US 12,083,494 B2
Modified clay sorbents and methods of sorbing PFAS using the same
Michael Donovan, Hoffman Estates, IL (US)
Assigned to Specialty Minerals (Michigan) Inc., Bingham Farms, MI (US)
Appl. No. 17/612,936
Filed by Specialty Minerals (Michigan) Inc., Bingham Farms, MI (US)
PCT Filed May 22, 2020, PCT No. PCT/US2020/034219
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/237153, PCT Pub. Date Nov. 26, 2020.
Claims priority of provisional application 62/851,431, filed on May 22, 2019.
Prior Publication US 2022/0339600 A1, Oct. 27, 2022
Int. Cl. B01J 20/22 (2006.01); B01J 20/12 (2006.01); B01J 20/32 (2006.01); B09C 1/00 (2006.01); B09C 1/08 (2006.01); C02F 1/28 (2023.01); C02F 101/36 (2006.01); C02F 103/06 (2006.01)
CPC B01J 20/12 (2013.01) [B01J 20/22 (2013.01); B01J 20/3246 (2013.01); B09C 1/002 (2013.01); B09C 1/08 (2013.01); C02F 1/281 (2013.01); C02F 1/288 (2013.01); B09C 2101/00 (2013.01); C02F 2101/36 (2013.01); C02F 2103/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of sorbing PFAS compounds from a contaminated environment, comprising:
admixing a modified clay sorbent with the contaminated environment, wherein the modified clay sorbent comprises a clay intercalated with one or more di-quaternary amine compounds, wherein the di-quaternary amine compound is dequalinium chloride and/or a compound of formula I

OG Complex Work Unit Chemistry
wherein X is chloride and R1 is an aliphatic radical having 1 to 13 carbons, and R2, R3, R4, R5, R6, and R7 are independently selected from aliphatic radicals and aromatic radicals, and at least one of R2, R3, R4, R5, R6, and R7 is an aliphatic radical or aromatic radical having 8 or more carbons.