ALKALINE EARTH METAL SPINEL/KAOLIN CLAYS AND PROCESSES FOR MAKING AND USING SAME

摘要

-61-ALKALINE EARTH METAL SPINEL/KAOLIN CLAYSAND PROCESSES FOR MAKINGAND USING SAMEABSTRACT OF THE DISCLOSUREA process for the production of an alkalineearth metal, aluminum-containing spinel/claycomposition comprises: (a) combining (1) an acidic,aluminum-containing composition in which thealuminum is present in a positively charged species,and (2) a basic, alkaline earth metal-containingcomposition to form a gel mixture; (b) mixing thegel with kaolin clay to form a co-gel; and (c)calcining the co-gel mixture to form the alkalineearth metal, aluminum-containing spinel compositionin a clay matrix. Alkaline earth metal,aluminum-containing spinel/clays having both highsurface areas and very high attrition resistance,and processes for using spinel/clay compostions,e.g., as sulfur oxide and nitrogen oxide removalagent, are also disclosed.D-15, 622