C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/574, 260/641
C07C 47/02 (2006.01) B01J 31/40 (2006.01) C07C 29/16 (2006.01) C07C 29/86 (2006.01) C07C 29/88 (2006.01) C07C 45/50 (2006.01)
Patent
CA 1133514
ABSTRACT OF THE DISCLOSURE 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++ ions to form Co[Co(CO)4]2 therein and in a second zone substantially completing the demetalling of the thus treated oxo product by treat- ment with an aqueous organic or inorganic acid in the presence of air or oxygen to form a Co++ 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++ salt contained in said aqueous phase to Co[Co(CO)4]2 and extracting cobalt carbonyls from the aqueous phase with an organic solvent, the organic solvent extract being recycled to the oxo re- actors as catalyst.
352568
Ellsworth Paul A.
Lyford John IV
Spohn Ralph J.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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