B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/87
B01J 23/96 (2006.01) B01J 31/40 (2006.01) C07C 51/42 (2006.01) C07C 51/573 (2006.01)
Patent
CA 1173020
PROCESS FOR PURIFYING AND RECOVERING CONTAMINATED CATALYST SOLUTION OBTAINED IN THE CARBONYLATION OF METHYL ACETATE AND/OR DIMETHYLETHER ABSTRACT OF THE DISCLOSURE The disclosure relates to a process for purifying and recovering a contaminated catalyst solution which is ob- tained in the carbonylation of methyl acetate and/or di- methylether, the catalyst solution containing carbonyl com- plexes of noble metals of group VIII of the Periodic System of the elements, quaternary heterocyclic aromatic nitrogen compounds or quaternary organophosphorus compounds as orga- nic promoters, undistillable organic contaminants as well as acetic acid, acetic anhydride and ethylidene diacetate. To this end, the disclosure provides for the catalyst solu- tion to be distillatively freed from its volatile consti- tuents and for the remaining solid distillation residue to be water-treated, the noble metal/carbonyl-complex being precipitated together with the organic contaminants and the organic promoter becoming dissolved; for the precipi- tated and contaminated noble metal/carbonyl-complex to be removed by filtration and for the noble metal to be re- covered therefrom in known fashion; for the organic pro- moter to be recovered by evaporating the water or extract- ing it with halogenated hydrocarbons and for these latter to be evaporated.
410225
Erpenbach Heinz
Gehrmann Klaus
Lork Winfried
Prinz Peter
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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