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Room temperature electrodeposition of actinides from ionic solutions

Patent ·
OSTI ID:1353071
; ; ;
Uranic and transuranic metals and metal oxides are first dissolved in ozone compositions. The resulting solution in ozone can be further dissolved in ionic liquids to form a second solution. The metals in the second solution are then electrochemically deposited from the second solutions as room temperature ionic liquid (RTIL), tri-methyl-n-butyl ammonium n-bis(trifluoromethansulfonylimide) [Me.sub.3N.sup.nBu][TFSI] providing an alternative non-aqueous system for the extraction and reclamation of actinides from reprocessed fuel materials. Deposition of U metal is achieved using TFSI complexes of U(III) and U(IV) containing the anion common to the RTIL. TFSI complexes of uranium were produced to ensure solubility of the species in the ionic liquid. The methods provide a first measure of the thermodynamic properties of U metal deposition using Uranium complexes with different oxidation states from RTIL solution at room temperature.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-05ID14517; FC07-06ID14781
Assignee:
THE BOARD OF REGENTS OF THE NEVADA SYSTEM OF HIGHER EDUCATION ON BEHALF OF THE UNIVERSITY OF NEVADA, LAS VEGAS
Patent Number(s):
9,631,290
Application Number:
13/764,282
OSTI ID:
1353071
Country of Publication:
United States
Language:
English

References (9)

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Cyclic Voltammetry of Th(IV) in the Room-Temperature Ionic Liquid [Me 3 N n Bu][N(SO 2 CF 3 ) 2 ] journal February 2006
Structural Characterization of a Lanthanum Bistriflimide Complex, La(N(SO 2 CF 3 ) 2 ) 3 (H 2 O) 3 , and an Investigation of La, Sm, and Eu Electrochemistry in a Room-Temperature Ionic Liquid, [Me 3 N n Bu][N(SO 2 CF 3 ) 2 ] journal July 2005
An Experimental Study of Molten Salt Electrorefining of Uranium Using Solid Iron Cathode and Liquid Cadmium Cathode for Development of Pyrometallurgical Reprocessing journal April 1997
Electrochemistry of soluble UO22+ from the direct dissolution of UO2CO3 in acidic ionic liquid containing water journal March 2013
Room-temperature ionic liquid for lanthanum electrodeposition journal November 2008
Electrodeposition of cesium at mercury electrodes in the tri-1-butylmethylammonium bis((trifluoromethyl)sulfonyl)imide room-temperature ionic liquid journal November 2004
Uranium extraction from aqueous solutions by ionic liquids journal December 2009
Dissolution of uranium oxides and electrochemical behavior of U(VI) in task specific ionic liquid journal July 2008

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36 MATERIALS SCIENCE
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