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Studies on the polymerization of ethylene using a high-yield MgCl2-supported titanium catalyst, 3. Chemical composition of the standard system and its alterations

✍ Scribed by Hans Fuhrmann; Brigitte Strübing

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 646 KB
Volume: 195
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.1994.021950121

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✦ Synopsis

Abstract

Middle‐range n‐alkyl chlorides are the most suitable components among a variety of tested alkyl halides in the preparation process of the highly active Ti‐Mg catalyst MTK~ST~. A material balance of the initial components RCl, THF and CCl~4~ revealed the formation of oligomers, chloro‐containing telomers and poly‐THF apart from low‐molecular side products. The former are important modifiers of the suspension catalyst and exert a positive influence on catalyst activity and polymer properties, as was shown in the polymerization of ethylene. Schlenk equilibrium and extent of Wurtz type coupling in the Grignard synthesis step, which have been evaluated by titration of RMg bonds and Cl analysis of both the liquid and solid phase of the catalyst, predetermine the quality of the catalyst being formed.

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Studies on the polymerization of ethylen

Studies on the polymerization of ethylene using a high-yield MgCl2-supported titanium catalyst, 4. Structural investigation by X-ray diffraction and electron spin resonance measurements on the state of titanium ions in the standard system and its modifications

✍ Hans Fuhrmann; Werner Herrmann 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 702 KB

## Abstract The MgCl~2~‐supported titanium catalyst MTK~ST~ was characterized by X‐ray diffraction measurement and electron spin resonance (ESR) spectroscopy. To obtain a better understanding of the nature of active sites the process of catalyst formation was interrupted at several stages to obtain