Solvent for the simultaneous recovery of radionuclides from liquid radioactive wastes

Patent · Mon Dec 31 23:00:00 EST 2001

OSTI ID:874820

Romanovskiy, Valeriy Nicholiavich ^[1]; Smirnov, Igor V ^[1]; Babain, Vasiliy A ^[1]; Todd, Terry A ^[2]; Brewer, Ken N ^[3]

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1. St. Petersburg, RU
2. Aberdeen, ID
3. Arco, ID

The present invention relates to solvents, and methods, for selectively extracting and recovering radionuclides, especially cesium and strontium, rare earths and actinides from liquid radioactive wastes. More specifically, the invention relates to extracting agent solvent compositions comprising complex organoboron compounds, substituted polyethylene glycols, and neutral organophosphorus compounds in a diluent. The preferred solvent comprises a chlorinated cobalt dicarbollide, diphenyl-dibutylmethylenecarbamoylphosphine oxide, PEG-400, and a diluent of phenylpolyfluoroalkyl sulfone. The invention also provides a method of using the invention extracting agents to recover cesium, strontium, rare earths and actinides from liquid radioactive waste.

• Research Organization: Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
• DOE Contract Number: AC07-94ID13223
• Assignee: The United States of America as represented by the United States Department (Washington, DC)
• Patent Number(s): US 6468445
• OSTI ID: 874820
• Country of Publication: United States
• Language: English

Related Subjects

/252/423/
actinides
agent
agents
cesium
chlorinated
cobalt
complex
compositions
compounds
comprising
dicarbollide
diluent
diphenyl-dibutylmethylenecarbamoylphosphine
earths
especially
extracting
glycols
liquid
liquid radioactive
method
methods
neutral
organoboron
organophosphorus
oxide
peg-400
phenylpolyfluoroalkyl
polyethylene
polyethylene glycol
provides
radioactive
radioactive waste
radionuclides
rare
rare earth
recover
recovering
recovery
relates
selectively
selectively extract
simultaneous
solvent
solvents
specifically
strontium
substituted
sulfone
waste
wastes