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,...
Patent
1986-04-15
1986-12-16
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, 502 32, 502 33, 560232, 423 22, B01J 3140, B01J 3868, C07C 5156, C01G 5500
Patent
active
046297111
ABSTRACT:
Catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethylether, containing carbonyl complexes of rhodium, quaternary heterocyclic aromatic nitrogen compounds or quaternary organophosphorus compounds as organic promoters, undistillable organic contaminants, acetic acid, acetic anhydride and ethylidene diacetate, is purified and recovered. To this end the contaminated catalyst solution is extracted with a dialkylether having from 1-4 carbon atoms and thereby freed from its organic contaminants, acetic acid, acetic anhydride and ethylidene diacetate, and the ether phase is separated from a precipitated promoter-containing catalyst complex; the ether phase is treated with iodine and/or methyl iodide, a further portion of precipitated promoter-containing catalyst complex is separated and united with the purified catalyst complex; the ether phase is distillatively separated into its constituents, recovered dialkylether is used for extraction, and fresh catalyst solution is prepared from the recovered mixture of acetic acid, acetic anhydride and ethylidene diacetate and united purified catalyst complex, and the organic contaminants retained in the residue coming from the ether phase distillation are expelled, and the purified catalyst is distillatively freed from residual dialkylether.
REFERENCES:
patent: 4388217 (1983-06-01), Hembre et al.
patent: 4440570 (1984-04-01), Erpenbach et al.
patent: 4442304 (1984-04-01), Erpenbach et al.
patent: 4556644 (1985-12-01), Erpenbach et al.
patent: 4557760 (1985-12-01), Erpenbach et al.
Erpenbach Heinz
Gehrmann Klaus
Lork Winfried
Prinz Peter
Hoechst Aktiengesellschaft
Konopka P. E.
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