Modification of Si/Mg Composite Supported ZieglerNatta Ti-based Catalysts for Propylene Polymerization Using the Third Metal Elements

By : Wei Zhu, Zhou Tian, Pingkai Jiang, Boping Liu

Page No: 265-279

Abstract
In this study, several (SiO2 /MgO/ID/MClx/MgCl2 )·TiClx Ziegler-Natta Catalysts are synthesized by a co-impregnation method to study a third metal (Zr, V, Fe, Mn, W) effect on catalytic performance in propylene polymerization. When the metal doping content is 10 wt% (compare to magnesium elements), the activity of W doped catalyst shows 60.0% higher. While the activity of Zr, V, Fe and Mn doped catalyst both decreased. Correlations of the catalyst activities with the iron radius and the electronegativity of the third metal elements are discussed. In the same doping content condition, metals have similar radius with Mg2+ have higher activity (Fe, Mn and W> V and Zr). The mechanism of Mn and W effects are discussed. The activity of 5 wt% and 3 wt% Mn doped catalyst is higher compared with the catalyst without doping. It means that the doping content also have an influence on the catalyst performance.

Authors :
Wei Zhu : State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China
Zhou Tian : Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P.R.China
Pingkai Jiang : Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
Boping Liu : College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China
 

DOI: https://doi.org/10.32381/JPM.2018.35.03.2