Alkaline earth metal spinels and processes for making

Abstract

A process for the production of an alkaline earth metal, aluminum-containing spinel composition comprises: (a) combining (1) an acidic, aluminum-containing composition in which the aluminum is present in a positively charged species, and (2) a basic, alkaline earth metal-containing composition to form a mixture; and (b) calcining the mixture to form the alkaline earth metal, aluminum-containing spinel composition. Alkaline earth metal, aluminum-containing spinels having both high surface areas and high attrition resistance, and processes for using spinel compositions, e.g., as sulfur oxide and nitrogen oxide removal agent, are also disclosed.

Dependencies are inferred from the claim text.