Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Regeneration of strong-base anion-exchange resins by sequential chemical displacement

Patent ·
OSTI ID:874718
 [1];  [2];  [2];  [1]
  1. Knoxville, TN
  2. Oak Ridge, TN
+ Show Author Affiliations
A method for regenerating strong-base anion exchange resins utilizing a sequential chemical displacement technique with new regenerant formulation. The new first regenerant solution is composed of a mixture of ferric chloride, a water-miscible organic solvent, hydrochloric acid, and water in which tetrachloroferrate anion is formed and used to displace the target anions on the resin. The second regenerant is composed of a dilute hydrochloric acid and is used to decompose tetrachloroferrate and elute ferric ions, thereby regenerating the resin. Alternative chemical displacement methods include: (1) displacement of target anions with fluoroborate followed by nitrate or salicylate and (2) displacement of target anions with salicylate followed by dilute hydrochloric acid. The methodology offers an improved regeneration efficiency, recovery, and waste minimization over the conventional displacement technique using sodium chloride (or a brine) or alkali metal hydroxide.
Research Organization:
LOCKHEED MARTIN ENERGY RES COR
DOE Contract Number:
AC05-96OR22464
Assignee:
U.T. Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
US 6448299
OSTI ID:
874718
Country of Publication:
United States
Language:
English

References (5)

Facile Abstraction of Successive Oxygen Atoms from Perchlorate Ions by Methylrhenium Dioxide journal December 1995
Reduction of perchlorate ion by (N-(hydroxyethyl)ethylenediaminetriacetato) aquatitanium(III) journal October 1984
Oxygen-Transfer Reactions of Methylrhenium Oxides journal January 1996
Adsorption of Pertechnetate on an Anion Exchange Resin journal January 1993
Technetium partitioning for the Hanford Tank Waste Remediation System: anion exchange studies for partitioning technetium from synthetic DSSF and DSS simulants and actual Hanford wastes (101-SY and 103-SY) using Rellex-HPQ resin report December 1995

Similar Records

Regeneration of anion exchange resins by catalyzed electrochemical reduction
Patent · Mon Dec 31 23:00:00 EST 2001 · OSTI ID:874288
SEPARATION OF HAFNIUM FROM ZIRCONIUM BY ANION EXCHANGE
Journal Article · Sat Dec 31 23:00:00 EST 1960 · J. Research Natl. Bur. Standards · OSTI ID:4106917
Purification of uranium by selective sorption of uranyl chloride on anion resin
Technical Report · Wed Jan 31 23:00:00 EST 1973 · OSTI ID:4937382

Related Subjects

/521/525/
acid
alkali
alkali metal
alternative
anion
anion exchange
anion-exchange
anions
brine
chemical
chloride
composed
conventional
decompose
dilute
displace
displacement
efficiency
elute
exchange
exchange resin
ferric
fluoroborate
followed
formed
formulation
hydrochloric
hydroxide
improved
ion-exchange resin
metal
method
methodology
methods
minimization
mixture
nitrate
offers
organic
organic solvent
recovery
regenerant
regenerating
regeneration
resin
resins
salicylate
sequential
sodium
sodium chloride
solution
solvent
strong-base
target
technique
tetrachloroferrate
utilizing
waste
water
water-miscible