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Polymerization on CO-Reduced Phillips Catalyst initiates through the C-H bond Activation of Ethylene on Cr-O Sites.
- Source :
-
Catalysis Letters . May2014, Vol. 144 Issue 5, p805-808. 4p. 1 Diagram, 1 Graph. - Publication Year :
- 2014
-
Abstract
- Investigation of the polymerization of ethylene on CO-reduced Phillips catalyst (1 wt% chromium) by infrared spectroscopy reveals the presence of new OH bands. In particular, an OH-band appears at 3,605 cm, consistent with the interaction of the SiOH group with an adjacent Lewis acidic chromium center, Si-(μ-OH)-Cr. Polymerization with d-ethylene leads to the formation of the isotopically shifted band at 2,580 cm, consistent with heterolytic C-H activation of ethylene over a Cr-O bond to generate the first Cr-C bond in ethylene polymerization with Phillips catalyst, as recently observed on well-defined Cr(III) silicates. Graphical Abstract: [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1011372X
- Volume :
- 144
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Catalysis Letters
- Publication Type :
- Academic Journal
- Accession number :
- 95616392
- Full Text :
- https://doi.org/10.1007/s10562-014-1238-0