	US 11,679,293 B2
	Quarternary ammonium halides for treating halogen contamination
Igor Kompaniets, Beer Sheva (IL); Or Press Frimet, Lehavim (IL); Ofer Cohen, Omer (IL); and Ran Elazari, Kibbutz Mishmar Hanegev (IL)
Assigned to BROMINE COMPOUNDS LTD., Beer-Sheva (IL)
Appl. No. 17/614,425
Filed by BROMINE COMPOUNDS LTD., Beer-Sheva (IL)
PCT Filed May 27, 2020, PCT No. PCT/IL2020/050593 § 371(c)(1), (2) Date Nov. 26, 2021, PCT Pub. No. WO2020/240561, PCT Pub. Date Dec. 3, 2020.
Claims priority of provisional application 62/853,177, filed on May 28, 2019.
Prior Publication US 2022/0226685 A1, Jul. 21, 2022
Int. Cl. A62D 3/33 (2007.01); A62D 3/37 (2007.01); B01D 53/68 (2006.01); C07C 211/63 (2006.01); C07D 213/20 (2006.01); A62D 101/49 (2007.01)

CPC A62D 3/33 (2013.01) [A62D 3/37 (2013.01); B01D 53/68 (2013.01); C07C 211/63 (2013.01); C07D 213/20 (2013.01); A62D 2101/49 (2013.01); B01D 2251/206 (2013.01); B01D 2251/304 (2013.01); B01D 2251/404 (2013.01); B01D 2251/80 (2013.01); B01D 2257/2022 (2013.01); B01D 2257/2025 (2013.01)]

23 Claims

1. A method for treating emergency spill or leak of halogen which is bromine or chlorine, comprising contacting an aqueous solution of quaternary ammonium halide with the halogen,

wherein the quaternary ammonium halide is selected from the group consisting of aliphatic and cyclic quaternary ammonium bromides or chlorides,

wherein the aliphatic quaternary ammonium bromide is of the formula R₁R₂R₃R₄N⁺Br⁻, wherein R₁, R₂, R₃and R₄are independently selected from linear or branched C₁-C₅alkyl,

wherein the R₁R₂R₃R₄N⁺Br⁻ is symmetrical quaternary ammonium bromide, such that R₁, R₂, R₃, and R₄are the same,

wherein the quaternary ammonium bromide is tetra ethyl ammonium bromide, tetra propyl ammonium bromide, or tetra butyl ammonium bromide, and

wherein the cyclic quaternary ammonium bromide or chloride is selected from the group consisting of 2-methyl-1-alkyl-pyridinium bromides, 2-methyl-1-alkyl-pyridinium chlorides, 3-methyl-1-alkyl-pyridinium bromides and 3-methyl-1-alkyl-pyridinium chlorides wherein the alkyl at position 1 of the ring is linear or branched C₁-C₅group.