Thorium phosphates prepared by insolubilization of soluble thori

Details Thorium phosphates prepared by insolubilization of soluble thori Thorium phosphates prepared by insolubilization of soluble thori

1993-10-19

1995-04-04

Walsh, Donald P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 3, 423 11, 4231575, 252625, C01F 1300

Patent

active

054035651

ABSTRACT:
Environmental pollution stemming from the industrial discharge and/or storage of water-soluble thorium compounds is avoided by converting same into essentially innocuous water-insoluble thorium phosphates, notably orthorhombic thorium phosphates, by (i) reacting such water-soluble thorium compounds, e.g., the nitrates and/or chlorides, with a base, for example aqueous ammonia, in an aqueous reaction medium, to precipitate a thorium hydroxide therein, (ii) next reacting the precipitate thus formed with a phosphating compound, e.g., phosphoric acid or a soluble phosphate salt, also in an aqueous reaction medium, to precipitate a thorium phosphate therein, and then (iii) separating such thorium phosphate precipitate.

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patent: 5200378 (1993-04-01), Clearfield

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