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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Authors: | Zhen Dong Pan Yun Jie Ding Li Yan Xian Ming Li Gui Ping Jiao Hong Yuan Luo |
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Affiliation: | (1) Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China;(2) Graduate School of Chinese Academy of Sciences, Beijing, 100039, P.R. China |
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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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Keywords: | Copper-based catalysts N N′ -bis(1 4-dimethylpentyl)-p-phenylenediamine p-Nitroaniline 5-Methyl-2-hexanone Dispersion Lewis acidic sites |
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