The synthesis of silicalite-2 (MEL structure) is reported in order to understand the effect, on chemico-physical properties, of some parameter modifications during the synthesis, such as silica source. MEL type zeolites with intergrowth with MFI-type structure were prepared and the percentage of the two phases has been changed. The effect of synthesis parameters on crystals shape and size was investigated. Silicalite-2 catalysts were tested in the vapour phase Beckmann rearrangement of cyclohexanone oxime. In some cases interesting results leading to long catalyst lifetime (over 80 hours) and interesting caprolactam selectivity (>90%) are obtained.
L. Forni, G. Fornasari, M. Guerrini, F. Trifirò, A. Macario, A. Katovic, et al. (2005). High-silica MEL structures: synthesis parameters modification and catalytic results on Beckmann rearrangement reaction [10.1016/S0167-2991(05)80539-7].
High-silica MEL structures: synthesis parameters modification and catalytic results on Beckmann rearrangement reaction
FORNI, LAURA;FORNASARI, GIUSEPPE;TRIFIRO', FERRUCCIO;
2005
Abstract
The synthesis of silicalite-2 (MEL structure) is reported in order to understand the effect, on chemico-physical properties, of some parameter modifications during the synthesis, such as silica source. MEL type zeolites with intergrowth with MFI-type structure were prepared and the percentage of the two phases has been changed. The effect of synthesis parameters on crystals shape and size was investigated. Silicalite-2 catalysts were tested in the vapour phase Beckmann rearrangement of cyclohexanone oxime. In some cases interesting results leading to long catalyst lifetime (over 80 hours) and interesting caprolactam selectivity (>90%) are obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
