Dual demetalling of oxo products with catalyst recycle

Details Dual demetalling of oxo products with catalyst recycle Dual demetalling of oxo products with catalyst recycle

1979-07-20

1981-03-10

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252414, 568454, 568882, 568909, B01J 3140, C07C 2722, C07C 2916, C07C 4550

Patent

active

042552796

ABSTRACT:
This invention relates to a process for dual demetalling of an oxo product contaminated with cobalt-containing catalyst residues and recovering catalytically active cobalt carbonyls which comprises treating the oxo product in a first zone with an aqueous solution of a cobalt salt of an organic or inorganic acid to extract cobalt carbonyl partially from the oxo product into the aqueous phase containing Co.sup.++ ions to form Co[Co(CO).sub.4 ].sub.2 therein and in a second zone substantially completing the demetalling of the thus treated oxo product by treatment with an aqueous organic or inorganic acid in the presence of air or oxygen to form a Co.sup.++ salt and using the resulting aqueous solution as feed to the first zone; subjecting the aqueous phase obtained from the first zone to preforming in a high pressure preformer under synthesis gas to convert any excess or residual Co.sup.++ salt contained in said aqueous phase to Co[Co(CO).sub.4 ].sub.2 and extracting cobalt carbonyls from the aqueous phase with an organic solvent, the organic solvent extract being recycled to the oxo reactors as catalyst.

REFERENCES:
patent: 2744936 (1956-05-01), Mertzweiller
patent: 2751403 (1956-06-01), Mertzweiller
patent: 2757205 (1956-07-01), Mertzweiller et al.
patent: 2757377 (1956-07-01), Mertzweiller et al.
patent: 2767048 (1956-10-01), Mertzweiller
patent: 2816933 (1957-12-01), Mertzweiller
patent: 3941848 (1976-03-01), Kummer et al.
patent: 3957684 (1976-05-01), Strohmeyer et al.
patent: 4061687 (1977-12-01), Kaufhold
"Organic Synthesis via Metal Carbonyls," Wender & Pino Interscience Publishers, N. Y., pp. 249-251.

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