SUBSTANCE: invention relates to a technology of extracting scandium from man-made and productive scandium containing solutions produced after extraction of uranium during its production by the method of underground leaching. Method involves sorption of scandium from a scandium-bearing solution on a solid extractant with high selectivity by scandium (SOLEX). Scandium-bearing product solution acidity is brought to pH=1÷2. Before re-extraction the SOLEX is washed with a solution ofsulphuric acid with the concentration of 50–200 g/dm3 . Re-extraction is performed with a re-extraction suspension formed by mixing a solution of hydrofluoric acid and a coprecipitator in the form of a freshly prepared solution of calcium fluoride. Herewith the saturated by scandium after re-extraction suspension is filtered to produce a concentrate of scandium, and the filtrate is additionally saturated by hydrofluoric acid and by the coprecipitator to produce a re-extraction suspension, which is repeatedly directed to re-extraction, and the SOLEX after re-extraction is returned for extraction of scandium.
EFFECT: technical result is production of cleaner concentrate of scandium.
|Translated title of the contribution||METHOD OF EXTRACTING SCANDIUM FROM SCANDIUM-BEARING PRODUCT SOLUTION: patent of invention|
|IPC||C22B 59/00,C22B 3/24|
|Publication status||Published - 2 Mar 2017|