Comparison of Support Effects on Phillips and Metallocene Catalysts
Both metallocene and Phillips chromium catalysts are used in the commercial manufacture of polyethylene. Unlike most other commercial metallocene systems, the Chevron Phillips Chemical (CPC) platform does not use methylaluminoxane or fluoroorganic boranes. Instead, the support itself serves to activ...
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MDPI AG
2021-07-01
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Online Access: | https://www.mdpi.com/2073-4344/11/7/842 |
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author | Qing Yang Max Paul McDaniel |
author_facet | Qing Yang Max Paul McDaniel |
author_sort | Qing Yang |
collection | DOAJ |
description | Both metallocene and Phillips chromium catalysts are used in the commercial manufacture of polyethylene. Unlike most other commercial metallocene systems, the Chevron Phillips Chemical (CPC) platform does not use methylaluminoxane or fluoroorganic boranes. Instead, the support itself serves to activate (ionize) the metallocenes, which then polymerize ethylene at high activity. Most of these solid acid supports can also be used to anchor Cr to make a Phillips catalyst. This provides an interesting opportunity to compare the polymerization responses by these two disparate systems, Phillips Cr and CPC metallocene, when supported on the same solid acid carriers. In this study, both chromium oxide and several metallocenes were deposited onto a variety of solid oxides, under a variety of conditions, and the resulting support effects were observed and compared. Although using seemingly different chemistries, the two catalyst systems exhibited a surprising number of similarities, which can be attributed to the acidity and porosity of these diverse supports. |
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institution | Directory Open Access Journal |
issn | 2073-4344 |
language | English |
last_indexed | 2024-03-10T09:42:42Z |
publishDate | 2021-07-01 |
publisher | MDPI AG |
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series | Catalysts |
spelling | doaj.art-033371df4a444c47a58fc3c87c3b37052023-11-22T03:27:22ZengMDPI AGCatalysts2073-43442021-07-0111784210.3390/catal11070842Comparison of Support Effects on Phillips and Metallocene CatalystsQing Yang0Max Paul McDaniel1Chevron Phillips Chemical Co., Bartlesville, OK 74006, USAChevron Phillips Chemical Co., Bartlesville, OK 74006, USABoth metallocene and Phillips chromium catalysts are used in the commercial manufacture of polyethylene. Unlike most other commercial metallocene systems, the Chevron Phillips Chemical (CPC) platform does not use methylaluminoxane or fluoroorganic boranes. Instead, the support itself serves to activate (ionize) the metallocenes, which then polymerize ethylene at high activity. Most of these solid acid supports can also be used to anchor Cr to make a Phillips catalyst. This provides an interesting opportunity to compare the polymerization responses by these two disparate systems, Phillips Cr and CPC metallocene, when supported on the same solid acid carriers. In this study, both chromium oxide and several metallocenes were deposited onto a variety of solid oxides, under a variety of conditions, and the resulting support effects were observed and compared. Although using seemingly different chemistries, the two catalyst systems exhibited a surprising number of similarities, which can be attributed to the acidity and porosity of these diverse supports.https://www.mdpi.com/2073-4344/11/7/842ethylene polymerizationPhillips catalystCr/silicasolid acidmetallocene activationlong-chain branching |
spellingShingle | Qing Yang Max Paul McDaniel Comparison of Support Effects on Phillips and Metallocene Catalysts Catalysts ethylene polymerization Phillips catalyst Cr/silica solid acid metallocene activation long-chain branching |
title | Comparison of Support Effects on Phillips and Metallocene Catalysts |
title_full | Comparison of Support Effects on Phillips and Metallocene Catalysts |
title_fullStr | Comparison of Support Effects on Phillips and Metallocene Catalysts |
title_full_unstemmed | Comparison of Support Effects on Phillips and Metallocene Catalysts |
title_short | Comparison of Support Effects on Phillips and Metallocene Catalysts |
title_sort | comparison of support effects on phillips and metallocene catalysts |
topic | ethylene polymerization Phillips catalyst Cr/silica solid acid metallocene activation long-chain branching |
url | https://www.mdpi.com/2073-4344/11/7/842 |
work_keys_str_mv | AT qingyang comparisonofsupporteffectsonphillipsandmetallocenecatalysts AT maxpaulmcdaniel comparisonofsupporteffectsonphillipsandmetallocenecatalysts |