WO2025078786 - RECYCLING OF CATALYST COATED MEMBRANE COMPONENTS
National phase entry is expected:
Publication Number
WO/2025/078786
Publication Date
17.04.2025
International Application No.
PCT/GB2024/052292
International Filing Date
04.09.2024
Title **
[English]
RECYCLING OF CATALYST COATED MEMBRANE COMPONENTS
[French]
RECYCLAGE DES COMPOSANTS D'UNE MEMBRANE REVÊTUE DE CATALYSEUR
Applicants **
JOHNSON MATTHEY PUBLIC LIMITED COMPANY
5th Floor
2 Gresham Street
London EC2V 7AD, GB
Inventors
BASRA, Shireen Kaur
c/o Johnson Matthey
Orchard Road
Royston SG8 5HE, GB
GORDON, Ross John
c/o Johnson Matthey
Blounts Court Road
Sonning Common
Reading RG4 9NH, GB
HART, Gareth
c/o Johnson Matthey
Blounts Court Road
Sonning Common
Reading RG4 9NH, GB
MCCREE-GREY, Jonathan
c/o Johnson Matthey
Orchard Road
Royston SG8 5HE, GB
Priority Data
2315702.7
13.10.2023
GB
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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International Searching Authority |
EPO
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| Applicant's Legal Status |
Legal Entity
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| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
* |
| Translation |
|
Recalculate
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing | 1143 | |
| EPO | Filing, Examination | 4982 | |
| Japan | Filing | 591 | |
| South Korea | Filing | 575 | |
| USA | Filing, Examination | 2710 |
Total: 10001 USD
Abstract[English]
A method of recycling a waste catalyst coated membrane material comprising an ionomer membrane, at least one catalyst comprising platinum, palladium and/or ruthenium, and at least one catalyst comprising iridium, the method comprising: (a) treating the waste catalyst coated membrane material with a heated solution comprising an acid and an oxidant, wherein the platinum, palladium and/or ruthenium is leached from the waste catalyst coated membrane material into the solution which is separated from remaining solid components of the waste catalyst coated membrane material; (b) after step (a), leaching iridium from the waste catalyst coated membrane material using a heated solution comprising an acid and a reducing agent and separating the solution comprising the leached iridium from remaining solid components of the waste catalyst coated membrane material; and (c) after steps (a) and (b), treating the waste catalyst coated membrane material with a heated solvent to disperse the ionomer membrane and recover a dispersion of ionomer.[French]
L'invention concerne un procédé de recyclage d'un déchet membranaire revêtu de catalyseur comprenant une membrane ionomère, au moins un catalyseur comprenant du platine, du palladium et/ou du ruthénium, ainsi qu'au moins un catalyseur comprenant de l'iridium, le procédé comprenant les étapes consistant à : (a) traiter le déchet membranaire revêtu de catalyseur avec une solution chauffée comprenant un acide et un oxydant, le platine, le palladium et/ou le ruthénium étant lixiviés, à partir du déchet membranaire revêtu de catalyseur dans la solution qui est séparée des composants solides restants du déchet membranaire revêtu de catalyseur ; (b) après l'étape (a), lixivier l'iridium à partir du déchet membranaire revêtu de catalyseur à l'aide d'une solution chauffée comprenant un acide et un agent réducteur et séparer la solution comprenant l'iridium lixivié des composants solides restants du déchet membranaire revêtu de catalyseur ; et (c) après les étapes (a) et (b), traiter le déchet membranaire revêtu de catalyseur avec un solvant chauffé pour disperser la membrane ionomère et récupérer une dispersion d'ionomère.