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Isomerization of 5-Vinyl-2-norbornene Using Sodium-coated Catalysts
- Issue Date
- 20-11월-2008
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Double bond isomerization; 5-Ethylidene-2-norbornene; EPDM rubber; Solid base catalyst
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.29, no.11, pp.2202 - 2204
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 29
- Number
- 11
- Start Page
- 2202
- End Page
- 2204
- ISSN
- 0253-2964
- Abstract
- Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral gamma-Al2O3 (neutral alumina, N-Al2O3) basic gamma-Al2O3 (basic alumina, B-Al2O3), SiO2, MgO, and TiO2, and their catalytic activities were evaluated for the isomerization of 5-vinyl-2-norbornene (VNB) to 5-ethylidene-2-norbornene (ENB). Of various sodium-coated catalysts, Na/N-Al2O3 and Na/B-Al2O3 showed extremely high activities, resulting in quantitative conversion of VNB. Catalyst characterization and isomerization results clearly demonstrated that the presence of both strong basic sites (pK(BH) >= 27) and one-electron donor sites on the Na/Al2O3 is prerequisite for the isomerization of VNB to take place.
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