Patents by Inventor Evgeniy G. Dzekun

Evgeniy G. Dzekun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Extraction processes and solvents for recovery of cesium, strontium, rare earth elements, technetium and actinides from liquid radioactive waste
    Patent number: 6270737
    Abstract: Cesium and strontium are extracted from aqueous acidic radioactive waste containing rare earth elements, technetium and actinides, by contacting the waste with a composition of a complex organoboron compound and polyethylene glycol in an organofluorine diluent mixture. In a preferred embodiment the complex organoboron compound is chlorinated cobalt dicarbollide, the polyethylene glycol has the formula RC6H4(OCH2CH2)nOH, and the organofluorine diluent is a mixture of bis-tetrafluoropropyl ether of diethylene glycol with at least one of bis-tetrafluoropropyl ether of ethylene glycol and bis-tetrafluoropropyl formal. The rare earths, technetium and the actinides (especially uranium, plutonium and americium), are extracted from the aqueous phase using a phosphine oxide in a hydrocarbon diluent, and reextracted from the resulting organic phase into an aqueous phase by using a suitable strip reagent.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: August 7, 2001
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Boris N. Zaitsev, Vyacheslav M. Esimantovskiy, Leonard N. Lazarev, Evgeniy G. Dzekun, Valeriy N. Romanovskiy, Terry A. Todd, Ken N. Brewer, Ronald S. Herbst, Jack D. Law