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Titolo:
Mesoporous molecular sieve Al-MCM-41 as a novel catalyst for vapor-phase Beckmann rearrangement of cyclohexanone oxime
Autore:
Ko, AN; Hung, CC; Chen, CW; Ouyang, KH;
Indirizzi:
Tunghai Univ, Dept Chem, Taichung 40704, Taiwan Tunghai Univ Taichung Taiwan 40704 iv, Dept Chem, Taichung 40704, Taiwan
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 3-4, volume: 71, anno: 2001,
pagine: 219 - 224
SICI:
1011-372X(2001)71:3-4<219:MMSAAA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
MCM-41; ALUMINOSILICATE; CAPROLACTAM; ZEOLITES;
Keywords:
Al-MCM-41; Beckmann rearrangement; epsilon-caprolactam; cyclohexanone oxime; solid acid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Ko, AN Tunghai Univ, Dept Chem, Taichung 40704, Taiwan Tunghai Univ Taichung Taiwan 40704 t Chem, Taichung 40704, Taiwan
Citazione:
A.N. Ko et al., "Mesoporous molecular sieve Al-MCM-41 as a novel catalyst for vapor-phase Beckmann rearrangement of cyclohexanone oxime", CATAL LETT, 71(3-4), 2001, pp. 219-224

Abstract

Vapor-phase Beckmann rearrangement of cyclohexanone oxime to epsilon -caprolactam has been studied at 1 atm and 300-400 degreesC using mesoporous molecular sieve Al-MCM-41. Benzene and ethanol are utilized as solvents for cyclohexanone oxime. Increasing the reaction temperature enhances the catalyst activity and stability whereas epsilon -caprolactam selectivity varies only slightly. Ethanol exhibits much better catalytic results than benzene. Excellent catalyst performance is attained at 1 atm, 400 degreesC and W/F-C 149.2 g h/mol by using ethanol in the feed; the cyclohexanone oxime conversion and the epsilon -caprolactam selectivity remain higher than 99 and 90%,respectively, during at least 1200 h process time. The highly efficient catalysis on Al-MCM-41 is attributed to its large surface area, uniform mesopores as well as the weak and medium acidity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 05:50:48