Citation: Wang Jun, Li Huanyu, Liu Xianhong, Li Cuiqin, Zhang Na. Synthesis of Novel Dendrimer-Based Cobalt Catalyst for Ethylene Oligomerization[J]. Chemistry, ;2017, 80(2): 196-201. shu

Synthesis of Novel Dendrimer-Based Cobalt Catalyst for Ethylene Oligomerization

Wang Jun ^1, ,
Li Huanyu ¹ ,
Liu Xianhong ² ,
Li Cuiqin ¹ ,
Zhang Na ¹

1.
Key Laboratory of Oil Gas & Chemical Technology, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318
2.
Daqing Institute of Biological & Life Science, Northeast Forestry University, Daqing 163316

Received Date: 7 July 2016
Accepted Date: 19 August 2016

Figures(5)

The novel dendritic salicylaldimine ligand was synthesized by Schiff's base reaction using 1.0 generation dendrimer as bridged group, and the cobalt catalyst with 1, 8-octanediamine as core based on dendritic salicylaldimine ligand was prepared by cobalt metallic coordination reaction. The structures of the dendritic ligand and the cobalt catalyst were characterized by FT-IR, UV, ¹H NMR and MS, and proved to be consistent with the theoretical structures. The catalyst was evaluated as precursor for ethylene oligomerization with various co-catalysts, solvents, reaction conditions and metallic active centers. The results showed that the catalyst exhibit better catalytic performance after activation with Et₂AlCl in toluene. Under the conditions of 25℃, Al/Co molar ratio 1500, 1.0 MPa and 0.5 h employed for the cobalt catalyst, the catalytic activity showed a maximum value of 6.84×10⁵ g/(mol Co·h), and the selectivity for ≥C₈ olefins was 52.77%.
- Dendrimer,
- Salicylaldimine ligand,
- Catalyst,
- Ethylene oligomerization,
- Catalytic activity
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