One-pot synthesis of dimethyl carbonate catalyzed by two-component supported ionic liquid catalysts

Abstract

Dimethyl carbonate (DMC), a green chemical, plays a pivotal role in the advancement of green chemistry. Among the various approaches for its synthesis, utilizing carbon dioxide (CO₂) has garnered significant attention due to its dual benefits of CO₂ utilization and sustainable production. In this study, two heterogeneous supported ionic liquid catalysts, IL-NH₂-MIL-101(Cr) and DBUIM-MCM-41, were synthesized via a chemical grafting method. These catalysts demonstrated outstanding performance in the one-pot synthesis of DMC from CO₂, propylene oxide (PO), and methanol, achieving 100% PO conversion and a 54% DMC yield under solvent-free and optimal reaction conditions. The catalysts exhibited excellent stability, and recyclability. A notable synergistic interaction between the supports and ionic liquids was observed, contributing to the enhanced efficiency of the one-pot DMC synthesis.