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Study on Copper-based Catalysts for Synthesis of N,N′-bis(1,4-dimethylpentyl)-p-phenylenediamine from Reductive Alkylation of p-Nitroaniline with 5-Methyl-2-hexanone

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Abstract

The reductive alkylation of p-nitroaniline with 5-methyl-2-hexanone over copper-based catalysts was investigated. Furthermore, the catalysts were characterized using the techniques of XRD, H2–N2O titration, H2-TPR, NH3-TPD and pyridine-FTIR. The results showed that the addition of Mn, Ba and La into Cu–SiO2 catalyst played an important role in the improvement of the selectivity towards N,N′-bis(1,4-dimethylpentyl)-p-phenylenediamine (BMPPD). The highest selectivity towards BMPPD over 58CuO–9MnO2–BaO–1La2O3–30SiO2 (wt.%) catalyst could be ascribed to the best dispersion of copper (i.e., the highest hydrogenation ability) and the most amounts of the surface Lewis acidic sites.

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Authors and Affiliations

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China

    Zhen Dong Pan, Yun Jie Ding, Li Yan, Xian Ming Li, Gui Ping Jiao & Hong Yuan Luo

  2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, P.R. China

    Zhen Dong Pan, Xian Ming Li & Gui Ping Jiao

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  1. Zhen Dong Pan
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  2. Yun Jie Ding
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  3. Li Yan
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  4. Xian Ming Li
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  5. Gui Ping Jiao
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  6. Hong Yuan Luo
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Correspondence to Yun Jie Ding.

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Pan, Z.D., Ding, Y.J., Yan, L. et al. Study on Copper-based Catalysts for Synthesis of N,N′-bis(1,4-dimethylpentyl)-p-phenylenediamine from Reductive Alkylation of p-Nitroaniline with 5-Methyl-2-hexanone. Catal Lett 122, 115–120 (2008). https://doi.org/10.1007/s10562-007-9355-7

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  • DOI: https://doi.org/10.1007/s10562-007-9355-7

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