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Titolo:
Kinetic study on the effect of solvent in 'vapor-phase' Beckmann rearrangement of cyclohexanone oxime on silicalite-1
Autore:
Komatsu, T; Maeda, T; Yashima, T;
Indirizzi:
Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528550, Japan Tokyo Inst Technol Tokyo Japan 1528550 , Meguro Ku, Tokyo 1528550, Japan
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
, volume: 35-6, anno: 2000,
pagine: 173 - 180
SICI:
1387-1811(200004)35-6:<173:KSOTEO>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ZEOLITE CATALYSTS; DEACTIVATION;
Keywords:
Beckmann rearrangement; epsilon-caprolactam; cyclohexanone oxime; kinetic; silicalite; solvent; zeolite;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Komatsu, T Tokyo Inst Technol, Dept Chem, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan Tokyo Inst Technol 2-12-1 Ookayama Tokyo Japan 1528550 , Japan
Citazione:
T. Komatsu et al., "Kinetic study on the effect of solvent in 'vapor-phase' Beckmann rearrangement of cyclohexanone oxime on silicalite-1", MICROP M M, 35-6, 2000, pp. 173-180

Abstract

The effect of solvents in the 'vapor-phase' Beckmann rearrangement of cyclohexanone oxime was studied on silicalite-1 catalyst through kinetic measurements. Solvents with various polarities were examined for the reaction. Itwas found that ethanol, which has medium polarity, was effective in the formation of epsilon-caprolactam. The rate of epsilon-caprolactam formation fitted the Langmuir-type rate equation for the various solvents. This experimental rate equation was explained by the reaction scheme where the desorption of epsilon-caprolactam caused by the attack of a solvent molecule was the rate-determining step. IR measurements confirmed the desorption of epsilon-caprolactam induced by the attack of the ethanol molecule. Ethanol and methanol gave specific improvements in the yield of epsilon-caprolactam probably due to the effect of OH groups. However, alcohols with higher carbon numbers lowered the yield owing to their hydrophobic nature. Therefore, ethanol and methanol are the most effective solvents for the 'vapor-phase' Beckmann rearrangement of cyclohexanone oxime on silicalite-1. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 18/11/17 alle ore 05:51:21