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Particle engineering of magnesium ethoxide-based Ziegler-Natta catalyst through post-modification of magnesium ethoxide
Applied Catalysis A: General ( IF 5.5 ) Pub Date : 2021-09-01 , DOI: 10.1016/j.apcata.2021.118337
Patchanee Chammingkwan 1 , Mingkwan Wannaborworn 1 , Le Thi Tuyet Mai 1 , Minoru Terano 1 , Toshiaki Taniike 1 , Phairat Phiriyawirut 2
Affiliation  

A synthetic scheme for particle engineering of magnesium ethoxide (Mg(OEt)2) as a solid precursor for olefin polymerization catalysts was presented based on the exploitation of various organic compounds as a modulator in a post-addition step. It was found that the introduction of a modulator after the particle formation helped to modulate the macroscopic features and the crystalline structure of Mg(OEt)2 to the great extent without destructing the macroparticle morphology. Different types of organic compounds were exploited and their influences on the Mg(OEt)2 structural features were investigated. It was found that organic compounds with higher polarity caused strong modulation of Mg(OEt)2, which allowed particle and pore engineering of the final catalyst, and in turn its performance in propylene polymerization.



中文翻译:

乙醇镁基Ziegler-Natta催化剂通过乙醇镁后改性的粒子工程

基于在后添加步骤中利用各种有机化合物作为调节剂,提出了乙醇镁 (Mg(OEt) 2 ) 作为烯烃聚合催化剂的固体前体的粒子工程合成方案。发现在颗粒形成后引入调节剂有助于在不破坏宏观颗粒形态的情况下在很大程度上调节Mg(OEt) 2的宏观特征和晶体结构。开发了不同类型的有机化合物,并研究了它们对 Mg(OEt) 2结构特征的影响。发现具有较高极性的有机化合物会引起 Mg(OEt) 2 的强烈调制,这允许最终催化剂的颗粒和孔工程,进而其在丙烯聚合中的性能。

更新日期:2021-09-15
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