化工进展

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新型树枝状镍系催化剂的合成、表征及催化乙烯聚合的性能

施伟光1,杨光1,王斯晗2,李翠勤1,王俊1   

  1. 1东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江 大庆 163318;2中国石油大庆化工 研究中心,黑龙江 大庆 163318
  • 出版日期:2014-07-05 发布日期:2014-07-25

Synthesis and characterization of novel dendrimer-based nickel catalyst for ethylene polymerization

SHI Weiguang1,YANG Guang1,WANG Sihan2,LI Cuiqin1,WANG Jun1   

  1. 1Provincial Key Laboratory of Oil & Gas Chemical Technology,School of Chemistry & Chemical Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;2Daqing Petrochemical Research Center,CNPC,Daqing 163318,Heilongjiang,China
  • Online:2014-07-05 Published:2014-07-25

摘要: 合成了一种含有强供电子、较大空间位阻的新型树枝状水杨醛亚胺配体及其镍配合物,利用1H NMR、元素分析、FT-IR、UV进行了表征。以配合物为催化剂,甲基铝氧烷(MAO)为助催化剂对乙烯齐聚反应进行了研究,详细考察了聚合反应温度、Al/Ni摩尔比、反应压力及时间对催化剂活性及产物分布的影响。结果表明,齐聚产物为不同碳链的烯烃,在温度为25℃、Al/Ni=500、压力为0.5MPa、时间为0.5h的条件下,树枝状催化剂的活性最高,达到4.93?105g/(mol Ni?h),C10~C18的含量为54.17%。

关键词: 树枝状大分子, 水杨醛亚胺配体, 镍配合物, 乙烯齐聚

Abstract: A new tert-butyl-substituted dendrimer compound and its corresponding Ni(Ⅱ) complex were synthesized and characterized with 1H NMR,elemental analysis,FT-IR,UV. The nickel complex activated by methylaluminoxane (MAO) was tested in oligomerization of ethylene. The effects of Al/Ni molar ratio and polymerization temperature on catalyst activity and product distribution were also investigated. The products were olefines with different carbon chains,catalytic activity reached a maximum value 4.93×105g/(mol Ni?h) at reaction time of 30min,reaction pressure of 0.5MPa,reaction temperature of 25℃ and Al/Ni ratio 500 for the tert-butyl-substituted nickel complex,and C10—C18 were 54.17%.

Key words: dendrimer, salicylaldehyde-imine ligand, nickel complex, ethylene oligomerization