论文部分内容阅读
The production of octahydrocoumarin,which can serve as a replacement for toxic coumarin,was investigated using 5% Ru on active carbon(Ru/C) as the catalyst for the hydrogenation of coumarin. The hydrogenation was studied by optimizing the reaction conditions(pressure,solvent and coumarin concentration). The activity and selectivity of the Ru/C catalyst were compared for different solvents. The mechanism of coumarin hydrogenation was deduced. The formation of side products was explained. The optimal hydrogenation reaction conditions were: 130 °C,10 MPa,60 wt% coumarin in methanol,and 0.5 wt%(based on coumarin) of Ru/C catalyst. At the complete conversion of coumarin,the selectivity to the desired product was 90%.
The production of octahydrocoumarin, which can serve as a replacement for toxic coumarin, was investigated using a 5% Ru on active carbon (Ru / C) as the catalyst for the hydrogenation of coumarin. The hydrogenation was studied by optimizing the reaction conditions (pressure, The activity and selectivity of the Ru / C catalyst were compared for different solvents. The mechanism of coumarin hydrogenation was deduced. The formation of side products was explained. The optimal hydrogenation reaction conditions were: 130 ° C, 10 MPa, 60 wt% coumarin in methanol, and 0.5 wt% (based on coumarin) of Ru / C catalyst. At the complete conversion of coumarin, the selectivity to the desired product was 90%.