Destruction of PFAS via an oxidation process and apparatus suitable for transportation to contaminated sites

US11401180B2 · kind B2 · utility

Assignee

• Battelle Memorial Institute · CH

Inventors

• Lindy E. Dejarme · Columbus, US
• Kavitha Dasu · Powell, US
• Russel R. Sirabian · Columbus, US
• Amy Dindal · Rockland, US
• Jeffrey L. Ellis · Columbus, US
• Amy M. Heintz · Dublin, US
• Dan Garbark · Columbus, US
• Nathan Bryant · Columbus, US
• John Tallarico · Powell, US
• Joseph Casciano · Columbus, US
• Slawomir Winecki · Columbus, US
• David Holley · Lancaster, US
• Joshua James · Columbus, US
• Keith Brown · Solon, US
• Doug Hendry · Columbus, US
• Darwin Argumedo · Columbus, US
• Aaron Frank · Sachse, US
• Christopher Gordon Scheitlin · Columbus, US
• Michael M. Miller · Powell, US

Key dates

• Filing date: Jun 29, 2020
• Grant date: Aug 2, 2022
• Expiry date: Jun 29, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2301/066
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.