Stable slurries of catalytically active materials
AssigneeEngelhard Corporation
InventorsJeffrey B. Hoke, Fred M. Allen, Patrick W. Blosser, Zhicheng Hu, Ronald M. Heck
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Abstract
A method and apparatus for treating the atmosphere comprising moving a vehicle through the atmosphere, the vehicle having at least one atmosphere contacting surface and a pollutant treating composition located on said surface. A specific embodiment comprises coating a motor vehicle radiator with pollutant treating catalyst.
Claims28
A method of applying a mixture to a substrate comprising the steps of:
- forming a mixture comprising water and a particulate catalytically-active material, the catalytically-active material comprising a manganese component having a BET N2 surface area of greater than 150 m2/g, and wherein approximately 90% of the particles are less than 8 micrometers;
- adding to the mixture a dispersant comprising a compound selected from the group consisting of a polymer containing carboxylic acid groups, an ester of the polymer and a salt of the polymer;
- adding to the mixture a polymeric binder selected from the group consisting of an acrylic polymer and a poly(vinyl) acetate;
- and
- after adding the dispersant and polymeric binder, applying the mixture to a motor vehicle contacting surface.
A method of forming a slurry comprising the steps of:
- forming a mixture comprising water and a particulate catalytically-active material, the catalytically-active material comprising a manganese component having a BET N2 surface area of greater than 150 m2/g, and wherein approximately 90% of the particles are less than 8 micrometers;
- adding to the mixture a dispersant comprising a compound selected from the group consisting of a polymer containing carboxylic acid groups, an ester of the polymer and a salt of the polymer;
- and
- adding to the mixture a polymeric binder selected from the group consisting of an acrylic polymer and a poly(vinyl) acetate.
The method as recited in claim 48 wherein the MnO2 is α-MnO2.
A catalytic slurry for adhering to a substrate comprising:
- a particulate catalytically-active material comprising a manganese component having a BET N2 surface area of greater than 150 m2/g, and wherein approximately 90% of the particles are less than 8 micrometers;
- a dispersant comprising a compound selected from the group consisting of a polymer containing carboxylic acid groups, an ester of the polymer and a salt of the polymer;
- a polymeric binder selected from the group consisting of an acrylic polymer and a poly(vinyl) acetate;
- and
- water.
Dependencies are inferred from the claim text.