Beckmann rearrangement of cyclohexanone oxime over mesoporous Si-MCM-41 and Al-MCM-41 molecular sieves

被引：70

作者：

Chaudhari, K ^{[1
]}

Bal, R ^{[1
]}

Chandwadkar, AJ ^{[1
]}

Sivasanker, S ^{[1
]}

机构：

[1] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2002年 / 177卷 / 02期

关键词：

Beckmann rearrangement; caprolactam; cyclohexanone oxime; MCM-41; mesoporous materials;

D O I：

10.1016/S1381-1169(01)00270-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Si-MCM-41 and Al-MCM-41 with different Al contents (Si/Al = 43.9, 23.3 and 14.3) have been prepared using cetyl trimethylammonium bromide as an organic surfactant and characterised by XRD, MAS NMR and N-2 sorption studies. The transformation of cyclohexanone oxime into epsilon-caprolactam has been studied over these molecular sieves. The influences of temperature and feed rate (WHSV) on the yield of caprolactam over the samples have been investigated at different times on stream. The studies reveal that activity and selectivity increase with Al content (investigated upto Si/Al = 14) and maximum yield of epsilon-caprolactam is obtained at similar to360degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：247 / 253

页数：7

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