Preparation of Methylaluminoxane from CO 2 and Me 3 Al

In this contribution, we investigated the key factors for the successful preparation of methylaluminoxane (MAO) from CO 2 and Me 3 Al by analyzing the reaction intermediates and by‐products. The preparation of MAO, which possesses high cocatalytic ability, requires a precise amount of CO 2 feed. GC–...

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Bibliographic Details
Published inEuropean journal of inorganic chemistry Vol. 2019; no. 18; pp. 2392 - 2395
Main Authors Okajima, Yuuya, Nakayama, Yuushou, Shiono, Takeshi, Tanaka, Ryo
Format Journal Article
LanguageEnglish
Published 15.05.2019
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Summary:In this contribution, we investigated the key factors for the successful preparation of methylaluminoxane (MAO) from CO 2 and Me 3 Al by analyzing the reaction intermediates and by‐products. The preparation of MAO, which possesses high cocatalytic ability, requires a precise amount of CO 2 feed. GC–MS and NMR analysis of the product suggested that tert ‐butoxyaluminum species was a key intermediate, which guaranteed the involvement of CO 2 in the formation of MAO. The prepared MAO can be applied as a cocatalyst in propylene polymerization using zirconocene, titanocene, nickel, and iron catalysts; its performance as cocatalyst reached to almost the same level as that of the commercially available MAO. Considering that currently olefin monomers require thorough removal of CO 2 before polymerization, this method can open the way to omitting some purification processes in the polyolefin industry.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201900356