Process for the separation of radioactive impurities of baddeleyite

A process for separating radioactive impurities from baddeleyite to obtain zirconium dioxide containing only traces of radioactive impurities, comprising grinding the baddeleyite preferably to a particle size of a maximum of 2% greater than 0.06 mm and then treating it directly with a 10 to 60% by w...

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Bibliographic Details
Main Authors DENEKE; KLAUS, LENZ; ARNOLD
Format Patent
LanguageEnglish
Published 19.05.1981
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
CONCRETE
DECONTAMINATION ARRANGEMENTS THEREFOR
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT
REFRACTORIES
SLAG
TREATING RADIOACTIVELY CONTAMINATED MATERIAL
TREATMENT OF NATURAL STONE
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Summary:A process for separating radioactive impurities from baddeleyite to obtain zirconium dioxide containing only traces of radioactive impurities, comprising grinding the baddeleyite preferably to a particle size of a maximum of 2% greater than 0.06 mm and then treating it directly with a 10 to 60% by weight aqueous alkali hydroxide solution at elevated temperatures below the boiling point of said solution at temperatures of 80 DEG to 140 DEG C. for 2 to 15 hours or until the desired degree of purity of the zirconium dioxide is obtained. In a preferred embodiment, sodium hydroxide is utilized and the ground baddeleyite preliminarily has been purified to the content of greater than 98% (zirconium dioxide+hafnium dioxide) by known methods.
Bibliography:Application Number: US19760747137