Method of forming an inorganic oxide coating on a monolith article
AssigneeJohnson Matthey Public Limited Company
InventorsLucy CLOWES, Alexander Nicholas Michael GREEN, John TURNER, Sarah WARREN
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Abstract
A method of forming an inorganic oxide coating on a monolith article is disclosed. The coated monolith article is suitable for the treatment of an exhaust gas. The method comprises spraying, as a dry particulate aerosol, inorganic particles comprising an aluminosilicate zeolite having a SAR of greater than 100:1 and a silicone resin to form a coating layer. The present invention also provides an uncalcined porous monolith article for use in forming a monolith article for the treatment of an exhaust gas. The uncalcined monolith article comprises a dry particulate composition comprising inorganic particles and a silicone resin.
Claims17
A method of forming an inorganic oxide coating on a monolith article for the treatment of an exhaust gas, the method comprising:
- providing a porous monolith article comprising a plurality of channels for the passage of an exhaust gas, each channel having a gas-contacting surface;
- spraying onto the gas-contacting surface, as a dry particulate aerosol, inorganic particles comprising an aluminosilicate zeolite having a silica-to-alumina molar ratio (SAR) of greater than 100:1 and a silicone resin to form a coating layer;
- and
- calcining the coating layer to provide a coated monolith article.
An uncalcined porous monolith article for use in forming a monolith article for the treatment of an exhaust gas, the uncalcined porous monolith article comprising a plurality of channels and comprising a dry particulate composition comprising inorganic particles comprising an aluminosilicate zeolite having a SAR of greater than 100:1 and a silicone resin, the dry particulate composition being located within the channels and/or pores of said uncalcined porous monolith.
An uncalcined porous monolith article for use in forming a monolith article for the treatment of an exhaust gas, the monolith article obtainable by a method comprising:
- providing a porous monolith article comprising a plurality of channels for the passage of an exhaust gas, each channel having a gas-contacting surface;
- spraying onto the gas-contacting surface, as a dry particulate aerosol, inorganic particles comprising an aluminosilicate zeolite having a SAR of greater than 100:1 and a silicone resin to form a coating layer.
Dependencies are inferred from the claim text.