Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (02): 258-265.DOI: 10.19894/j.issn.1000-0518.210084

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Synthesis of UiO-66-NH2Grafted Pyridineimine Cobalt Catalyst and Its Catalytic Performance in Ethylene Oligomerization

Jing TANG, Na ZHANG(), Dong-Xu SHI, Fang-Hui ZHANG, Jian-Jie TANG   

  1. College of Chemistry& Chemical Engineering, Northeast Petroleum University, Daqing 163318, China
  • Received:2021-03-01 Accepted:2021-07-02 Published:2022-02-10 Online:2022-02-09
  • Contact: Na ZHANG
  • Supported by:
    Heilongjiang Province College Students Innovation and Entrepreneurship Training Program(202010220044)

Abstract:

UiO-66-NH2grafted pyridineimine ligand was prepared by post synthetic modification with metal organic frameworks (MOFs) UiO-66-NH2and 2-pyridinecarboxaldehyde as raw materials, and then a novel UiO-66-NH2grafted pyridineimine cobalt catalyst was synthesized by complexation reaction with UiO-66-NH2 grafted pyridineimine ligand and CoCl2·6H2O as raw materials. The structure of the products was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, inductively coupled plasma mass spectrometry and nitrogen adsorption-desorption, and the catalytic performance of the UiO-66-NH2grafted pyridineimine cobalt catalyst in ethylene oligomerization was investigated. The results show that the reaction temperature, Al/Co molar ratio and ethylene pressure have a significant effect on the catalytic activity and products selectivity. The catalytic activity of 1.23×105g/ (molCo·h) and 88.96% selectivity of butene are obtained under the condition of the reaction temperature 25℃, Al/Co molar ratio of 1000 and ethylene pressure of 1.0 MPa.

Key words: Metal organic frameworks, Ethylene oligomerization, Catalyst, Activity, Selectivity

CLC Number: