Methods for reprocessing cobalt catalysts used in hydrocarboxyla

Details Methods for reprocessing cobalt catalysts used in hydrocarboxyla Methods for reprocessing cobalt catalysts used in hydrocarboxyla

1983-07-25

1985-06-04

Konopka, P. E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Treating with a liquid or treating in a liquid phase,...

75 05A, 75119, 260410, 2604106, 2604109R, 423139, 502 28, 502 53, 560233, B01J 3140, C07C 6738, C11C 302, C09F 508

Patent

active

045215260

ABSTRACT:
The catalytic cobalt compound used in the reaction of olefins with carbon monoxide and water or alkanols which employs an oxidizing treatment is reprocessed according to the present invention. This reprocessing includes in a first embodiment treating the cobaltic residue obtained as the distillation sump product with water and a carboxylic acid having 1 to 4 C atoms. The phases generated are separated and cobalt is recovered from the carboxylic acid/water phase in the form of the corresponding carboxylic acid salt. Where appropriate, the corresponding carboxylic acid salt is transformed into another carboxylic-acid salt.
A second embodiment includes the steps of hydrogenating the cobalt containing residue obtained as the distillation sump product, separating the metallic cobalt which is obtained, reacting the metallic cobalt with an acid and where appropriate converting the cobalt salt so obtained into another cobalt salt.

REFERENCES:
patent: 4481147 (1984-11-01), Hofmann

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