Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1980-10-01
1982-01-19
Howard, Jacqueline V.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75109, 75119, 423140, C22B 300
Patent
active
043115217
ABSTRACT:
Precipitation-free recovery of catalyst metal content of residue from manufacture of trimellitic acid by oxidation with source of molecular oxygen of liquid pseudocumene in presence of cobalt and manganese, cobalt, manganese and cerium, followed by removal of trimellitic acid or its anhydride and, if used, reaction solvent and then separating manganese from the recovered metals. The foregoing is accomplished by extraction of such residue with water, contacting the resulting aqueous extract solution or suspension of insolubles in the aqueous solution with one side of a cation permeable fluoropolymer membrane whose other side is in contact with a hydrohalidic acid to permit metal ions to pass through the membrane, removing the hydrohalidic solution of the catalyst metals, and then after a pH adjustment adding metallic manganese to precipitate cobalt as metal.
REFERENCES:
patent: 3454490 (1969-07-01), Wallace
patent: 3718583 (1973-02-01), Wu et al.
patent: 3940470 (1976-02-01), Kane et al.
patent: 3957504 (1976-05-01), Win-Sow Ho et al.
patent: 4051230 (1977-09-01), Miyauchi
Harper Jon J.
Pietsch Stephen J.
Ahlers Fred R.
Howard Jacqueline V.
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
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