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Title: Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture

Abstract

Methods for removing oxyanions from water according to the following steps: (i) dissolving an oxyanion precipitating compound into the aqueous source to result in precipitation of an oxyanion salt of the oxyanion precipitating compound; and (ii) removing the oxyanion salt from the water containing the oxyanion to result in water substantially reduced in concentration of the oxyanion; wherein the oxyanion precipitating compound has the following composition: wherein A is a ring-containing moiety and Xm− is an anionic species with a magnitude of charge m. The invention employs bis-iminoguanidinium compounds according to Formula (1a) as well as neutral precursor compounds according to Formula (1), which can be used for removing undesirable species from aqueous solutions or air, such as removal of sulfate from water and carbon dioxide from air.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1650814
Patent Number(s):
10633332
Application Number:
16/129,979
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07D - HETEROCYCLIC COMPOUNDS
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 09/13/2018
Country of Publication:
United States
Language:
English

Citation Formats

Custelcean, Radu, Seipp, Charles A., and Williams, Neil J.. Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture. United States: N. p., 2020. Web.
Custelcean, Radu, Seipp, Charles A., & Williams, Neil J.. Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture. United States.
Custelcean, Radu, Seipp, Charles A., and Williams, Neil J.. Tue . "Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture". United States. https://www.osti.gov/servlets/purl/1650814.
@article{osti_1650814,
title = {Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture},
author = {Custelcean, Radu and Seipp, Charles A. and Williams, Neil J.},
abstractNote = {Methods for removing oxyanions from water according to the following steps: (i) dissolving an oxyanion precipitating compound into the aqueous source to result in precipitation of an oxyanion salt of the oxyanion precipitating compound; and (ii) removing the oxyanion salt from the water containing the oxyanion to result in water substantially reduced in concentration of the oxyanion; wherein the oxyanion precipitating compound has the following composition: wherein A is a ring-containing moiety and Xm− is an anionic species with a magnitude of charge m. The invention employs bis-iminoguanidinium compounds according to Formula (1a) as well as neutral precursor compounds according to Formula (1), which can be used for removing undesirable species from aqueous solutions or air, such as removal of sulfate from water and carbon dioxide from air.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}

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Works referenced in this record:

Selective oxoanion separation using a tripodal ligand
patent, February 2016