PROCESS FOR PREPARING ACETIC ACID, AND CATALYST SYSTEM FOR PREPARING ACETIC ACID

摘要

FIELD: organic chemistry. SUBSTANCE: process for preparing acetic acid by carbonylation of methanol or reactive derivative thereof by reacting methanol or derivative thereof with carbon monoxide in liquid reaction system containing (a) acetic acid, (b) iradium catalyst, (c) methyl iodide, (d) of least final amount of water and (e) methyl acetate. The promoter includes at least one ruthenium osmium. EFFECT: improved preparation process.