Vapour-phase Beckmann rearrangement of cyclohexanone-oxime over Al-MCM-41 type mesostructured catalysts
| Autor: | Angelo Vaccari, J. B. Nagy, Laura Forni, Ferruccio Trifiro, C. Tosi, Giuseppe Fornasari |
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| Přispěvatelé: | L. Forni, C. Tosi, G. Fornasari, F. Trifirò, A. Vaccari, J.B. Nagy |
| Rok vydání: | 2004 |
| Předmět: |
VAPOUR PHASE
Chemistry Process Chemistry and Technology SI/AL RATIO Caprolactam Cyclohexanone oxime POLAR DILUENTS Oxime Catalysis chemistry.chemical_compound AL-MCM-41 CAPROLACTAM MCM-41 Beckmann rearrangement Organic chemistry Atomic ratio Physical and Theoretical Chemistry Space velocity Nuclear chemistry |
| Zdroj: | Journal of Molecular Catalysis A: Chemical. 221:97-103 |
| ISSN: | 1381-1169 |
| DOI: | 10.1016/j.molcata.2004.06.016 |
| Popis: | Al-MCM-41 type catalysts with different Al content (Si/Al = 10, 20, 40 as atomic ratio) have been prepared using cetyltrimethylammonium chloride as the organic surfactant and characterised by XRD, NMR, TGA, N2 sorption, FT-IR, TPD and pyridine adsorption. Different diluents such as methanol, ethanol, isopropanol and water have been used in different compositions for cyclohexanone-oxime (CEOX) selective conversion to ɛ-caprolactam over these ordered mesostructures, revealing the positive effect of polar diluents and above all of ethanol on conversion and ɛ-caprolactam selectivity. The increase of the weight hourly space velocity (WHSV) decreases the catalyst lifetime, while a better catalytic activity is obtained for a lower Si/Al ratio. |
| Databáze: | OpenAIRE |
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