Process for purifying and recovering contaminated catalyst solut

Details Process for purifying and recovering contaminated catalyst solut Process for purifying and recovering contaminated catalyst solut

1982-08-04

1985-12-03

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,...

260546, 260549, 560232, 562517, 562607, B01J 3140, C07C 5156, C07C 5154, C07C 6737

Patent

active

045566445

ABSTRACT:
The disclosure relates to a process for purifying and recovering a contaminated catalyst solution which is obtained in the carbonylation of methyl acetate and/or dimethylether, the catalyst solution containing carbonyl complexes of noble metals of group VIII of the Periodic System of the elements, quaternary heterocyclic aromatic nitrogen compounds or quaternary organophosphorus compounds as organic promoters, and optionally compounds of carbonyl-yielding common metals as inorganic promoters, undistillable organic contaminants as well as acetic acid, acetic anhydride and ethylidene diacetate. To this end, the disclosure provides for the catalyst solution to be distillatively freed from its volatile constituents and for the remaining solid distillation residue to be freed from the organic contaminants by extraction with aliphatic ethers; and for the remaining undissolved mixture of noble metal/carbonyl-complex, organic and optionally inorganic promoters to be filtered off and recycled into the carbonylation reaction.

REFERENCES:
patent: 4013583 (1977-03-01), Knifton
patent: 4252983 (1981-02-01), Erpenbach et al.
patent: 4333884 (1982-06-01), Kubbeler et al.
patent: 4476237 (1984-10-01), Porcelli
patent: 4476238 (1984-10-01), Palmer et al.

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