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.
|Título traduzido da contribuição||Method of producing scandium concentrate: patent of invention|
|Número de patente||2731951|
|IPC||C22B 59/00,C22B 60/02,C22B 3/24|
|Data da prioridade||28/11/2018|
|Data de arquivo||28/11/2018|
|Estado da publicação||Published - 9 set 2020|