Return to search

Catalytic properties of V2O5/SnO2 towards vapour-phase Beckmann rearrangement of cyclohexanone oxime

A B S T R A C T
V2O5/SnO2 solid acid catalysts have been employed for the vapour-phase Beckmann rearrangement of
cyclohexanone oxime to e-caprolactam. Catalysts with different vanadia loading (3–15 wt%) were
prepared by impregnation method and characterized by XRD, BET surface area, FTIR and 51V NMR
techniques. The surface acidic properties were determined by temperature programmed desorption and
cumene cracking reaction. Under optimized reaction conditions, catalyst with 9 wt% V2O5 gives the
maximum amount of desired product (yield 78.8%). However, the catalysts are susceptible for
deactivation due to the basic nature of the reaction products (50% deactivation in 5 h). A good correlation
was obtained among the rearrangement activities of V2O5/SnO2 catalysts, their weak plus medium
acidities (usually of the Bro¨ nsted type) and structural properties.

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001694
Date31 October 2008
CreatorsPillai, SK, Gheevarghese, O, Sugunan, S
PublisherElsevier
Source SetsSouth African National ETD Portal
LanguageEnglish
Detected LanguageEnglish
TypeText
FormatPdf
Rights(C)2008 Elsevier B.V.
RelationApplied Catalysis A: General

Page generated in 0.002 seconds