Abstract
The hydrogenation of m-dinitrobenzene to m-phenylenediamine in liquid phase was studied with the platinum catalysts supported on TiO2, Al2O3 and TiO2-Al2O3 carriers. These materials were successfully activated either by simple in situ reduction technique that makes use of the same reaction conditions or conventional reduction with H2 flowing at 723K. Among the catalysts tested, the Pt/TiO2-Al2O3 catalyst showed the highest activity and selectivity towards m-phenylenediamine, over which 99% m-dinitrobenzene conversion and 97% m-phenylenediamine selectivity were obtained at 363K under hydrogen pressure of 8,1 MPa after reaction for 22 h when using ethanol as solvent and the catalyst was previously activated by the in situ activation method.
Keywords: m-dinitrobenzene, m-phenylenediamine, Catalytic hydrogenation, Supported Pt, Activation method.
Current Organic Chemistry
Title:Effect of the Activation Method on Activity of Supported Platinum Catalysts for Hydrogenation of m-Dinitrobenzene to m-Phenylenediamine
Volume: 16 Issue: 23
Author(s): Hugo A. Rojas, Jairo A. Cubillos, Jose J. Martinez, Diana C. Guerrero and Patricio Reyes
Affiliation:
Keywords: m-dinitrobenzene, m-phenylenediamine, Catalytic hydrogenation, Supported Pt, Activation method.
Abstract: The hydrogenation of m-dinitrobenzene to m-phenylenediamine in liquid phase was studied with the platinum catalysts supported on TiO2, Al2O3 and TiO2-Al2O3 carriers. These materials were successfully activated either by simple in situ reduction technique that makes use of the same reaction conditions or conventional reduction with H2 flowing at 723K. Among the catalysts tested, the Pt/TiO2-Al2O3 catalyst showed the highest activity and selectivity towards m-phenylenediamine, over which 99% m-dinitrobenzene conversion and 97% m-phenylenediamine selectivity were obtained at 363K under hydrogen pressure of 8,1 MPa after reaction for 22 h when using ethanol as solvent and the catalyst was previously activated by the in situ activation method.
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Cite this article as:
Rojas A. Hugo, Cubillos A. Jairo, Martinez J. Jose, Guerrero C. Diana and Reyes Patricio, Effect of the Activation Method on Activity of Supported Platinum Catalysts for Hydrogenation of m-Dinitrobenzene to m-Phenylenediamine, Current Organic Chemistry 2012; 16 (23) . https://dx.doi.org/10.2174/138527212804546868
DOI https://dx.doi.org/10.2174/138527212804546868 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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