C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/639, 260/539
C07C 19/07 (2006.01) C07C 51/56 (2006.01) C07C 51/573 (2006.01)
Patent
CA 1214472
PROCESS FOR RECOVERING IODINE COMPOUNDS FROM THE OFF-GAS OF CARBONYLATION REACTIONS ABSTRACT OF THE DISCLOSURE: The disclosure relates to a process for recovering iodine compounds from the off-gas originating from the reaction of methyl acetate and/or dimethylether with carbon monoxide and optionally hydrogen to give acetic anhydride and optionally ethylidene diacetate in the presence of a catalyst system consisting of carbonyl complexes of noble metals of group VIII of the Periodic System of the elements, an iodine compound, acetic acid, an organophosphorus or organonitrogen compound and, optionally, carbonyl-yielding compounds of common metals. The disclosure provides more especially for off-gas which is removed together with liquid reaction products to be wholly or partially subjected to countercurrent scrubbing treat- ment with methyl acetate at temperatures of -40°C up to +20°C.
410911
Erpenbach Heinz
Gehrmann Klaus
Hostermann Peter
Kohl Georg
Kubbeler Hans-Klaus
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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