高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (7): 1536.doi: 10.7503/cjcu20131299

• 物理化学 • 上一篇    下一篇

超支化分子桥联水杨醛亚胺镍配合物的合成及对乙烯齐聚反应的催化性能

王俊, 杨光, 李翠勤(), 施伟光   

  1. 东北石油大学石油与天然气化工省重点实验室, 大庆 163318
  • 收稿日期:2014-01-02 出版日期:2014-07-10 发布日期:2014-04-29
  • 作者简介:联系人简介: 李翠勤, 女, 博士, 副教授, 主要从事树枝状催化剂及树枝状抗氧剂设计合成研究. E-mail: licuiqin78@163.com

Synthesis and Ethylene Oligomerization Catalytic Activities of Hyperhranched Salicylaldehyde-imine Nickel Complex

WANG Jun, YANG Guang, LI Cuiqin*(), SHI Weiguang   

  1. Provincial Key Laboratory of Oil & Gas Chemical Technology, Northeast Petroleum University, Daqing 163318, China
  • Received:2014-01-02 Online:2014-07-10 Published:2014-04-29
  • Contact: LI Cuiqin E-mail:licuiqin78@163.com

摘要:

合成了一种具有超支化结构的新型水杨醛亚胺配体及其Ni(Ⅱ)配合物, 利用元素分析、 电喷雾电离质谱(ESI-MS)、 傅里叶变换红外光谱(FTIR)、 紫外-可见光谱(UV-Vis)、 氢核磁共振谱(1H NMR)和碳核磁共振谱(13C NMR)对其结构进行了表征. 以甲基铝氧烷(MAO)为助催化剂, 考察了超支化水杨醛亚胺镍配合物对乙烯齐聚反应的催化活性及聚合条件(Al/Ni摩尔比、 聚合温度)对催化剂活性及聚合产物分布的影响. 结果表明, 在反应温度为25 ℃、 Al/Ni摩尔比为500时, 该催化剂的活性最高达到5.59×105 g/(mol Ni·h), 得到的聚合产物为全馏分烯烃, 其中高碳烯烃C10~C18的含量最高达91%.

关键词: 超支化分子, 水杨醛亚胺配体, 镍配合物, 乙烯齐聚, 高碳烯烃

Abstract:

A novel hyperbranched salicylaldehyde-imine nickel complex was prepared and characterized via elemental analysis, electrospray ionization-mass spectrometry(ESI-MS), Fourier transform infrared spectrometry(FTIR), UV-Vis spectrometry(UV-Vis), 1H nuclear magnetic resonance(1H NMR) and 13C nuclear magnetic resonance(13C NMR) spectrometry. This hyperbranched complex was evaluated as catalyst precursor in the oligomerization of ethylene, using methylaluminoxane(MAO) as an activator. The effects of the Al/Ni molar ratio and polymerization temperature on the catalyst activity and product distribution were investigated. The results show that the catalyst possesses a middle catalytic activity of 5.59×105 g/(mol Ni·h) with a selectivity for higher olefins(C10—C18) of 91%.

Key words: Hyperbranched molecule, Salicylaldehyde-imine ligand, Nickel complex, Ethylene oligomerization, Higher olefin(Ed.: S, Z, M)

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