Effects of various poisoning compounds on the activity and stereospecificity of heterogeneous Ziegler–Natta catalyst
A TiCl4/ethylbenzoate/MgCl2 Ziegler–Natta catalyst was pretreated with chemically different poisoning compounds to investigate their effects on the catalyst activity and stereospecificity for propylene polymerization. The poisoning power on the activity was in the order of methanol > acetone >...
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| Médium: | Článek |
| Jazyk: | English |
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Taylor & Francis Group
2008-01-01
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| Edice: | Science and Technology of Advanced Materials |
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| On-line přístup: | http://www.iop.org/EJ/abstract/1468-6996/9/2/024402 |
| Shrnutí: | A TiCl4/ethylbenzoate/MgCl2 Ziegler–Natta catalyst was pretreated with chemically different poisoning compounds to investigate their effects on the catalyst activity and stereospecificity for propylene polymerization. The poisoning power on the activity was in the order of methanol > acetone > ethyl acetate. A kinetic analysis using the stopped-flow method revealed that addition of the poisoning materials decreased the activity through the reduction of the number of active sites, whereas the catalyst isospecificity was hardly affected by these materials. |
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| ISSN: | 1468-6996 1878-5514 |