http://dx.doi.org/10.1021/ie3001277">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Preparation of nanosized silicalite-1 and its application in vapor-phase beckmann rearrangement of cyclohexanone oxime

Language

English

Abstract

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. © 2012 American Chemical Society.

Publication Date

2012

Source Publication Title

Industrial and Engineering Chemistry Research

Volume

51

Issue

28

Start Page

9492

End Page

9499

Publisher

American Chemical Society

ISSN (print)

08885885

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