C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/496.6, 260/5
C07C 53/08 (2006.01) C07C 51/487 (2006.01) C07C 51/573 (2006.01) C07C 53/12 (2006.01) C07C 69/16 (2006.01)
Patent
CA 1234149
PROCESS FOR SEPARATING IODINE AND ITS COMPOUNDS FROM THE CARBONYLATION PRODUCTS OBTAINED BY SUBJECTING DIMETHYL- ETHER, METHYL ACETATE OR METHANOL TO A CARBONYLATION REACTION ABSTRACT OF THE DISCLOSURE The disclosure relates to a process for separating iodine and its compounds from the carbonylation products acetic acid, acetic anhydride or ethylidene diacetate ob- tained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction. For reducing the quantity of total iodine contaminating the carbonylation products to less than 20 ppb iodine, the disclosure pro- vides for the carbonylation products to be treated at tem- peratures of 50 to 200°C with hydrogen in the presence of at least one noble metal belonging to group VIII of the Periodic System of the elements as a catalyst, and sepa- rated from the catalyst.
462141
Erpenbach Heinz
Gehrmann Klaus
Joest Herbert
Lork Winfried
Ohorodnik Alexander
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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