凹凸棒土负载Pt催化剂的氯代硝基苯选择性加氢性能  

Selective hydrogenation performance of chloronitrobenzene to chloroaniline over HCl-acidified attapulgite-supported platinum catalyst

作　　者：赵娅敏[1] 马好文[2] 孙鲲鹏[3] 徐贤伦[3] 

机构地区：[1]西北民族大学化工学院,甘肃兰州730000 [2]中国石油天然气股份有限公司兰州化工研究中心,甘肃兰州730000 [3]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《工业催化》2015年第2期147-151,共5页Industrial Catalysis

基　　金：中央高校基本业务费专项资金项目(zyz2011064);西北民族大学引进人才教学科研启动费(xbmuyjrc201102)

摘　　要：以3 mol·L-1的HCl酸化凹凸棒土为载体,200℃还原制备负载型纳米Pt催化剂,并应用于氯代硝基苯选择加氢反应。在反应温度60℃和反应压力2.0 MPa条件下,催化剂显示出优异的加氢活性和选择性,在氯代硝基苯完全转化情况下,氯代苯胺选择性达100%,制备的催化剂具有很高的金属分散度,Pt纳米粒子粒径约2 nm,凹凸棒土载体对提高Pt分散度发挥了关键的作用,高分散纳米Pt粒子显著提高催化剂的加氢活性与氯代苯胺选择性,完全抑制了脱氯现象。Using attapulgite acidified by 3 mol·L ^- 1 HCl as the support,the supported platinum nanocom-posite catalyst was prepared by reducing at 200 ℃. The as-prepared catalyst was applied for selective hydrogenation of chloronitrobenzene. The nanocomposite catalyst exhibited excellent hydrogenation activity and selectivity under the condition of reaction temperature 60 ℃ and reaction pressure 2. 0 MPa. The selectivity to chloroaniline was up to 100% under the condition of complete conversion of chloronitro-benzene. The catalyst possessed high metal dispersion,and platinum nanoparticles had the average size of about 2 nm. The attapulgite support played a key role in the enhancement of Pt dispersion. The highly dispersed platinum nanoparticles significantly improved the hydrogenation activity and selectivity of the catalyst,and completely suppressed hydrodechlorination.

关 键 词：精细化学工程 凹凸棒土 PT催化剂 氯代硝基苯 选择加氢 脱氯 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]