METHOD FOR PRODUCTION OF ACETIC ACID VIA CARBONYLATION OF METHANOL AND/OR ITS REACTIVE DERIVATIVE Russian patent published in 2002 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: carbonylation is carried out in reactor containing liquid reaction mixture. The latter includes iridium carbonylation catalyst and methyl iodide cocatalyst, water in limited concentrations, acetic acid, methyl acetate, at least one promoter and copromoter selected from alkali and alkali-earth metal iodides, iodide anion-releasing metal-containing complexes and salts or their mixtures. Concentration of water is equal to or below carbonylation maximum concentration. EFFECT: reduced expenses and simplified acetic acid isolation. 20 cl, 5 dwg, 7 tbl, 14 ex