2-甲基哌嗪合成催化剂的筛选与表征  

SELECTION AND CHARACTERIZATION OF THE CATALYSTS FOR SYNTHESIS OF 2-METHYLPIPERAZINE

作　　者：于海军[1] 白国义[2] 陈立功[3] 李阳[3] 

机构地区：[1]石家庄职业技术学院化工系,河北石家庄050081 [2]河北大学化学与环境科学学院,河北保定071002 [3]天津大学化工学院,天津300072

出　　处：《精细石油化工》2009年第1期1-4,共4页Speciality Petrochemicals

基　　金：国家自然科学基金(20376057);河北省自然科学基金(B2007000156)。

摘　　要：制备了一系列的铜基和镍基催化剂,用于以N-β-羟丙基乙二胺为原料的2-甲基哌嗪的连续化合成反应,经筛选得到了Cu-Cr-Fe/γAl_2O_3催化剂[w(Cu)=20%,w(Cr)=1 0%,w(Fe)=5%]。在温度205℃、氢压为2.6 MPa的最佳反应条件下,N-β-羟丙基乙二胺的转化率达99%以上,2甲基哌嗪的选择性达95%以上;而且在80 h的寿命实验中,2-甲基哌嗪的收率保持在93%以上。采用XRD、XPS、TEM对催化剂进行了表征,提出单质铜是催化剂的活性中心,且活性组分铬和铁的添加能够有效分散催化剂表面的铜,从而提高了催化剂的活性和稳定性。The co hydroxy-propyl）- lysts were pr was found to 99% and the epar be US ethylene ed and t the best selectivity to 2-methylpiperazine was above 95% under the optimum reaction conditions.reaction temperature 205℃ and hydrogen pressure 2. 6 MPa. The yield of 2-methylpiperazine remained above 93% after 80 h stability test. The catalysts were characterized by XRD, XPS and TEM. Cu° is believed to be the active site of the catalysts. It was found that the copper on the surface of the catalyst can be highly dispersed by the addition of chromium and iron, which improves the catalyst activity and stability.

关 键 词：2-甲基哌嗪 N-β-羟丙基乙二胺 Cu—Cr-Fe/γ-Al2O3 催化剂 表征 

分 类 号：TQ254[化学工程—有机化工]