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AMIDOXIME-FUNCTIONALIZED MATERIALS AND THEIR USE IN EXTRACTING METAL IONS FROM LIQUID SOLUTIONS

United States Patent Application

20170361304
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method of producing a functionalized material that extracts metal ions from solution, the method comprising: (i) providing a precursor material having nitrile groups appended to its surface; and (ii) reacting said nitrile groups with hydroxylamine or a derivative thereof in the presence of a polar aprotic solvent at a temperature of 60-80.degree. C. for at least 1 hour, to convert at least a portion of said nitrile groups to amidoxime and imide dioxime groups, followed by reaction with a base capable of hydrolyzing any remaining nitrile groups to carboxylic acid groups; wherein said functionalized material has a higher uranium absorption capacity than a functionalized material produced under same conditions except that the nitrile groups are reacted with hydroxylamine in only a protic solvent. The invention is also directed to functionalized materials produced by the above-described method, and methods for using the functionalized material for extracting metal ions from metal-containing solutions.
JANKE, Christopher J. (Oliver Springs, TN), MAYES, Richard T. (Knoxville, TN), DAS, Sadananda (Kissimmee, FL), DAI, Sheng (Knoxville, TN)
15/ 625,276
June 16, 2017
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.