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

作　　者：CHEN Liduo HUO Hongliang WANG Libo MA Lili JIANG Yan XIE Junyi WANG Jun 

机构地区：[1]Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China [2]Daqing Chemical Research Center of PetroChina Petrochemieal Research Institute, Daqing 163714, P. R. China

出　　处：《Chemical Research in Chinese Universities》2018年第6期945-951,共7页高等学校化学研究（英文版）

摘　　要：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 activation with methylalurninoxane（MAO）, nickel complexes A--C all exhibited good catalytic activity[turnover frequency=5.2×10^5-16.3×10^5 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℃ and A1/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 a-olefins was consistently above 70%. Furthermore, besides the ligand environment, the catalytic properties of A-C were substantially affected by experimental parameters, such as the reaction pressure, reaction temperature and A1/Ni ratio.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 activation with methylalurninoxane（MAO）, nickel complexes A--C all exhibited good catalytic activity[turnover frequency=5.2×10^5-16.3×10^5 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℃ and A1/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 a-olefins was consistently above 70%. Furthermore, besides the ligand environment, the catalytic properties of A-C were substantially affected by experimental parameters, such as the reaction pressure, reaction temperature and A1/Ni ratio.

关 键 词：Salicylaldehyde-imine ligand Nickel complex Ethylene oligomerization C8-C 12 olefin 

分 类 号：O614.813[理学—无机化学] TQ113.247[理学—化学]