| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an improved iridium-catalysed promoted carbonylation process in which catalyst and promoter losses are prevented or retarded.SOLUTION: There is provided a method for the production of acetic acid by carbonylating methanol and/or a reactive derivative thereof with carbon monoxide in a carbonylation reactor containing a liquid reaction composition comprising: an iridium carbonylation catalyst; methyl iodide co-catalyst; a finite concentration of water; acetic acid; methyl acetate; at least one promoter selected from ruthenium, osmium and rhenium; and a stabilizing compound selected from the group consisting of alkali metal iodides, alkaline earth metal iodides, metal complexes capable of generating I-, salts capable of generating I-, and mixtures of two or more thereof. In the method, the molar ratio of the promoter to the iridium is greater than 2:1, and the molar ratio of the stabilizing compound to the iridium is in the range of [greater than 0 to 5]:1.</p> |
