Method Of Reusing Pfas Contaminated Material, In Particular Clay, Clay Sludge And Clay-Like Material, By Conversion Into Ceramic Material
Patent No. EP3970870 (titled "Method Of Reusing Pfas Contaminated Material, In Particular Clay, Clay Sludge And Clay-Like Material, By Conversion Into Ceramic Material") was filed by Bensdorp on Sep 17, 2021. The application was issued on Oct 29, 2025.
Patent Summary
This invention provides a method for reusing PFAS-contaminated material, specifically clay, clay sludge, and clay-containing materials, by converting them into ceramic products through heating. Unlike thermal cleaning, this process utilizes a slower firing curve and extended heating periods—exceeding 4 hours, preferably 12 to 24 hours—to prevent product damage and ensure PFAS removal via evaporation or combustion. The material is heated above the quartz transformation temperature (typically 500°C–600°C), potentially reaching 1000°C–1500°C, reducing PFAS content by over 95% (preferably >99%). The method may include forming the material into desired shapes using moulds, either alone or mixed with other clays/auxiliaries, prior to heating, thereby simultaneously achieving PFAS destruction and ceramic fabrication.
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Date
Description
EP3970870
- Application Number
- EP21197485A
- Filing Date
- Sep 17, 2021
- Status
- Granted And Under Opposition
- Sep 26, 2025
- Publication Date
- Oct 29, 2025
- External Links
- Slate, Register , Google Patents