Method for removing hydroformylation catalyst

Patent · Tue Aug 17 04:00:00 EDT 1993

OSTI ID:6236906

Summerlin, W H

A method is described for removing Co values from the crude product of a Co-catalyzed hydroformylation reaction formed from an olefinic feedstock, which comprises: (a) contacting the crude product with a stream of oxygen containing gas, an organic acid selected from the group consisting of: formic acid, acetic acid, propionic acid, and other acids having a boiling point approximately the same as water such that appreciable values of acid can be recovered in step (d), and water thereby producing a substantially Co-free organic hydroformylation reaction product and a water soluble Co salt aqueous product; (b) separating the Co-free crude product from the water soluble Co salt aqueous product; (c) diverting the Co-free organic hydroformylation reaction product for further downstream treatment such as distillation or hydrogenation; (d) concentrating the water soluble Co salt aqueous product thereby producing a concentrated aqueous solution of Co salt and a Co-free water containing the organic acid; (e) recycling the substantially Co-free water containing the organic acid to step (a); (f) contacting the concentrated aqueous solution of Co salt with an alcohol stream and synthesis gas, and passing this mixture to a preformer reactor where the concentrated aqueous solution of Co salt is converted to a Co carbonyl; (g) contacting the Co carbonyl with a stream of stripping gas to entrain volatile Co compounds in the stripping gas and to generate as bottoms alcohol products and dissolved Co salts, whereby the entrained volatile Co compounds are taken out overhead and the alcohol products and dissolved Co salts are taken out as bottoms; (h) separating the alcohol products of step (g) from the dissolved Co salts; (i) recycling the alcohol product from step (h) to step (f); (j) recycling the dissolved Co salts from step (h) to step (a); and (k) contacting the Co compounds from step (g) with the olefinic feedstock, whereby the Co compounds are absorbed.

• Assignee: Exxon Chemical Patents Inc., Linden, NJ (United States)
• Patent Number(s): A; US 5237105
• Application Number: PPN: US 7-891341
• OSTI ID: 6236906
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACYLATION
ADSORPTION
ALCOHOLS
ALKENES
AQUEOUS SOLUTIONS
CATALYSTS
CHEMICAL REACTIONS
COBALT COMPOUNDS
DISPERSIONS
DISTILLATION
ELEMENTS
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
MANAGEMENT
MATERIALS RECOVERY
MIXTURES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN
PROCESSING
SEPARATION PROCESSES
SOLUTIONS
SORPTION
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING