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Hydrogenation of Aromatic Nitrogroups with Precious Metal Powder Catalysts: Influence of Modifier on Selectivity and Activity

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Abstract

The development of new improved catalysts for the selective hydrogenation of aromatic nitrogroups is still a field of high interest for the chemical industry. Hydrogenation of aromatic nitrogroups to the corresponding aromatic amines is one of the most important applications for precious metal powder catalysts (PMPC). In this paper various commercial PMPC technologies such as palladium, platinum, platinum modified with copper and platinum modified with vanadium on activated carbon powder supports were compared to each other in regard to activity and selectivity for hydrogenation of 1-chloro-2-nitrobenzene. In this reaction, catalysts comprised of vanadium modified platinum on activated carbon showed excellent activities and selectivities towards 2-chloroaniline. Catalyst performance was affected by the ratio of platinum to vanadium and the properties of the carbon. The role of vanadium as an effective modifier to avoid accumulation of hazardous aromatic hydroxylamines was explained.

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Acknowledgment

The authors thank Evonik Degussa GmbH for supporting this work and Jaime Blanton for proofreading.

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Authors and Affiliations

  1. Evonik Degussa GmbH, Business Line Catalysts, Rodenbacher Chaussee 4, 63457, Hanau, Germany

    Konrad Möbus, Dorit Wolf, Holger Benischke, Ulrike Dittmeier, Klaus Simon, Uwe Packruhn, Ralf Jantke, Stefan Weidlich, Christoph Weber & Baoshu Chen

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  1. Konrad Möbus
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  2. Dorit Wolf
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  3. Holger Benischke
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  8. Stefan Weidlich
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  10. Baoshu Chen
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Correspondence to Konrad Möbus.

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Möbus, K., Wolf, D., Benischke, H. et al. Hydrogenation of Aromatic Nitrogroups with Precious Metal Powder Catalysts: Influence of Modifier on Selectivity and Activity. Top Catal 53, 1126–1131 (2010). https://doi.org/10.1007/s11244-010-9545-1

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