Patent ID: 11891323
Assignee: REVIVE ENVIRONMENTAL TECHNOLOGY, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
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.