Patent ID: 6800578
Filing Date: 2004-10-05
Classification: B01J,C01F,C01P

Abstract:
A process for preparing divalent metal-Al-containing anionic clays comprising peptizing boehmite in a aqueous slurry with an acid and adding a divalent metal source to said slurry in an amount that is at least stoichiometric with respect to the aluminum in said boehmite, adding a base to said slurry in an amount comprising from about 0.10 to about 0.30 moles of hydroxyl ions or equivalent thereof to moles of alumina (based on Al2O3) in said slurry, or at least the amount of base required to obtain a pH above 7 in said slurry, whichever is greater, said base being added before, during or after said divalent metal source is added, and aging said slurry.