Preparation of bromine-containing copper-organic coordination compound and its catalytic performance in oxidative carbonylation of methanol

A bromine-containing copper-organic coordination compound was prepared by the reaction of tetrrpropylammonium bromide with copper bromide in ethyl acetate solution. The compound obtained was characterized with FTIR, XRD, ICP-AES and EA. Meanwhile, its catalytic performance for the oxidative carbonylation of methanol was investigated. The results showed that the introduction of ligand could change the density of copper electron cloud, which improved the redox property for the oxidative carbonylation of methanol to prepare dimethyl carbonate. In the presence of strong base and weak acid salts, the per pass conversion of methanol could reach 57% under the reaction conditions of temperature 383 K, pressure 3.5 MPa, and the mass concentration of catalyst in methanol 0.20 g·ml^-1.