Citation: Xiao Wei YAN, Jing Dai WANG, Yi Bing SHAN, Yong Rong YANG. Characteristics of Titanocene Catalyst Supported on Palygorskite for Ethylene Polymerization[J]. Chinese Chemical Letters, ;2006, 17(5): 653-656. shu

Characteristics of Titanocene Catalyst Supported on Palygorskite for Ethylene Polymerization

Department of Chemical Engineering, Zhejiang University, Hangzhou 310027

Received Date: 19 September 2005

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 20376069).

A series of heterogeneous catalysts with Cp₂TiCl₂ supported on palygorskite were prepared and evaluated by ethylene slurry polymerizations. The so-called direct supported catalyst, for which the pretreatment of palygorskite with MAO or Al(i-Bu)₃ was not necessary, gave the highest activity among these supported catalysts and could be more robust than homogeneous Cp₂TiCl₂. With the direct supported catalyst, no significant activity loss was observed under low Al/Ti molar ratios (Al/Ti=300) and the decay of polymerization rate was slower when compared to the other supported catalysts. It was found that the surface Lewis acidity of palygorskite after thermal treatment played an important role in activation of metallocene compound and resulted in high catalyst activity.
- Playgorskite,
- supported catalyst,
- ethylene polymerization,
- Lewis acidity
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