Method for the manufacture of a catalytic filter

EP4747005A1Pending Publication Date: 2026-05-27JOHNSON MATTHEY PLC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
JOHNSON MATTHEY PLC
Filing Date
2024-07-17
Publication Date
2026-05-27

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Abstract

A method for the manufacture of a catalytic filter for an exhaust gas treatment system comprises: i) providing a porous filter body; ii) providing a washcoat comprising: (a) one or more platinum group metals (PGM); (b) a support material; and (c) a surfactant; iii) coating the filter body with the washcoat to form a coated filter body; and iv) calcining the coated filter body to form the catalytic filter, and wherein the surfactant is a non-ionic, silicon-free, organic surfactant.
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