Preparation method of dimethyl carbonate using methyl nitrite

Dimethyl carbonate(DMC) is expected to be used widely, since it is a low toxic chemical. A novel preparation method of DMC, in which DMC is prepared via methyl nitrite(MN) by the oxidative carbonylation of methanol, has been developed. This method involves two separated reactions, those are, DMC synthesis and MN synthesis. DMC is synthesized in gas phase from CO and MN over Pd(II) compound suppported catalyst with generating nitrogen monoxide (NO). The MN for DMC synthesis is synthesized from NO generated in DMC synthesis, methanol and O-2. As both of two reactions show high selectivities to DMC and RIN, respectively, DMC is actually prepared from CO, methanol and O-2. According to this method DMC is prepared with high effiency and little catalyst deactivation since neither O-2 nor H2O are present over the catalyst.