The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
Mar. 03, 2000
Boris N. Zaitsev, St. Petersburg, RU;
Vyacheslav M. Esimantovskiy, St. Petersburg, RU;
Leonard N. Lazarev, St. Petersburg, RU;
Evgeniy G. Dzekun, Ozersk, RU;
Valeriy N. Romanovskiy, St. Petersburg, RU;
Terry A. Todd, Aberdeen, ID (US);
Ken N. Brewer, Arco, ID (US);
Ronald S. Herbst, Idaho Falls, ID (US);
Jack D. Law, Pocatello, ID (US);
The United States of America as represented by the United States Department of Energy, Washington, DC (US);
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 RC,H,(OCH,CH,),OH, 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.