Method of removing phosphorus impurities from yellowcake

Abstract

Phosphorus impurities are removed from yellowcake by dissolving it in hydrochloric or sulfuric acid to a U.sub.3 O.sub.8 assay of at least 150 g/l at a pH of 2; precipitating uranium peroxide with hydrogen peroxide while keeping the pH between 2.2 and 2.6 and recovering the uranium peroxide from the phosphorus impurities remaining in solution.

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