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Organic polymer compositions for removal of oxoanions from aqueous solutions

Patent ·
OSTI ID:1893067
An organic polymer composition (OPC) comprising guanidinium-containing A units interconnected with B units of the formula *—R*)r, wherein each asterisk (*) in A units denotes a connection point with an asterisk in B units; R is a hydrocarbon linking group containing at least one carbon atom; r is an integer of 1, 2, or 3; and the composition necessarily includes an anionic species Xm− with a magnitude of charge m of at least 1, wherein the sum of negative charge provided by anionic species Xm− counterbalances the total positive charge provided by the A units. Also described herein is a method for removing one or more oxoanions from an aqueous source by (i) contacting the aqueous source with the above described OPC to result in absorption of the oxoanion into the OPC to produce an oxoanion-containing OPC; and (ii) removing the oxoanion-containing OPC from the aqueous source.
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):
11,369,944
Application Number:
16/660,142
OSTI ID:
1893067
Country of Publication:
United States
Language:
English

References (10)

Molecular recognition of oxoanions based on guanidinium receptors journal January 2007
Three-Dimensional Ionic Covalent Organic Frameworks for Rapid, Reversible, and Selective Ion Exchange journal November 2017
Ionic Covalent Organic Frameworks with Spiroborate Linkage journal December 2015
Imidazolium-Based Porous Organic Polymers: Anion Exchange-Driven Capture and Luminescent Probe of Cr 2 O 7 2– journal July 2016
Guanidinium-Based Ionic Covalent Organic Framework for Rapid and Selective Removal of Toxic Cr(VI) Oxoanions from Water journal October 2018
Folic Acid-Polyaniline Hybrid Hydrogel for Adsorption/Reduction of Chromium(VI) and Selective Adsorption of Anionic Dye from Water journal August 2017
Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications journal January 2016
Aqueous Sulfate Separation by Sequestration of [(SO 4 ) 2 (H 2 O) 4 ] 4− Clusters within Highly Insoluble Imine-Linked Bis-Guanidinium Crystals journal December 2015
Self-Exfoliated Guanidinium-Based Ionic Covalent Organic Nanosheets (iCONs) journal February 2016
Selective Removal of Cr(VI) Oxyanions with a New Anion Exchanger journal November 1998

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