Study on Ru/ZrO2 Catalyzed Reductive Amination of Cyclohexanone to Cyclohexylamine
1. College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China;
2. International Sakharov Environmental Institute, Belarusian State University, Minsk 220070, Republic of Belarus
Abstract：The performance of Ru/ZrO2 prepared by impregnation method was evaluated by reduction amination of cyclohexanone to cyclohexylamine. The catalysts were characterized by X-ray diffraction (XRD) and temperature-programmed desorption of ammonia (NH3-TPD). And their particle size distributions were also measured. The effects of Ru loading amount, catalyst reduction temperature, hydrogen pressure and reaction time on catalyst activity were investigated. The experimental results showed that Ru particles were highly dispersed on the surface of ZrO2. The particle size of the catalyst increased with the increase of Ru loading, and large particle size was unfavorable to the dispersion of the catalyst in the reaction system. The surface acidity of catalyst decreased with the increase of reduction temperature, and both lower and higher reduction temperature would lead to the decline of the selectivity to cyclohexylamine. The optimum Ru loading content of the catalyst was 5%, and the optimum reduction temperature of the catalyst was 150 ℃. Under the optimized reaction conditions (catalyst 0.05 g, cyclohexanone 2.94 g, ethanol 5 mL, ammonia 45 mL, hydrogen pressure 2 MPa, reaction temperature 95 ℃, reaction time 2.25 h), the conversion of cyclohexanone could reach 100%, the selectivity of cyclohexylamine could reach 90.0%, which is promising for industrial application.
HUANG Longjun1,BAO Jiahao1,GUO Luyao1 et al. Study on Ru/ZrO2 Catalyzed Reductive Amination of Cyclohexanone to Cyclohexylamine[J]. 化学反应工程与工艺, 2019, 35(3): 274-281.
