US 11,850,571 B2
Multi-functionalized basic immobilized amine sorbents for removal of metal contaminants from wastewater
McMahan L Gray, Pittsburgh, PA (US); Brian W. Kail, Pittsburgh, PA (US); Walter Christopher Wilfong, Clinton, PA (US); Qiuming Wang, Bridgeville, PA (US); and Fan Shi, Pittsburgh, PA (US)
Assigned to United States Department of Energy, Washington, DC (US)
Filed by United States Department of Energy, Washington, DC (US)
Filed on Jul. 20, 2020, as Appl. No. 16/933,743.
Claims priority of provisional application 62/875,829, filed on Jul. 18, 2019.
Prior Publication US 2021/0016246 A1, Jan. 21, 2021
Int. Cl. B01D 15/08 (2006.01); B01J 20/10 (2006.01); B01J 20/26 (2006.01); B01J 20/32 (2006.01); C02F 1/28 (2023.01); C02F 103/18 (2006.01); C02F 101/10 (2006.01); C02F 101/22 (2006.01)
CPC B01J 20/265 (2013.01) [B01D 15/08 (2013.01); B01J 20/103 (2013.01); B01J 20/3204 (2013.01); B01J 20/3219 (2013.01); B01J 20/3272 (2013.01); C02F 1/288 (2013.01); C02F 1/285 (2013.01); C02F 2101/103 (2013.01); C02F 2101/106 (2013.01); C02F 2101/22 (2013.01); C02F 2103/18 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A double-crosslinked, immobilized amine solid sorbent composition, the composition comprising:
a silica support covalently bound to a first and a second cross linker,
wherein an aminosilane is the first cross linker, wherein the aminosilane comprises cross-linked aminosilane monomers,
wherein an epoxysilane is the second cross linker, and wherein the epoxysilane comprises cross-linked epoxysilane monomers; and,
a polyamine bound to the epoxysilane, wherein the polyamine is further bound to the aminosilane by hydrogen bonding.