Academic Journal
Titanium-based phenoxy-imine catalyst for selective ethylene trimerization: effect of temperature on the activity, selectivity and properties of polymeric side products
| العنوان: | Titanium-based phenoxy-imine catalyst for selective ethylene trimerization: effect of temperature on the activity, selectivity and properties of polymeric side products |
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| المؤلفون: | Cordier, Astrid, Breuil, Pierre-Alain, Michel, Typhène, Magna, Lionel, Olivier-Bourbigou, Hélène, Raynaud, Jean, Boisson, Christophe, Monteil, Vincent |
| المساهمون: | Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, IFP Energies nouvelles (IFPEN) |
| المصدر: | ISSN: 2044-4753 ; Catalysis Science & Technology ; https://hal.science/hal-03017341 ; Catalysis Science & Technology, 2020, 10 (6), pp.1602-1608. ⟨10.1039/C9CY02056J⟩. |
| بيانات النشر: | HAL CCSD Royal Society of Chemistry |
| سنة النشر: | 2020 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | [CHIM]Chemical Sciences |
| الوصف: | International audience ; The reactivity of a phenoxy-imine-ether system (FI)TiCl3/MAO was studied toward selective ethylene trimerization. This system was shown to either trimerize or polymerize ethylene depending on the reaction temperature. Its selectivity switches from a significant production of the trimerization product, 1-hexene (85 wt %, 520-450 kg1-hexene gTi-1 h-1) between 30 and 40 °C, to a moderate polyethylene formation (70-80 wt %, 60-70 kgpolyethylene gTi-1 h-1) at higher reaction temperature (T > 60 °C). Polymerization was investigated based on an original "polymer-to-catalyst" strategy aiming at identifying the active species responsible for this side reaction. Using DSC, SEC and high temperature 13 C NMR analyses, polyethylenes were found to exhibit high molar masses (> 10 5 g mol-1) and a low 1-hexene content (< 1 mol %) at any temperature. Kinetic studies support that trimerization and polymerization species are generated from the catalyst precursor at 40 °C but a parallel process may occur at higher temperature. The increase dispersity to 4.6 at 80 °C suggests a change from single to multisite catalysis. The poor comonomer incorporation ability of the active species is reminiscent of a molecular Ziegler Natta or a bulky postmetallocene catalyst. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-03017341; https://hal.science/hal-03017341; https://hal.science/hal-03017341/document; https://hal.science/hal-03017341/file/CY-ART-10-2019-002056_%20V2%28without%20apparent%20corrections%29_Titanium-based%20phenoxy-imine%20catalyst%20for%20selective%20ethylene%20trimerizationl.pdf |
| DOI: | 10.1039/C9CY02056J |
| الاتاحة: | https://hal.science/hal-03017341 https://hal.science/hal-03017341/document https://hal.science/hal-03017341/file/CY-ART-10-2019-002056_%20V2%28without%20apparent%20corrections%29_Titanium-based%20phenoxy-imine%20catalyst%20for%20selective%20ethylene%20trimerizationl.pdf https://doi.org/10.1039/C9CY02056J |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.383518E6 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1039/C9CY02056J |
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