Hydrogenation of nitroaromatics by polymer-anchored bimetallic palladium-ruthenium and palladium-platinum catalysts under mild conditions

被引：94

作者：

Yu, ZK ^{[1
]}

Liao, SJ ^{[1
]}

Xu, Y ^{[1
]}

Yang, B ^{[1
]}

Yu, DR ^{[1
]}

机构：

[1] CHINESE ACAD SCI,DALIAN INST CHEM PHYS,DALIAN 116023,PEOPLES R CHINA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1997年 / 120卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

nitroaromatics hydrogenation; palladium-ruthenium; palladium-platinum; polymers; aniline;

D O I：

10.1016/S1381-1169(96)00420-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polymer-anchored monometallic palladium catalyst PVP-PdCl2 (PVP = poly(N-vinyl-2-pyrrolidone)) exhibits very high activity for the hydrogenation of p-chloronitrobenzene (CNB) to aniline (AN) in the presence of base at 65 degrees C and atmospheric pressure. In this case, the substrate is rapidly hydrodechlorinated to nitrobenzene (NB) which is then reduced to AN. Using the polymer-anchored bimetallic palladium-ruthenium catalyst, PVP-PdCl2-RuCl3, and in the presence of 1.0 mol% of sodium acetate, a strong synergic effect gives rise to a remarkable increase of the selectivity for p-chloroaniline (CAN) and the maximum selectivity of CAN is up to 94%. For the hydrogenation of the non-halo-substituted nitroaromatics to the corresponding aromatic amines, the monometallic PVP-PdCl2 catalyst only shows mild or poor activity, but the colloidal polymer-anchored bimetallic palladium-platinum catalyst, PVP-Pd-1/4Pt, exhibits very high activity and selectivity.

引用

页码：247 / 255

页数：9

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