Process for recovery of cobalt and manganese for oxidation residue incinerator ash
AssigneeAmoco Corporation
InventorsJuergen K. Holzhauer, Dennis J. Michalak, Wayne P. Schammel
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Abstract
A process is disclosed for recovery of cobalt and manganese, and other metals, in the form of their acetate salts, directly from mixed metal oxides present in oxidation residue incinerator ash comprising fly ash and clinkers from incineration of a residue from manufacture of benzene di- and tricarboxylic acids by catalytic means. These acetate salts are recycled directly for manufacture of benzene di- and tricarboxylic acids after recovery.
Claims9
A process for the recovery of cobalt and manganese from aromatic acid oxidation incinerator ash which process comprises heating said oxidation incinerator ash in the presence of acetic acid and a reducing agent present by addition to said process wherein the weight ratio of acetic acid to said oxidation incinerator ash is from about 1:1 to about 50:1, and the ratio of electrons which said reducing agent can deliver to atoms of said cobalt plus manganese in said oxidation incinerator ash is from about 0.1:1 to about 4:1 at about the boiling point of said acetic acid at atmospheric pressure and recovering said cobalt and manganese in liquid solution as the metal acetic acid salt.
Dependencies are inferred from the claim text.