Novel effective poly(2,2′-bipyridine-5,5′-diyl)-CuCl2 catalyst for synthesis of dimethyl carbonate (DMC) by oxidative carbonylation of methanol

Reaction of dibutyltin oxide with methanol under CO2 pressure relevant to catalytic dimethyl carbonate synthesis

“…Several processes have been proposed to industrially synthesize DMC [6]: (1) reaction of phosgene with methanol, (2) reaction of carbon monoxide with methanol in the presence of oxygen (oxidative carbonylation) [7], (3) reaction of ethylene oxide with CO 2 to produce ethylene carbonate, and a subsequent ester exchange with methanol, and (4) direct dehydrative condensation of carbon dioxide with methanol (Eq. (1)) [8,9].…”

Carbon dioxide: a renewable feedstock for the synthesis of fine and bulk chemicals

“…Dimethyl carbonate has gained considerable interest due to its versatile chemical reactivity and unique physical properties like high oxygen content, lower toxicity and excellent biodegradability [141,142]. It has applications such as potential fuel additive, as an alternative to toxic carbonylation/methylation agent in organic synthesis and as an important intermediate for polycarbonate resins [143,144].…”

“…The influence of reaction time on the transesterification reaction was attempted and it was observed that conversion of EC and yield of DMC/EG increases with time and higher conversion of EC (96%) was obtained at 4 h and it remains constant with further increase in the reaction time. In earlier studies it has been indicated that improvement in the yield of DMC as well as on the mass balance for the transesterification reaction was observed in the presence of CO 2 pressure [141,169]. Hence, in order to study the effect of CO 2 on the yield of DMC, it has been observed that the CO 2 pressure does not have significant influence on the conversion of EC and yield of DMC/EG.…”

Oxidative carbonylation of methanol over copper ion-containing ionic liquids immobilized on SBA-15

“…The synthesis of DMC by the oxidative carbonylation of methanol using a slurry CuCl catalyst in the liquid phase was firstly commercialized by Enichem in 1983. Since this process suffers from equipment corrosion, catalyst deactivation, and difficulties in product separation, a number of efficient homogeneous complex catalysts and copper salts catalysts immobilized on inorganic or organic solid materials have been extensively investigated in order to solve these problems [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. For example, Raab and coworkers found that catalyst complexes with three or four N-methylimidazole ligands at Cu + / 2+ could increase both the conversion of methanol and the selectivity to DMC in comparison to the plain copper halides, whereas corrosion of the stainless steel reactors was efficiently inhibited [7].…”

“…For example, Raab and coworkers found that catalyst complexes with three or four N-methylimidazole ligands at Cu + / 2+ could increase both the conversion of methanol and the selectivity to DMC in comparison to the plain copper halides, whereas corrosion of the stainless steel reactors was efficiently inhibited [7]. Sato et al investigated the performance of heterogenized CuCl 2 catalysts supported on polymers containing N-donor ligand aromatics and found that those catalysts could be easily recovered, and the initial catalytic activity was maintained after three recycle [12][13][14][15]. Cao et al found CuCl immobilized on diamide modified mesoporous materials exhibited high activity and selectivity in the oxidative carbonylation of methanol [16].…”