METHOD OF RE-EXTRACTION OF VANADIUM FROM THE ORGANIC SOLUTION CONTAINING ITS SALTS WITH THE DI-2-ETHYLHEXYLPHOSPHORIC ACID

摘要

FIELD: chemical industry; nuclear power engineering; methods of re-extraction of vanadium from the organic solution containing its salts with the di-2-ethylhexylphosphoric acid.;SUBSTANCE: the invention is pertaining to the method of re-extraction of vanadium from the organic solution containing its salts with the di-2-ethylhexylphosphoric acid. The invention is dealt with the method of the radiochemical reprocessing of the constructional materials of the thermonuclear reactor on the basis of the vanadium-chromium-titanium alloy with the purpose of extraction of vanadium from the organic solutions containing its salts with di-2- ethylhexylphosphoric acid. The re-extraction of vanadium from such solutions is exercised with the help of the nitric acid solutions at the acid concentration of no more than 0.5 mole per liter, containing hydrogen peroxide in amount of no less than 2.5 mole per one mole of vanadium. The technical result of the invention is the decreased duration of the process of the vanadium re-extraction with its simultaneous purification from the rare-earth elements.;EFFECT: the invention ensures the decreased duration of the process of the vanadium re-extraction with its simultaneous purification from the rare-earth elements.;2 tbl, 2 ex