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Method of removing niobium from uranium-niobium alloy

Patent ·
OSTI ID:5418790
; ;
This patent describes a method of removing niobium from a uranium-niobium alloy. It comprises dissolving the uranium-niobium alloy metal pieces in a first aqueous solution containing an acid selected from the group consisting of hydrochloric acid and sulfuric acid and fluoboric acid as a catalyst to provide a second aqueous solution, which includes uranium (U{sup +4}), acid radical ions, the acids insolubles including uranium oxides and niobium oxides; adding nitric acid to the insolubles to oxidize the niobium oxides to yield niobic acid and to complete the solubilization of any residual uranium; and separating the niobic acid from the nitric acid and solubilized uranium.
Assignee:
Nuclear Metals, Inc., Concord, MA (United States)
Patent Number(s):
US 5084253; A
Application Number:
PPN: US 7-455975
OSTI ID:
5418790
Country of Publication:
United States
Language:
English

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Related Subjects

050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDE ALLOYS
ACTINIDE COMPOUNDS
ALLOYS
AQUEOUS SOLUTIONS
BORON COMPOUNDS
CATALYSTS
CHALCOGENIDES
CHARGED PARTICLES
CHLORINE COMPOUNDS
DISPERSIONS
DISSOLUTION
ELEMENTS
FLUORINE COMPOUNDS
FLUOROBORIC ACID
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONS
METALS
MIXTURES
NIOBIUM
NIOBIUM ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NITRIC ACID
OXIDES
OXYGEN COMPOUNDS
RADICALS
REFRACTORY METAL COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SULFURIC ACID
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
URANIUM ALLOYS
URANIUM COMPOUNDS
URANIUM OXIDES