US 11,891,323 B2
Salt separation and destruction of PFAS utilizing reverse osmosis and salt separation
Stephen H. Rosansky, Columbus, OH (US); Michael Miller, Powell, OH (US); Patrick Norris, Columbus, OH (US); Darwin Argumedo, Columbus, OH (US); Douglas Hendry, Columbus, OH (US); Ian Haggerty, Dublin, OH (US); Keith Brown, Columbus, OH (US); Joshua James, Columbus, OH (US); Joseph Casciano, Columbus, OH (US); Slawomir Winecki, Columbus, OH (US); Vivek Lal, Columbus, OH (US); and Tom McGuinness, Columbus, OH (US)
Assigned to Revive Environmental Technology, LLC, Columbus, OH (US)
Filed by Revive Environmental Technology, LLC, Columbus, OH (US)
Filed on Aug. 9, 2022, as Appl. No. 17/883,600.
Application 17/883,600 is a continuation of application No. 17/396,599, filed on Aug. 6, 2021, granted, now 11,407,666.
Claims priority of provisional application 63/062,251, filed on Aug. 6, 2020.
Prior Publication US 2023/0047367 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 61/02 (2006.01); B01D 61/08 (2006.01); B01D 61/10 (2006.01); C02F 1/02 (2023.01); C02F 1/38 (2023.01); C02F 1/44 (2023.01); C02F 1/52 (2023.01); C02F 1/72 (2023.01); C02F 101/36 (2006.01); C02F 103/06 (2006.01); C02F 9/00 (2023.01); B04C 5/04 (2006.01); B04C 5/081 (2006.01); B04C 5/085 (2006.01); B04C 5/20 (2006.01); C04B 35/12 (2006.01); C04B 35/622 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 61/025 (2013.01); B01D 61/08 (2013.01); B01D 61/10 (2013.01); B04C 5/04 (2013.01); B04C 5/081 (2013.01); B04C 5/085 (2013.01); B04C 5/20 (2013.01); C04B 35/12 (2013.01); C04B 35/62222 (2013.01); B01D 2311/08 (2013.01); B01D 2311/103 (2013.01); B01D 2311/12 (2013.01); B01D 2311/2634 (2013.01); B01D 2311/2642 (2013.01); B01D 2311/2649 (2013.01); B01D 2311/2676 (2013.01); B01D 2313/221 (2022.08); C02F 1/02 (2013.01); C02F 1/38 (2013.01); C02F 1/441 (2013.01); C02F 1/52 (2013.01); C02F 1/72 (2013.01); C02F 2101/36 (2013.01); C02F 2103/06 (2013.01); C02F 2303/10 (2013.01); C04B 2235/9692 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of destroying PFAS, comprising: providing an aqueous solution comprising water and PFAS;
subjecting the aqueous solution to reverse osmosis to produce a clean water fraction and a briny concentrated fraction in which the PFAS concentration is at least 50% greater than the aqueous solution;
preheating the briny concentrated fraction in a heat exchanger to form a preheated concentrated fraction that is at subcritical conditions;
passing the preheated concentrated fraction into a pre-reactor where the briny concentrated fraction is converted to supercritical conditions at a first temperature causing sodium chloride to precipitate;
removing at least a portion of the sodium chloride to produce a brine-reduced fraction;
passing the brine-reduced fraction to a reactor where the fraction is subjected to oxidation under supercritical conditions wherein the concentration of oxidant and/or temperature is higher than in the pre-reactor;
producing a clean hot water solution having a concentration of PFAS that is at least 90% less than the aqueous solution; and, wherein a fuel or oxidizer is added to the pre-reactor; and further comprising transferring heat from the clean hot water solution to the aqueous solution in the heat exchanger in the preheating step.