Materials, methods and techniques for the selective extraction of cerium from rare earth sulfates solutions

Abstract

Mixed rare earth sulfate solutions depleted of cerium may be prepared by mixing a mixed rare earth sulfate solution with a pH adjusting agent comprising a magnesium oxide, and adding a sulfate adjusting agent comprising magnesium sulfate to the mixed rare earth sulfate solution, thereby generating a mixture; adding an oxidizing agent to the mixture thereby generating a slurry comprising insoluble cerium (IV) hydroxide, the oxidizing agent comprising hydrogen peroxide (H2O2); and filtering the slurry, thereby generating a cerium depleted mixed rare earth sulfate solution and cerium-rich mixed rare earth solids.

Dependencies are inferred from the claim text.