物理化学学报 >> 2012, Vol. 28 >> Issue (09): 2141-2147.doi: 10.3866/PKU.WHXB201206201

催化和表面科学 上一篇    下一篇

组合型Pt3Sn/Al2O3催化剂用于芳香硝基化合物一锅法合成N-烷基芳胺

杨芳, 许响生, 顾辉子, 陈傲昂, 严新焕   

  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
  • 收稿日期:2012-04-06 修回日期:2012-06-20 发布日期:2012-08-02
  • 通讯作者: 严新焕 E-mail:xinhuanyan139@hotmail.com
  • 基金资助:

    国家自然科学基金(21076197), 浙江省自然科学基金(Y4090440)和浙江省钱江人才项目(2010R10038)资助

Heterogeneously Catalyzed One-Pot Synthesis of N-alkyl anilines from Nitroaromatics by Assembled Pt3Sn/Al2O3 Catalyst

YANG Fang, XU Xiang-Sheng, GU Hui-Zi, CHEN Ao-Ang, YAN Xin-Huan   

  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2012-04-06 Revised:2012-06-20 Published:2012-08-02
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21076197), Natural Science Foundation of Zhejiang Province, China (Y4090440), and 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503 K, 空速为7.5 h-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.

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

Abstract:

N-alkyl anilines were obtained from nitroaromatics by a one-pot method using assembled Pt3Sn/Al2O3 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/Al2O3 catalyst), nitrobenzene conversion was 100%, with a total N-ethyl and N,N-diethyl aniline yield of 98.2%. Moreover, the Pt3Sn/Al2O3 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.

Key words: N-alkylation, In situ liquid hydrogenation, Nitroaromatic, N-alkyl aniline, Pt-Sn bimetallic catalyst

MSC2000: 

  • O643