US 12,304,850 B2
Methods and systems of PFAS destruction using UV irradiation at 222 nanometers
Andrew Thomas Healy, Minneapolis, MN (US); Evan Anthony Leslie, Minneapolis, MN (US); Zekun Liu, Brooklyn Park, MN (US); Terrance P. Smith, Woodbury, MN (US); and Joseph Reuel Levine Tirado, Minneapolis, MN (US)
Assigned to Claros Technologies Inc., Minneapolis, MN (US)
Filed by Claros Technologies Inc., Minneapolis, MN (US)
Filed on Jul. 12, 2024, as Appl. No. 18/771,104.
Claims priority of provisional application 63/635,938, filed on Apr. 18, 2024.
Claims priority of provisional application 63/591,040, filed on Oct. 17, 2023.
Claims priority of provisional application 63/513,782, filed on Jul. 14, 2023.
Prior Publication US 2025/0019285 A1, Jan. 16, 2025
Int. Cl. C02F 9/00 (2023.01); B01J 41/00 (2006.01); C02F 1/32 (2023.01); C02F 1/42 (2023.01); C02F 1/44 (2023.01); C02F 1/461 (2023.01); C02F 1/469 (2023.01); C02F 1/72 (2023.01); C02F 5/06 (2023.01); C02F 1/02 (2023.01); C02F 1/467 (2023.01); C02F 1/66 (2023.01); C02F 1/70 (2023.01); C02F 1/78 (2023.01); C02F 101/12 (2006.01); C02F 101/16 (2006.01); C02F 101/36 (2006.01); C02F 103/06 (2006.01)
CPC C02F 9/00 (2013.01) [B01J 41/00 (2013.01); C02F 1/32 (2013.01); C02F 1/42 (2013.01); C02F 1/441 (2013.01); C02F 1/442 (2013.01); C02F 1/46109 (2013.01); C02F 1/469 (2013.01); C02F 1/722 (2013.01); C02F 5/06 (2013.01); C02F 1/02 (2013.01); C02F 1/325 (2013.01); C02F 2001/425 (2013.01); C02F 2001/46133 (2013.01); C02F 2001/46152 (2013.01); C02F 1/4676 (2013.01); C02F 1/66 (2013.01); C02F 1/70 (2013.01); C02F 1/78 (2013.01); C02F 2101/12 (2013.01); C02F 2101/163 (2013.01); C02F 2101/36 (2013.01); C02F 2103/06 (2013.01); C02F 2201/322 (2013.01); C02F 2201/3225 (2013.01); C02F 2201/3227 (2013.01); C02F 2201/46115 (2013.01); C02F 2201/4616 (2013.01); C02F 2201/4619 (2013.01); C02F 2305/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of PFAS destruction comprising:
a. adding an amount of persulfate and acid or base to an aqueous solution including PFAS to decrease or increase a pH and subjecting the aqueous solution including PFAS to an increased temperature and pressure of at least about 1 bar for a period of time sufficient for thermal oxidation;
b. after step a, adding a sulfite salt to the aqueous solution including PFAS;
c. after step a, if the pH of the aqueous solution is less than about 10, adding base to the aqueous solution including PFAS to increase the pH to about 10 or more; and
d. after steps a-c, irradiating the aqueous solution including PFAS with light at 222 nm.