METHOD TO EXTRACT HOLMIUM (III) CATIONS FROM NITRATE SOLUTIONS

摘要

FIELD: metallurgy. ^ SUBSTANCE: method to extract holmium (III) cations from nitrate solutions includes ion floatation using an anion-type surfactant as a collector. Besides, the collector is dodecyl sodium sulfate in a concentration corresponding to stoichiometry of the following reaction: Ho+3+3C12H25OSO3Na=Ho[C12H25OSO3]3+3Na+, where Ho+3 - holmium cation, C12H25OSO3Na - sodium dodecyl sulfate. Moreover, ion floatation is carried out at pH=6.6-7.4, which makes it possible to achieve 90% extraction of holmium from aqueous solutions of its salts. ^ EFFECT: higher extent of holmium extraction. ^ 1 dwg, 1 tbl, 1 ex