Citation: Wei Zhang, Bin-Bo Jiang, Jian Ye, Zu-Wei Liao, Zheng-Liang Huang, Jing-Dai Wang, Yong-Rong Yang. Preparation of Aryloxy-aluminoxanes and Their Use as Activators in the Bis(imino)pyridyl Iron-catalyzed Oligomerization of Ethylene[J]. Chinese Journal of Polymer Science, ;2018, 36(11): 1207-1216. doi: 10.1007/s10118-018-2146-3 shu

Preparation of Aryloxy-aluminoxanes and Their Use as Activators in the Bis(imino)pyridyl Iron-catalyzed Oligomerization of Ethylene

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding author: Jian Ye, polyejian@zju.edu.cn
Received Date: 20 March 2018
Revised Date: 11 April 2018
Accepted Date: 22 April 2018
Available Online: 25 May 2018

In this study, a series of aryloxy-aluminoxanes originated directly from the hydrolysis of reaction products of AlMe₃ and phenols were synthesized, which could serve as effective polymer-retarding activators for the iron-catalyzed ethylene oligomerization. The molar ratios of [PhOH]/[AlMe₃] and [H₂O]/[Al] during the preparation were explored and their impacts on the oligomerization activity and product distribution were discussed. To obtain the effective activators with good polymer-retarding effect and relatively high activity, the optimized conditions were proposed to be [PhOH]/[AlMe₃] = 0.5 and [H₂O]/[Al] = 0.7. Various aluminoxanes with different [―OH] sources confirmed the importance of using phenols in preparing the effective polymer-retarding activators. By utilizing these aryloxy-aluminoxanes, the mass fraction of polymers in the total products could be reduced to lower than 1.0 wt%, which is much lower than that of the MAO-activated systems (> 30 wt%). This is a potential benefit for the industrial application of the iron-catalyzed oligomerization process.
- Ethylene oligomerization,
- Bis(imino)pyridyl iron catalysts,
- Aryloxy-aluminoxanes,
- Phenols,
- Trimethylaluminum hydrolysis
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沈阳化工大学材料科学与工程学院沈阳 110142