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| Oligomerization and Polymerization of Ethylene Initiated by a Novel Ni(Ⅱ)-Based Acetyliminopyridine Complexes as Single-Site Catalysts | |
| 作者姓名： | Baojun Zhang Yanji Wang Gang Wang Jun Cao Shukun Sun Lihua Xing Yongcheng Sun Yunguang Han Hebei University of Technology Tianjin China Research Institute of Daqing Petrochemical Company Daqing Heilongjiang China College of Chemical Science and Engineering China University of Petroleum Beijing China |
| 作者单位： | Baojun Zhang，Yanji Wang，Gang Wang，Jun Cao，Shukun Sun，Lihua Xing，Yongcheng Sun，Yunguang Han Hebei University of Technology，Tianjin 300130，China; Research Institute of Daqing Petrochemical Company，Daqing 163714，Heilongjiang，China; College of Chemical Science and Engineering，China University of Petroleum，Beijing 102249，China |
| 基金项目： | This work is supported by PetroChina Company Limited (No.030414-01) |
| 摘 要： | Novel Ni(Ⅱ)-based acetyliminopyridine complexes 1b, 2b, 3b (1-3b), which are synthesized from ligands 1a, 2a, 3a (1-3a) and NiCl2(DME)], are suitable precursors for the catalysts that are necessary for ethylene oligomerization and polymerization reactions, activated by methylaluminoxane (MAO). The MAO-treated 1-3b presents an active catalytic center, which may oligomerize and polymerize ethylene to produce linearα-olefins and polyethylene, respectively. The molecular weight distributions of oligomers that are obtained are in good agreement with the Schulz-Flory rules for oligomers>C4. The activity of 3b-MAO complex is 6.3×107 g/(molNi·h) at 50℃. The activities and molecular weight distributions of oligomers show significant reliance on the structures of catalyst precursors. |
| 关 键 词： | oligomerization polymerization ethylene Ni(Ⅱ)-based catalyst α-olefin |
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