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STABLE IMMOBILIZED AMINE SORBENTS FOR REE AND HEAVY METAL RECOVERY FROM LIQUID SOURCES

United States Patent Application

20180100065
A1
View the Complete Application at the US Patent & Trademark Office
Application of Immobilized Amine Sorbents for Recovery of Rare Earth Elements from Aqueous Systems
Materials, methods of making, and methods of using a stable and regenerable immobilized amine sorbents for rare earth element and heavy metal recovery from liquid sources. Embodiments of the invention relate to the novel combination of different polyamines, primarily polyethylenimine Mw=800 (PEI.sub.800), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing the REE and heavy metal-adsorbing amine sites within low cost, porous silica particles.
Gray, McMahan L. (Pittsburgh, PA), Kail, Brian W. (Pittsburgh, PA), Wilfong, Walter C. (Jefferson HIlls, PA), Wang, Qiuming (South Park, PA)
15/ 782,315
October 12, 2017
STATEMENT OF GOVERNMENT SUPPORT [0002] The United States Government has rights in this invention pursuant to an employer/employee relationship between the inventors and the U.S. Department of Energy, and to site-support contractors at the National Energy Technology Laboratory.