LIQUID-PHASE HYDROGENATION OF m-DINITROBENZENE OVER PLATINUM CATALYSTS

被引：21

作者：

Rojas, Hugo ^{[1
]}

Borda, Gloria ^{[1
]}

Reyes, Patricio ^{[2
]}

Brijaldo, Maria ^{[1
,3
]}

Valencia, Jesus ^{[3
]}

机构：

[1] Univ Pedag & Tecnol Colombia, Grp Catalisis GC UPTC, Escuela Quim, Tunja, Colombia

[2] Univ Concepcion, Dept Quim Fis, Concepcion, Chile

[3] Univ Nacl Colombia, Dept Quim, Ctr Catalisis Heterogenea, Bogota, Colombia

来源：

JOURNAL OF THE CHILEAN CHEMICAL SOCIETY | 2011年 / 56卷 / 03期

关键词：

m-dinitrobenzene; m-phenylenediamine; hydrogenation; fine chemical; CITRAL HYDROGENATION; ALUMINA; SURFACE; REDUCTION; OXIDATION; BEHAVIOR; CO;

D O I：

10.4067/S0717-97072011000300016

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The m-dinitrobenzene hydrogenation to m-phenylenediamine in liquid phase was studied with platinum supported on SiO2, TiO2, Al2O, and Nb2O5, catalysts. Incipient impregnation method was used to prepare the catalysts with 1wt% of Pt. The effect of the support and the reduction temperature (473 K or 773 K) were analyzed. The materials were characterized by X-ray diffraction (XRD), nitrogen physisorption (77 K), hydrogen chemisorption (298 K), transmission electron microscopy (TEM), temperature programmed reduction (H-2-TPR) and temperature programmed desorption of ammonia (NH3,-TPD). The results showed that Pt/TiO2(HT) catalyst had a higher yield (60%) toward m- phenylenediamine and conversion level (98.2%) of m-dinitrobenzene. This behavior can be attributed to the reduction of PtO crystallites to metallic Pt, small particle size and the strong metal-support interaction due to the migration a-no, species on the Pt crystallites.

引用

页码：793 / 798

页数：6

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