Process for the separation of radioactive impurities of baddeley

Details Process for the separation of radioactive impurities of baddeley Process for the separation of radioactive impurities of baddeley

1976-12-03

1981-05-19

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 80, 423 84, C01G 4300, C01G 2502, C01G 2702

Patent

active

042684854

ABSTRACT:
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.degree. to 140.degree. 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.

REFERENCES:
patent: 2875107 (1959-02-01), Daiger
patent: 2974014 (1961-03-01), Hoekje et al.
patent: 3413082 (1968-11-01), Owens
patent: 3856512 (1974-12-01), Palmer et al.
patent: 4067953 (1978-01-01), Roux et al.

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