Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (09): 2141-2147.doi: 10.3866/PKU.WHXB201206201

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

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).

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