Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1996-09-26
1998-07-28
Langel, Wayne
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 16, 423 211, 423 215, 423 68, 423 70, C01F 1700, C01G 3300, C01G 3500, C01G 43025
Patent
active
057873321
ABSTRACT:
A process for treating composite materials comprising metals and having significant radioactivity for separation into concentrated individual products is provided. The process of the invention recovers valuable metals and semi-metal elements including rare earth, transition metal, radioactive elements, and compounds and composites thereof as commercially viable products while isolating the radioactive components. They key components in the composite material which are desired to be recovered are tantalum, niobium, and scandium due to their high commercial values and significant quantities. The process further includes the capability to recover uranium, thorium, rare earth, and zirconium products. Generally, the process consists of an initial sulfate roast followed by a series of hydrometallurgical unit operations designed to separate and purify the desired components into commercially usable products, such as tantalum and/or niobium in the form of metal oxides, M.sub.2 O.sub.5 ; uranium in the form of yellowcake; thorium oxalate; zirconium oxide; and rare earth sulfates.
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Black William D.
Notzl-Loiselle Henrietta
Tierney David R.
Fansteel Inc.
Langel Wayne
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