Method for the simultaneous recovery of radionuclides from liquid radioactive wastes using a solvent

Patent · Sun Dec 31 23:00:00 EST 2000

OSTI ID:873841

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: United States of America as represented by United States Department (Washington, DC)
• Patent Number(s): US 6258333
• OSTI ID: 873841
• Country of Publication: United States
• Language: English

Related Subjects

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