Modified aluminas and the use thereof in FCC catalysts
AssigneeAkzo Nobel N.V.
InventorJose Carlos Duarte Macedo
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Abstract
A modified alumina is useful as metals passivator in fluidizable catalytic cracking catalysts. The modified alumina is prepared from a hydrated alumina, e.g., gibbsite, which is reacted with a low-molecular weight organic acid, e.g., acetic acid, forming aluminum salts. Calcination of the modified alumina results in decomposition of the aluminum salt.
Claims5
A process for preparing a modified alumina comprising a step of contacting a hydrated alumina at a temperature in the range of from about 25° to about 110° C. for a period in the range of from about 1 to about 100 hours with an aqueous solution of a monocarboxylic acid having from 1 to about 3 carbon atoms, the end pH being about 4 or less, and isolating, washing until there is no longer any remaining acid and drying the solid reaction product.
Dependencies are inferred from the claim text.