Method for treating hydrated green salt

Details Method for treating hydrated green salt Method for treating hydrated green salt

1992-01-13

1993-08-24

Stoll, Robert L.

Chemistry of inorganic compounds

Radioactive

Uranium compound

264 05, C01G 4306, G21C 2100

Patent

active

052386678

ABSTRACT:
A method of producing a high density, low hygroscopic green salt from hydrated green salt includes heating a charge of hydrated green salt in a nonreactive atmosphere to a first temperature above the boiling point of water to drive off free water; heating the charge in a nonreactive atmosphere to a second temperature higher than the first temperature to drive off the water of crystallization present in the green salt; heating the charge in a nonreactive atmosphere to a third temperature higher than the second temperature to induce anhygroscopicity of the charge; and cooling the charge to approximately 400.degree. F. or less in a protective atmosphere to prevent atmospheric oxidation and hydrolysis.

REFERENCES:
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patent: 3069228 (1962-12-01), Davis et al.
patent: 3175879 (1965-03-01), Townend et al.
patent: 3985551 (1976-10-01), Powell et al.
Katz, J. J., Seaborg, G. T. and Moss, L. R., The Chemistry of the Actinide Elements, vol. 1, 2nd Edition, Chapman Hall (1986) p. 304.
Katz, J. J. and Rabinowitch, E., The Chemistry of Uranium, Port I., N.Y. McGraw-Hill, 1951, p. 360.
Crump, W. A. and Kennely, J. A., "Conversion of Scrap Metal to pure UF4 by Aqueous Methods" Mallinckrodt Chemical Works, MCW 1407, 1957.

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