PROCESS FOR PREPARING PURE AMMONIUM DIURANATE CONCENTRATE

Sulphuric acid is added to a water suspension of ammonium diuranate or to the water-free concentrate. The pH is adjusted to 1 to 4.5. This action is accompanied by the selective dissolution of ammonium diuranate, while the main part of the ballast contaminants remains in the precipitate. The solutio...

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Bibliographic Details
Main Author CHARVAT JAN
Format Patent
LanguageEnglish
Published 17.03.1993
Edition5
Subjects
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS THEREOF
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:Sulphuric acid is added to a water suspension of ammonium diuranate or to the water-free concentrate. The pH is adjusted to 1 to 4.5. This action is accompanied by the selective dissolution of ammonium diuranate, while the main part of the ballast contaminants remains in the precipitate. The solution with reduced content of contaminants is separated, e.g. by filtration or centrifugation. From the resulting solution a suspension of pure ammonium diuranate is precipitated using gaseous ammonia or aqueous ammonia solution at pH 6.8 to 9.0.
Bibliography:Application Number: CS19900002233