Controllable synthesis of bis[3-(dimethylamino)propyl]amine over Cr and Co double-doped Cu/γ-Al2O3

Chenhui Lin, Jiayi Li, Haotian Guo, Xingchun Wu, Bowei Wang, Xilong Yan

Index: 10.1016/j.catcom.2018.03.031

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Abstract

The continuous synthesis of bis[3-(dimethylamino)propyl]amine (BPA) by hydrogenation of 3-(dimethylamino)-propionitrile (PN) in the presence of 3-(N,N-dimethylamino)propylamine (PA) over copper-based catalysts was investigated. It was found that Cu-Cr2O3-CoO/γ-Al2O3 yielded satisfactory results with almost 100% PN conversion and 88.5% BPA selectivity (H2 pressure: 1 Mpa, temperature: 100 °C, PN/PA ratio: 2:1). All catalysts were characterized by XRD, XPS, H2-TPR, and TEM, the obtained results indicated that Cr could improve the catalytic activity. Moreover, Co dispersed around Cu particles promoted the catalytic nature, which could further enhance the activity and stability of the catalyst.