Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – Chemical conversion to a stable solid for disposal
Patent
1996-11-13
1997-10-14
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
Chemical conversion to a stable solid for disposal
423 11, 423158, 423166, 588 20, G21F 900
Patent
active
056782411
ABSTRACT:
The present invention describes a process to reduce the volume and/or weight of magnesium slag when the magnesium slag contains radioactive thorium. The process contacts the magnesium slag as an aqueous slurry with an acid in a pH range from about 4.0 to about 8.0, preferably from about 5.0 to about 5.5, followed by separating insoluble solids from the aqueous solution. Optionally, the acid digested solids are heated, either before or after the acid digestion, at a temperature from about 350.degree. to about 500.degree. C. The solid waste can then be further compacted, if desired, prior to disposal.
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Kiefer Garry E.
Simon Jaime
Wilson David A.
Mai Ngoclan
The Dow Chemical Company
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