Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (4): 20240003.doi: 10.7503/cjcu20240003

• Physical Chemistry • Previous Articles     Next Articles

Highly Selective Hydrogenation of Adiponitrile to Hexamethyleneimine Catalyzed by Carbon Nitrogen Composited Nickel Catalysts

ZHANG Chenyang, JIA Chenxu, HUANG Jun()   

  1. College of Chemical Engineering,State Key Laboratory of Materials?oriented Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
  • Received:2024-01-02 Online:2024-04-10 Published:2024-03-01
  • Contact: HUANG Jun E-mail:junhuang@njtech.edu.cn

Abstract:

Hexamethyleneimine(HMI) is a crucial intermediate in the production of pharmaceuticals and agrochemicals, including penicillin, herbicides, and fungicides. In this study, supported Ni-based catalysts were prepared using solvent-assisted mechanochemical ball milling and pyrolysis, and the catalytic performance for the hydrogenation of 1,6-adiponitrile(ADN) to HMI was evaluate. The results demonstrated that the supported Ni-based catalyst Ni/IM-C(R) exhibited high activity for the hydrogenation of ADN to HMI in 98% yield. The catalyst Ni/IM-C(R) was prepared by co-ball milling nickel acetate, 2-methylimidazole and activated carbon, followed by calcination in N2 and then reduced by H2. The surface structures and the chemical properties of the Ni/IM-C(R) catalyst were characterized via various techniques, including X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscope, and N2 adsorption-desorption measurements. The characterization results indicated that nitrogen-doped carbon improved the dispersion of Ni nanoparticles in the Ni/IM-C(R) catalyst. The catalyst Ni/IM-C(R) displayed small Ni nanoparticles with high surface, which directed the high activity for the hydrogenation of ADN to HMI. Without additives, the Ni/IM-C(R) catalyzed hydrogenation of ADN exhibited excellent activity and high selectivity towards HMI. The Ni/IM-C(R) catalyst is stable and recyclable for several times without deactivation. The Ni/IM-C(R) catalyst is simple to be prepared and the Ni/IM-C(R) catalyzed hydrogenation of ADN is promising for industrial applications.

Key words: Hexamethyleneimine, Adiponitrile, Nickel catalyst, Selective hydrogenation

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