Method and device for cleaning the atmosphere
AssigneeEngelhard Corporation
InventorsJeffrey B. Hoke, Ronald M. Heck, Fred M. Allen
Life of this patent
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Abstract
Method for treating atmospheric pollutants by contacting the atmosphere with a catalyst composition or adsorptive material coated on the surface of a substrate in which the catalyst composition or adsorptive material is protected from degradation by harmful contaminants contained in the atmosphere by a coating of at least one porous protective material and a device useful therefor.
Claims36
A method of cleaning the atmosphere either by catalytically treating the atmosphere to convert atmospheric pollutants to less harmful materials or by adsorbing pollutants contained in the atmosphere comprising contacting the pollutant containing atmosphere with an outer surface of a substrate which has been coated with either a catalyst composition to render said surface capable of catalytically converting said atmospheric pollutants into less harmful materials or an adsorptive composition in order to render said surface capable of adsorbing said atmosphere components and protecting the catalyst and/or adsorbent coated surface with an overcoat of at least one porous protective material which is sufficiently porous to enable said atmospheric containing said pollutants to pass therethrough into operative contact with the catalyst and/or adsorbent composition and which is sufficiently protective to prevent harmful contaminants from contacting the catalyst and/or adsorbent composition.
A method of cleaning the atmosphere by catalytically treating the atmosphere to convert atmospheric pollutants to less harmful materials comprising contacting the pollutant containing atmosphere with an outer surface of a substrate which has been coated with a catalyst composition to render said surface capable of catalytically converting said atmospheric pollutants into less harmful materials and protecting the catalyst coated surface with an overcoat of at least one porous protective material which is sufficiently porous to enable said atmospheric containing said pollutants to pass therethrough into operative contact with the catalyst composition and sufficiently protective to prevent harmful contaminants from contacting the catalyst composition.
A device for cleaning the atmosphere by catalytically treating the atmosphere to convert atmospheric pollutants to harmless byproducts comprising:
- a) a substrate having a surface;
- b) a catalyst composition coated on said surface;
- and
- c) at least one porous protective material coated over the catalyst composition, said porous protective material being sufficiently porous to enable said atmosphere containing pollutants to pass therethrough into operative contact with the catalyst composition and sufficiently adsorbent to prevent harmful contaminants from contacting the catalyst composition.
A method of cleaning the atmosphere by adsorbing pollutants contained in the atmosphere comprising contacting the pollutant containing atmosphere with an outer surface of a substrate which has been coated with an adsorptive material to render said surface capable of adsorbing said atmospheric pollutants and protecting the adsorptive material coated surface with an overcoat of at least one porous protective material which is sufficiently porous to enable said atmosphere containing said pollutants to pass therethrough into operative contact with the adsorptive material and sufficiently protective to prevent harmful contaminants from contacting the adsorptive material.
A device for cleaning the atmosphere comprising:
- a) a substrate having a surface;
- b) an adsorptive material coated on said surface;
- and
- c) at least one porous protective material coated over the adsorptive material, said porous protective material being sufficiently porous to enable said atmosphere-containing pollutants to pass therethrough into operative contact with the adsorptive material and sufficiently protective to prevent harmful contaminants from contacting the adsorptive material.
Dependencies are inferred from the claim text.