Elongation and branching of α-olefins by ethylene employing an easily accessible Zr catalyst

IF 6.5 1区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Catalysis Pub Date : 2024-04-17 DOI:10.1016/j.jcat.2024.115503

Christian Heber, Thomas Dietel, Isabelle Haas, Winfried P. Kretschmer, Rhett Kempe

引用次数: 0

Abstract

Selective co-oligomerizations between α-olefins and ethylene are of high interest since they allow to extend the α-olefin scope employing inexpensive and abundantly available ethylene. Here we report on an easily accessible zirconium catalyst that permits the co-oligomerization of 1-hexene and ethylene with an activity of 2200 kg/mol h bar and a co-oligomer selectivity of 65 mol%. In more detail, we report synthesis and structure of six novel Zr precatalysts, their ethylene homo-oligomerization behavior and the co-oligomerization of the most promising of the six precatalysts. Criteria were activity and selectivity (α-value). Some of the Zr catalyst systems introduced here show an extremely high activity in ethylene homo-oligomerization up to 96,600 kg/mol h bar.

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乙烯利用易得的 Zr 催化剂对 α-烯烃进行伸长和分支处理

α-烯烃和乙烯之间的选择性共聚合反应具有很高的关注度，因为它们可以利用廉价且大量存在的乙烯扩大α-烯烃的应用范围。在此，我们报告了一种易于获得的锆催化剂，它允许 1-己烯和乙烯共聚，活性为 2200 kg/mol h bar，共聚物选择性为 65 mol%。我们更详细地报告了六种新型 Zr 前催化剂的合成和结构、它们的乙烯同质异构化行为以及六种前催化剂中最有前景的共异构化。标准是活性和选择性（α 值）。本文介绍的一些锆催化剂体系在乙烯均聚合反应中表现出极高的活性，最高可达 96,600 kg/mol h bar。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Catalysis 工程技术-工程：化工

CiteScore

12.30

自引率

5.50%

发文量

447

审稿时长

31 days

期刊介绍： The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes. The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods. The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.