Structural feature and catalytic performance of Cu—SiO2—TiO2 cogelled xerogel catalysts for oxidative carbonylation of methanol to dimethyl carbonate

摘要

Cu—SiO2—TiO2 cogelled xerogel catalysts were prepared, characterized and tested for oxidative carbonylation of methanol to dimethyl carbonate (DMC). The catalyst with 12.5 mol% of Cu loading shows better catalytic performance and reduced corrosion as compared with the Cud catalytic system, which is attributed to highly dispersed Cu~+ active centers as well as lower chloride content. Further copper loading resulted in loss of copper during the preparation of the catalyst and decreased catalytic activity in DMC synthesis.