组合型Pt_3Sn/Al_2O_3催化剂用于芳香硝基化合物一锅法合成N-烷基芳胺(英文)  

Heterogeneously Catalyzed One-Pot Synthesis of N-alkyl Anilines from Nitroaromatics by Assembled Pt_3Sn/Al_2O_3 Catalyst

作　　者：杨芳[1] 许响生[1] 顾辉子[1] 陈傲昂[1] 严新焕[1] 

机构地区：[1]浙江工业大学绿色化学合成技术国家重点实验室培育基地,杭州310014

出　　处：《物理化学学报》2012年第9期2141-2147,共7页Acta Physico-Chimica Sinica

基　　金：The project was supported by the National Natural Science Foundation of China(21076197);Natural Science Foundation of Zhejiang Province, China(Y4090440);Qianjiang Talent Program of Zhejiang Province,China(2010R10038)~~

摘　　要：采用吸附法制备了组合型Pt3Sn/Al2O3双金属催化剂,将该催化剂用于芳香硝基化合物原位液相加氢一锅法合成N-烷基芳胺.研究表明,在503K,空速为7.5h-1,水体积分数为5%时,1%(质量分数)Pt3Sn/Al2O3催化剂具有较高的催化性能,硝基苯的转化率为100%,N-乙基苯胺和N,N-二乙基苯胺的总选择性为98.2%.同时,该催化剂对原位液相加氢烷基化反应具有一定普适性,本文研究的14种芳香硝基化合物与低级脂肪醇反应,均具有较高的N-烷基化产率.N-alkyl anilines were obtained from nitroaromatics by a one-pot method using assembled Pt^Sn/AI203 catalyst for heterogeneous in situ hydrogenation in a continuous-flow fixed-bed reactor. At the optimum reaction conditions （503 K, liquid hourly space velocity （LHSV） of 7.5 h-1, 5% （volume fraction） water, 1% （mass fraction） Pt3Sn/AI203 catalyst）, nitrobenzene conversion was 100%, with a total N-ethyl and N,N-diethyl aniline yield of 98.2%. Moreover, the Pt3Sn/AI203 catalyst had a great conjoint effect for all in situ hydrogenation reactions for N-alkylation. High yields of N-alkylation products were obtained in aliphatic alcohol/water systems for 14 selected nitroaromatics.

关 键 词：N-烷基化 原位液相加氢 芳香硝基化合物 N-烷基芳胺 铂锡双金属催化剂 

分 类 号：TQ246.31[化学工程—有机化工]