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Chemical Research in Chinese Universities

, Volume 34, Issue 6, pp 945–951 | Cite as

Nickel Complexes Based on Salicylaldehyde-imine Ligands: Synthesis, Characterization and Catalytic Oligomerization of Ethylene

  • Liduo Chen
  • Hongliang Huo
  • Libo Wang
  • Lili Ma
  • Yan Jiang
  • Junyi Xie
  • Jun WangEmail author
Article
  • 13 Downloads

Abstract

A series of nickel complexes {NOONR}Ni(A: R=Me; B: R=t-Bu; C: R=OMe) based on salicylalde-hyde-imine ligands was synthesized through Schiff base condensation and metal complexation reaction. Upon activa-tion with methylaluminoxane(MAO), nickel complexes AC all exhibited good catalytic activity([turnover fre-quency=5.2×105―16.3×105 g/(mol Ni h)] and oligomer selectivity(above 85%, mass fraction) in ethylene oligomerization. In addition, C8―C12 olefins occupied an important proportion in the products of oligomers. Under the conditions of 4.0 MPa, 25 °C and Al/Ni molar ratio of 275, the catalytic selectivity of A/MAO system toward C8―C12 was about 30.1%(mass fraction), and the content of C8―C12 α-olefins was consistently above 70%. Furthermore, besides the ligand environment, the catalytic properties of AC were substantially affected by experimental parameters, such as the reaction pressure, reaction temperature and Al/Ni ratio.

Keywords

Salicylaldehyde-imine ligand Nickel complex Ethylene oligomerization C8―C12 Olefin 

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Copyright information

© Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Liduo Chen
    • 1
  • Hongliang Huo
    • 2
  • Libo Wang
    • 2
  • Lili Ma
    • 2
  • Yan Jiang
    • 2
  • Junyi Xie
    • 1
  • Jun Wang
    • 1
    Email author
  1. 1.Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqingP. R. China
  2. 2.Daqing Chemical Research Center of Petrochina Petrochemical Research InstituteDaqingP. R. China

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