Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1992-05-29
1993-12-28
Walsh, Donald P.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423122, 423 3, C01G 5600
Patent
active
052737250
ABSTRACT:
The process for converting water insoluble, hazardous materials of high mineral content containing, e.g., substantial metal values of one or more of Ca, Ta, Nb, Mn, Mg, Al or the like to valuable nonhazardous products or discard, wherein the material also contains substantial fluorine values and radionuclide values assaying above about 30 pCi/g, the process having the steps of contacting the materials with an acidic aqueous system or digest medium containing boric acid and an acid component containing one or more other mineral acids, the ratio of the system (Liters) to the material (Kg) ranging from about 2/1 to about 20/1, the total concentrations of all of the acids being sufficient to solubilize selected ones of the metal values at commercially acceptable rates, the contacting being carried out for a period of time and at temperatures sufficient to solubilize at least the fluorine and uranium values into a digest liquor, separating the uranium values from the digest liquor to give substantially purified uranium values, and contacting the resulting raffinate liquor with cation reactant to form and precipitate fluoride salt product, the salt product and the raffinate liquor both having radionuclide values assays of less than about 30 pCi/g.
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Chi Anthony R.
Eco Tek, Inc.
Walsh Donald P.
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