Article having a surface layer of catalytic ash by-product of coal combustion
AssigneeUniversity of Illinois Foundation
InventorsClifton G. Bergeron, Lester W. Herron
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Abstract
Disclosed are products and processes useful in catalysis of chemical reactions, especially the oxidation of organic materials. Specifically described are oxidation processes involving catalytically-active compositions derived from the admixture by smelting of certain metal oxides, or derived as an ash by-product from the combustion of coal, and which preferably include oxides of titanium, iron, magnesium and manganese as well as oxides of silicon, aluminum, calcium and potassium. Also described are substantially non-porous catalytic layers including such compositions which are useful in the manufacture of liners for "continuous cleaning" cooking devices.
Claims14
In an article of manufacture having a surface layer including means for catalytically enhancing the thermal oxidation of organic materials and a substrate for supporting the surface layer, the improvement wherein said surface layer comprises a finely divided ash by-product of the combustion of coal.
In an article of manufacture having a surface layer including means for catalytically enhancing the thermal oxidation of organic materials and a substrate for supporting the surface layer, wherein said surface layer comprises a composition consisting essentially of
- ______________________________________ Wt. % ______________________________________ SiO.sub.2 0 - 60 Al.sub.2 O.sub.3 0 - 25 TiO.sub.2 0.5 - 5 FeO 10 - 40 MgO 0.5 - 20 CaO 0 - 10 K.sub.2 O 0 - 10 MnO.sub.2 0.1 - 5 . ______________________________________
In a metallic cooking device liner wherein there is provided a surface layer including means for catalytically enhancing the thermal oxidation of organic materials in contact therewith, the improvement wherein said surface layer comprises a finely divided ash by-product of the combustion of coal.
In a metallic cooking device liner wherein there is provided a surface layer including means for catalytically enhancing the thermal oxidation of organic materials in contact therewith, the improvement wherein said surface layer comprises a composition consisting essentially of
- ______________________________________ Wt. % ______________________________________ SiO.sub.2 0 - 60 Al.sub.2 O.sub.3 0 - 25 TiO.sub.2 0.5 - 5 FeO 10 - 40 MgO 0.5 - 20 CaO 0 - 10 K.sub.2 O 0 - 10 MnO.sub.2 0.1 - 5 . ______________________________________
In the process for thermal oxidation of organic materials wherein the materials are heated in the presence of a gaseous atmosphere including oxygen and contacted with a finely divided oxidation catalyst, the improvement wherein said oxidation catalyst is a finely divided ash product of the combustion of coal.
In the process for thermal oxidation of organic materials wherein the materials are heated in the presence of a gaseous atmosphere including oxygen and contacted with a finely divided oxidation catalyst, the improvement wherein said oxidation catalyst is a composition consisting essentially of
- ______________________________________ Wt. % ______________________________________ SiO.sub.2 0 - 60 Al.sub.2 O.sub.3 0 - 25 TiO.sub.2 0.5 - 5 FeO 10 - 40 MgO 0.5 - 20 CaO 0 - 10 K.sub.2 O 0 - 10 MnO.sub.2 0.1 - 5 . ______________________________________
In an article of manufacture having a surface layer including means for catalytically enhancing the thermal oxidation of organic materials and a substrate for supporting the surface layer, the improvement wherein said surface layer is substantially non-porous.
Dependencies are inferred from the claim text.