U.S. Department of Energy

The United States of America As Represented by the Department of Energy

Brian W Kail

McMahan L Gray

Walter C Wilfong

Fan Shi

Qiuming Wang

Yee Soong

David Luebke

Hunaid B Nulwala

Nicholas S Siefert

Robert L Thompson

Christopher Mark Marin

Walter C Wifong

Jeffrey Culp

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), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing theREE and heavy metal-adsorbing amine sites within low cost, porous silica particles.

Stable immobilized amine sorbents for REE and heavy metal recovery from liquid sources

This disclosure provides polyamine sorbent compositions for the separation of metals from aqueous solutions. The polyamine sorbent compositions comprise a silica support, an aminosilane bound to the silica support, an epoxysilane bound to the silica support, and a polyamine where the polyamine is chemically tethered onto a solid silica support through via the epoxysilane. The polyamine may be further stabilized within the bulk sorbent through hydrogen bonding interactions with the aminosilane. The sorbent compositions resist leaching by HO in an aqueous stream containing heavy oxyanion-based (and other) metals and demonstrate stability over a pH range of 2-14. The sorbent compositions are useful for the separation of metals from aqueous solutions. The cationic heavy metals are captured by the co-existing amine groups (—NH, —NH, —N) from the polymeric network while additional metal capture capacity is derived from the introduction of a secondary silane linker.

Multi-functionalized basic immobilized amine sorbents for removal of metal contaminants from wastewater

The present disclosure relates to a method for the removal of organic contaminates from wastewater. The method comprises contacting wastewater comprising water and an organic contaminate with a basic immobilized amine sorbent, where the basic immobilized amine sorbent comprises a polyamine bound to an inorganic support via a linker, such that contacting the wastewater causes at a least a portion of the organic contaminate to bind to the basic immobilized amine sorbent.

Stable immobilized amine sorbents for removal of an organic contaminate from wastewater

The disclosure provides a composition for the separation of COfrom a gaseous mixture and a method of use thereof. The composition comprises solid Basic Immobilized Amine Sorbents (BIAS) suspended in silicone oil. The method of use comprises contacting the gaseous mixture with a sorbent slurry comprising Basic Immobilized Amine Sorbents (BIAS) and silicone oil to at least partially absorb the COfrom the gaseous mixture, and regenerating the BIAS slurry by causing desorption of the CO.

Regenerable non-aqueous basic immobilized amine slurries for removal of COfrom a gaseous mixture and a method of use thereof

The disclosure describes a pelletized sorbent comprising a first component comprising Basic Immobilized Amine Sorbent, a second component comprising inorganic strength additive, and a third component comprising polymer binder, where the Basic Immobilized Amine Sorbent and solid inorganic strength additive are interconnected by the polymer binder. The pelletized sorbent is useful for removing COfrom a gaseous mixture such as a post combustion gas stream.

Pelletized immobilized amine sorbent for COcapture

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Exemplary embodiments relate to methods for removal of COand other acid gases from gaseous fuels prior to combustion. Exemplary methods may be used for COcapture, Hpurification and natural gas sweetening. Exemplary methods use at least one ionic liquid that has excellent COsolubility, selectivity over hydrogen, low viscosity, and resistance to HS.

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Pittsburgh, PA, United States of America

Brian W Kail