METHOD OF PRODUCTION OF ACETIC ACID BY CARBONYLATION OF DIMETHYL ETHER Russian patent published in 2002 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to production of acetic acid. Method is performed by interaction of carbon monoxide with a mixture of dimethyl ether with methanol and/or methyl acetate as a carbonylable reagent. Amount of dimethyl ether is from 30 to 100 weight %. Carbonylable reagent is added in reactor where liquid reaction mixture containing a catalyst based on metal of VIII group, methyl iodide promoter, optional copromoter and water is kept at the enhanced temperature. Water concentration in liquid reaction mixture is maintained from 1 to 10 weight %. EFFECT: increased rate of carbonylation using dimethyl ether as raw. 10 cl, 4 tbl