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Email this article A novel Procedure for the Recovery of Rosetta Monazite Metal Values through its Acid Treatment
Abstract
Egyptian monazite is chemically processed after its breakdown using sulfate process for recovering of REEs, thorium and uranium. Beside removal of these elements as radioactive contaminates from REEs products, their recovery would increase to their importance in the field of nuclear energy. In this work Egyptian monazite with 90% concentrate was used. The later has 57.8% of REEs in addition to thorium and uranium assays 5.8% and 0.29% respectively as well as small quantity of ferric oxide, titanium oxide and silica. In this work monazite is digested in 2M sulfuric acid where Th4+ ion combine with sulfate ions to form anion complex and uranyl complex whose passes through strong cation resin Amberlite IR120 where thorium precipitated using oxalic acid leaving behind uranium which precipitated at 5.5 pH as uranyl phosphate. On the other hand REEs adsorbed on resin completely by excess addition of hydrazine sulfate to reduce Ce (IV) to Ce (III) followed by elution with 4N HCl to form pure REEs.
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