Study on hydrogenation of acetophenone catalyzed by SiO_2 supported chitosan Schiff-base palladium catalyst

A catalyst,the SiO2 supported chitosan Schiff-base palladium complex,had been synthesized and characterized by IR and XRD,and the catalytic activity of this catalyst in hydrogenation reaction of acetophenone was also studied.The effects of the reaction time,reaction temperature,dosage of catalyst,and solvent species on hydrogenation reaction of acetophenone were also investigated.The results indicated that this catalyst exhibited excellent hydrogenation catalytic activity and high ethylbenzene selectivity.An 100% conversion of acetophenone and 100% selectivity towards ethylbenzene were obtained under the following conditions:The hydrogenation reaction of 0.5 mL of acetophenone over 0.2 g catalyst was conducted at atmospheric pressure and 313 K for 5 h in ethanol solvent using hydrogen as the reducing agent.