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橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT

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图 6 负载型催化剂循环利用性能
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Study on the performance of Schiff base imine covalently grafted on
silica supported nickel catalyzed ethylene oligomerization

Han Yunguang, Gao Yuxin, Ma Hongyu, Xin Hong, Huang Fuling, Li Wenpeng, Wang Yali

(Daqing Chemical Research Center, PetroChina CO. LTD., Daqing 163714, Heilongjiang, China)
Abstract: Covalently supported catalysts have potential applications in the field of ethylene
oligomerization due to their good thermal stability, recyclability and long-term catalytic activity. In this paper,
a class of supported transition metal catalysts was prepared by covalently grafting Schiff base imine-nickel
organic complexes onto silica, and their catalytic performance for ethylene oligomerization was investigated.
When the Al/Ni ratio is 700, the main catalyst dosage is 5 μmol, the reaction temperature is 35 ℃ , the reaction
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pressure is 0.5 MPa, and the reaction time is 30 min, the catalytic activity can reach 2.98×10 g·(mol Ni·h) .
The selectivity of C6 olefin is 92.27%, and the catalyst has good stability and recyclability.
Key words: Schiff base imine; ethylene oligomerization; supported catalyst; covalent grafting
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