Separation of cobalt and manganese from trimellitic acid process

Details Separation of cobalt and manganese from trimellitic acid process Separation of cobalt and manganese from trimellitic acid process

1980-12-19

1981-11-03

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423140, 423150, 423151, 75119, 562414, C01G 4506, C01G 5108

Patent

active

042985803

ABSTRACT:
Recovery of cobalt and manganese from residue of trimellitic acid manufacture and recovery as 4-carboxy-phthalic anhydride by extracting the residue with an aqueous alkaline solution containing carbonate ions which leaves a precipitate of metal carbonates, dissolving said precipitate as the metal chlorides, and at an upwardly adjusted pH adding powdered manganese to precipitate metallic cobalt and separating it by magnetic means.

REFERENCES:
patent: 2865708 (1958-12-01), Dinsmore
patent: 3341470 (1967-09-01), Hensley
patent: 3673154 (1972-06-01), Trevillyan
patent: 3865871 (1975-02-01), Horie
patent: 3873468 (1975-03-01), Kobinata
patent: 3880920 (1975-04-01), Wampfler
patent: 3956175 (1976-05-01), Shigeyasu

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