Solvent extraction of scandium from leach solutions

摘要

#$%^&*AU2015275231A120160707.pdf#####1001317876 ABSTRACT OF THE DISCLOSURE A method for isolating scandium values is provided. The method includes extracting 5 scandium values from a leachate with an organic solvent, thereby obtaining a scandium-loaded organic solvent, wherein the leachate contains iron and scandium ions, and wherein the organic solvent contains a primary amine. The scandium values are then stripped from the scandiumloaded solvent with a stripping solution containing an acid and a salt. .0Sheet 5 of 10 1 00.0 10 Sc-H2SO4 90CU Fe-H2SO4 80.0 Sc-HCI 70.0 -- Fe-HCI 60.0 -Sc-HNO3 --Fe-HNO3 a 50.0 40.0 30.0 4 20.0 ___ __ __ 10.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Acid concentration (M) FIG. 5