| Titre : | Preparation of nanosized silicalite - 1 and its application in vapor - phase beckmann rearrangement of cyclohexanone oxime (2012) |
| Auteurs : | Yi-Qiang Deng, Auteur ; Shuang-Feng Yin, Auteur ; Chak-Tong Au, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 28, Juillet 2012) |
| Article en page(s) : | pp. 9492-9499 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | 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 |
