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

United States Patent

July 10, 2001
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
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.
Romanovskiy; Valeriy Nicholiavich (St. Petersburg, RU), Smirnov; Igor V. (St. Petersburg, RU), Babain; Vasiliy A. (St. Petersburg, RU), Todd; Terry A. (Aberdeen, ID), Brewer; Ken N. (Arco, ID)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 414,446
October 7, 1999
ACKNOWLEDGMENTS This invention was made with government support under Contract No. DE-AC-07-94ID13223 awarded by Department of Energy to the Lockheed Idaho Technologies Company. The government has certain rights in the invention.