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Method of stripping metals from organic solvents

United States Patent

February 24, 2009
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A new method to strip metals from organic solvents in a manner that allows for the recycle of the stripping agent. The method utilizes carbonate solutions of organic amines with complexants, in low concentrations, to strip metals from organic solvents. The method allows for the distillation and reuse of organic amines. The concentrated metal/complexant fraction from distillation is more amenable to immobilization than solutions resulting from current practice.
Todd; Terry A. (Aberdeen, ID), Law; Jack D. (Pocatello, ID), Herbst; R. Scott (Idaho Falls, ID), Romanovskiy; Valeriy N. (St. Petersburg, RU), Smirnov; Igor V. (St.-Petersburg, RU), Babain; Vasily A. (St-Petersburg, RU), Esimantovski; Vyatcheslav M. (St-Petersburg, RU)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
10/ 602,654
June 25, 2003
CONTRACTUAL ORIGIN The present invention was conceived and developed under a U.S. Government Contract awarded by the U.S. Department of Energy. The Government has rights in this invention.