WO2026087864 - A METHOD OF TREATING A PROCESS WASTE STREAM CONTAMINATED WITH FLUORINATED HYDROCARBONS
National phase entry is expected:
Publication Number
WO/2026/087864
Publication Date
30.04.2026
International Application No.
PCT/GB2025/052073
International Filing Date
22.09.2025
Title **
[English]
A METHOD OF TREATING A PROCESS WASTE STREAM CONTAMINATED WITH FLUORINATED HYDROCARBONS
[French]
PROCÉDÉ DE TRAITEMENT D'UN FLUX DE DÉCHETS DE TRAITEMENT CONTAMINÉ PAR DES HYDROCARBURES FLUORÉS
Applicants **
JOHNSON MATTHEY PUBLIC LIMITED COMPANY
Inventors
GORDON, Ross John
Priority Data
2415771.1
25.10.2024
GB
Application details
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2140 | |
| EPO | Filing, Examination, Granting | 10154 | |
| Japan | Filing, Examination, Granting | 2276 | |
| South Korea | Filing, Examination, Granting | 2322 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
21,632
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Abstract[English]
A method of treating a process waste stream contaminated with fluorinated hydrocarbons, such as per- and/or polyfluoralkyl substances (PFAS), the method comprising: adding a fluoride anion scavenger (e.g. calcium hydroxide) to the process waste stream; adding a base (e.g. sodium hydroxide or lithium hydroxide) to the process waste stream; and heating the process waste stream after addition of the fluoride anion scavenger and the base to defluorinate the fluorinated hydrocarbons liberating fluoride anions which are scavenged by the fluoride scavenger. The heating step may be performed in the presence of a platinum group metal catalyst.[French]
L'invention concerne un procédé de traitement d'un flux de déchets de traitement contaminé par des hydrocarbures fluorés, tels que des substances perfluoroalkylées et/ou polyfluoroalkylées, le procédé comprenant les étapes suivantes : ajouter un piège à anions fluorure (p. ex. de l'hydroxyde de calcium) au flux de déchets de traitement ; l'ajout d'une base (p. ex. de l'hydroxyde de sodium ou de l'hydroxyde de lithium) au flux de déchets de traitement ; et le chauffage du flux de déchets de traitement après l'ajout du piège à anions fluorure et de la base pour défluorer les hydrocarbures fluorés, libérant les anions fluorure capturés par le piège à fluorure. L'étape de chauffage peut être effectuée en présence d'un catalyseur à base de métaux du groupe du platine.