Preparation of nanosized silicalite - 1 and its application in vapor - phase beckmann rearrangement of cyclohexanone oxime / Yi-Qiang Deng in Industrial & engineering chemistry research, Vol. 51 N° 28 (Juillet 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9492-9499 Titre : Preparation of nanosized silicalite - 1 and its application in vapor - phase beckmann rearrangement of cyclohexanone oxime Type de document : texte imprimé Auteurs : Yi-Qiang Deng, Auteur ; Shuang-Feng Yin, Auteur ; Chak-Tong Au, Auteur Année de publication : 2012 Article en page(s) : pp. 9492-9499 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Preparation Nanosized Résumé : Series of silicalite-1 catalysts with particle size varying from 50 to 450 nm were synthesized by hydrothermal method using tetrapropylammonium hydroxide as a template and L-lysine as an additive. The crystal size of silicalite-1 could be easily controlled by regulating the amount of L-lysine. The series of silicalite-1 and their NaOH-modified derivatives were examined as catalysts for vapor-phase Beckmann rearrangement of cyclohexanone oxime to caprolactam in the 330-390 °C range. It was found that the crystal size of silicalite-1 has an effect on catalytic activity, ε-caprolactam selectivity, and catalyst stability. With a decline in crystal size, there was improvement of catalytic activity and catalyst stability. It is deduced that silicalite-1, of a smaller crystal size, is less inclined to pore blocking by coke and hence has better resistance to deactivation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3001277 [article] Preparation of nanosized silicalite - 1 and its application in vapor - phase beckmann rearrangement of cyclohexanone oxime [texte imprimé] / Yi-Qiang Deng, Auteur ; Shuang-Feng Yin, Auteur ; Chak-Tong Au, Auteur . - 2012 . - pp. 9492-9499. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9492-9499 Mots-clés : Preparation Nanosized Résumé : Series of silicalite-1 catalysts with particle size varying from 50 to 450 nm were synthesized by hydrothermal method using tetrapropylammonium hydroxide as a template and L-lysine as an additive. The crystal size of silicalite-1 could be easily controlled by regulating the amount of L-lysine. The series of silicalite-1 and their NaOH-modified derivatives were examined as catalysts for vapor-phase Beckmann rearrangement of cyclohexanone oxime to caprolactam in the 330-390 °C range. It was found that the crystal size of silicalite-1 has an effect on catalytic activity, ε-caprolactam selectivity, and catalyst stability. With a decline in crystal size, there was improvement of catalytic activity and catalyst stability. It is deduced that silicalite-1, of a smaller crystal size, is less inclined to pore blocking by coke and hence has better resistance to deactivation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3001277

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