skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Selective oxoanion separation using a tripodal ligand

Patent ·
OSTI ID:1240417

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-BATTELLE, LLC (Oak Ridge, TN)
Patent Number(s):
9,260,326
Application Number:
13/485,118
OSTI ID:
1240417
Resource Relation:
Patent File Date: 2012 May 31
Country of Publication:
United States
Language:
English

References (23)

Anion hydrogen bond effects in the formation of planar or quintuple helical coordination polymers journal January 2008
Sulfate removal from waste chemicals by precipitation journal January 2009
Tripodal Ionophore with Sulfate Recognition Properties for Anion-Selective Electrodes journal November 2000
Advanced evaporation plants with sulfate removal by ion exchange journal December 1976
Sulfate removal from aqueous solutions by hydrous iron oxide macroscopic, thermal and spectroscopic analyses journal August 2007
Gradual Transition from NH···Pyridyl Hydrogen Bonding to the NH···O Tape Synthon in Pyridyl Ureas journal September 2008
Selectivity Principles in Anion Separation by Crystallization of Hydrogen-Bonding Capsules journal May 2010
Anion Separation with Metal–Organic Frameworks journal April 2007
Anion Coordination in Metal−Organic Frameworks Functionalized with Urea Hydrogen-Bonding Groups journal February 2006
Selective Crystallization of Urea-Functionalized Capsules with Tunable Anion-Binding Cavities journal April 2009
Sulfate Recognition by Persistent Crystalline Capsules with Rigidified Hydrogen-Bonding Cavities journal February 2008
Robustness of the CSSX Process to Feed Variation: Efficient Cesium Removal from the High Potassium Wastes at Hanford journal February 2010
Study of kinetic and fixed bed operation of removal of sulfate anions from an industrial wastewater by an anion exchange resin journal July 2009
Structural Design Criteria for Anion Hosts:  Strategies for Achieving Anion Shape Recognition through the Complementary Placement of Urea Donor Groups journal February 2005
Removal of sulfate and heavy metals by sulfate reducing bacteria in short-term bench scale upflow anaerobic packed bed reactor runs journal August 2003
Reverse Osmosis Separation of Sulfate, Nitrate, and Ammonia from Mining Effluents journal May 1981
Sulfur behavior in silicate glasses and melts: Implications for sulfate incorporation in nuclear waste glasses as a function of alkali cation and V2O5 content journal January 2007
Sulphate sequestered in the sulphate-binding protein of Salmonella typhimurium is bound solely by hydrogen bonds journal March 1985
Structure and selectivity trends in crystalline urea-functionalised anion-binding capsules journal January 2012
Sulfate Separation from Aqueous Alkaline Solutions by Selective Crystallization of Alkali Metal Coordination Capsules journal July 2011
Removal of sulfate from high-strength wastewater by crystallisation journal February 2009
Novel Polybenzimidazole (PBI) Nanofiltration Membranes for the Separation of Sulfate and Chromate from High Alkalinity Brine To Facilitate the Chlor-Alkali Process journal February 2007
Review: Waste-Pretreatment Technologies for Remediation of Legacy Defense Nuclear Wastes journal January 2011