METHOD OF PRODUCING SCANDIUM CONCENTRATE Russian patent published in 2020 - IPC C22B59/00 C22B60/02 C22B3/24 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of associated extraction of scandium from productive solutions formed during processing of rare-earth ores containing scandium. To obtain scandium concentrate from scandium-containing solution, scandium is sorbed from scandium-containing solution on phosphorus-containing ionite, saturated phosphorus-containing ionite is washed, desorption of scandium from saturated phosphorus-containing ionite with sodium carbonate solution to obtain desorbed ionite, which is fed for repeated sorption of scandium and desorption solution, which is pre-acidified with subsequent precipitation of scandium concentrate by treatment with sodium hydroxide or ammonia. Prior to washing, desorption of thorium containing in scandium-containing solution is carried out with solution of oxyethyl diphosphonic acid with concentration of 50–100 g/dm³.

EFFECT: method increases purity of scandium concentrate.

1 cl, 1 tbl, 1 ex