECT: improved method of gallium extraction. 2 cl, 7 tbl