Patent ID: 7678939
Filing Date: 2010-03-16
Classification: C07C

Abstract:
1. A process for the production of acetic acid, by a catalytic carbonylation reaction, comprising reacting a compound selected from the group consisting of an alkyl alcohol and reactive derivatives thereof in a reaction mixture, in the presence of carbon monoxide and a rhodium-based catalyst system comprising: (i) rhodium; (ii) a halogen promoter; (iii) an iodide salt co-promoter at a concentration that generates an iodide ion concentration of greater than about 3 weight % of the reaction mixture; and (iv) a ruthenium or tin catalyst stabilizer or mixture thereof; wherein the reaction mixture comprises from about 0.1 weight % to about 14 weight % water, and wherein the ruthenium catalyst stabilizer, the tin catalyst stabilizer, or mixtures thereof are present in a molar ratio of combined ruthenium and tin to rhodium in the reaction mixture of from 5:1 to about 20:1.