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Title: Selective oxoanion separation using a tripodal ligand

The present invention relates to urea-functionalized crystalline capsules self-assembled by sodium or potassium cation coordination and by hydrogen-bonding water bridges to selectively encapsulate tetrahedral divalent oxoanions from highly competitive aqueous alkaline solutions and methods using this system for selective anion separations from industrial solutions. The method involves competitive crystallizations using a tripodal tris(urea) functionalized ligand and, in particular, provides a viable approach to sulfate separation from nuclear wastes.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1240417
Assignee:
UT-BATTELLE, LLC (Oak Ridge, TN) ORNL
Patent Number(s):
9,260,326
Application Number:
13/485,118
Contract Number:
AC05-00OR22725
Resource Relation:
Patent File Date: 2012 May 31
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 08 HYDROGEN

Works referenced in this record:

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Sulfate removal from aqueous solutions by hydrous iron oxide macroscopic, thermal and spectroscopic analyses
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Sulfate Recognition by Persistent Crystalline Capsules with Rigidified Hydrogen-Bonding Cavities
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Removal of sulfate from high-strength wastewater by crystallisation
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