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Catalyst Deactivation Processes during 1-Hexene Polymerization
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-06-03 , DOI: 10.1021/acscatal.0c01607
Anuj Joshi 1 , Harmen S. Zijlstra 1 , Scott Collins 1 , J. Scott McIndoe 1
Affiliation  

The catalyst [Cp2Zr(μ-Me)2AlMe2]+[B(C6F5)4] (1) has been studied by electrospray ionization mass spectrometry in order to better understand the complexities of catalyst deactivation in the polymerization of 1-hexene. Using off-line, online, and flow-based methods, we observe that zirconium π-allyl species are unstable in solution and previously unobserved dimethylalane complexes are more stable. The dimethylalane complexes are resistant to further 1-hexene additions, and their formation represents a previously unrecognized pathway for catalyst deactivation.

中文翻译:

1-己烯聚合过程中的催化剂失活过程

为了更好地了解催化剂失活的复杂性,采用电喷雾电离质谱法研究了催化剂[Cp 2 Zr(μ-Me)2 AlMe 2 ] + [B(C 6 F 54 ] -1)。 1-己烯的聚合。使用离线,在线和基于流的方法,我们观察到π-烯丙基锆在溶液中不稳定,以前未观察到的二甲基铝烷配合物更稳定。二甲基铝烷络合物对进一步的1-己烯加成具有抗性,并且它们的形成代表了催化剂失活的先前未被认识的途径。
更新日期:2020-07-02
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