Published January 28, 1992 | Version v1
Patent Metadata-only

Method of removing niobium from uranium-niobium alloy

Creators

Description

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+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

Availability note (English)

Patent and Trademark Office, Box 9, Washington, DC 20232 (United States).

Additional details

Publishing Information

Imprint Pagination
vp.
IPC:
Int. Cl. C01G 33/00.
IPC
Int. Cl. C01G 33/00.
Patent number
US patent document 5,084,253/A/

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
23061775
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
AQUEOUS SOLUTIONS; CATALYSTS; DISSOLUTION; FLUOROBORIC ACID; HYDROCHLORIC ACID; IONS; NIOBIUM; NIOBIUM ALLOYS; NIOBIUM OXIDES; NITRIC ACID; RADICALS; REMOVAL; SEPARATION PROCESSES; SULFURIC ACID; URANIUM ALLOYS; URANIUM OXIDES
Descriptors DEC
ACTINIDE ALLOYS; ACTINIDE COMPOUNDS; ALLOYS; BORON COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHLORINE COMPOUNDS; DISPERSIONS; ELEMENTS; FLUORINE COMPOUNDS; HALOGEN COMPOUNDS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; METALS; MIXTURES; NIOBIUM COMPOUNDS; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SOLUTIONS; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; URANIUM COMPOUNDS