【作者】 牛立博； 曹迎迎； 白国义；

【Author】 Libo Niu;Yingying Cao;Guoyi Bai;College of Chemistry and Environmental Science, Hebei University;

【机构】 河北大学化学与环境科学学院；

【摘要】 本文以利用尿素水解法制备的镁铝水滑石(MgA l-LDH)为载体,采用浸渍还原法制备了负载型镍基纳米催化剂Ni/LDH,并将其应用于苯甲腈选择性加氢反应中,重点考察了不同溶剂对苯甲腈加氢产物选择性的影响。实验结果证明,在不同极性的溶剂中,Ni/LDH均表现出了良好的活性,苯甲腈转化率保持在96%以上;同时,溶剂极性对产物选择性产生了重要影响,在强极性的甲醇溶剂中,苄胺的选择性达到82%以上,随着溶剂极性的降低,苄胺的选择性也随之降低。此外,随着反应温度的提高,苄胺与甲醇之间的作用力减弱,从而导致苄胺的选择性略有降低。更多还原

【Abstract】 LDH was prepared by urea decomposition method and used as carrier of Ni/LDH catalyst. Ni/LDH catalysts were used in the selective hydrogenation of benzonitrile and the effect of solvent on selectivity was discussed. It was found that Ni/LDH exhibited excellent catalytic performance and the conversion of benzonitrile were all over 96% in different solvents. The selectivity of benzylamine was about 82% in methanol, which is a polarity solvent, and was decreased when the polarity of solvent decreased. The selectivity of benzylamine decreased as the reaction temperature increased, which was attributed to the weakened interaction between benzylamine and methanol.更多还原