(621en) Development of New Dmc Synthesis Process Via Vapor Phase Oxidative Carbonylation

Newly designed process for the dimethyl carbonate (DMC) synthesis via vapor phase oxidative carbonylation has been developed. The catalytic reactions were studied under various experimental conditions at a continuous reactor (fixed bed) and a batch reaction (autoclave). The goal of this work is to establish the effects of anions containing copper compound and pore structure of catalytic supports. In this study, CuCl and CuCl2 were used as sources of Cu+ or Cu2+ ions. Alumina, zeolites, ceria, and MOFs were introduced as adsorptive and catalytic supports. The catalytic reaction was carried out at various temperature (373-523 K) and pressure (0.1-2.5 MPa) conditions with fixed bed reactor. The obtained vapor mixture with DMC, MeOH, CO, O2 and CO2 were analyzed by an on-line GC (GC6890 with 6 port valve system) equipped with a flame ionization detector (FID). The condensed liquid was also collected and analyzed by same GC with auto injecting system to confirm the DMC formation in the reaction system. Newly developed reaction pathways were applied. The optical, physical, and chemical characteristics of synthesized catalysts were analyzed using BET, XRD, SEM, EDX, and TGA before and after reaction and breakthrough tests.