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Titolo:
B2O3/ZrO2 for Beckmann rearrangement of cyclohexanone oxime: optimizing ofthe catalyst and reaction atmosphere
Autore:
Xu, BQ; Cheng, SB; Zhang, X; Zhu, QM;
Indirizzi:
Tsing Hua Univ, State Key Lab Coordinat Chem, Beijing 100084, Peoples R China Tsing Hua Univ Beijing Peoples R China 100084 ng 100084, Peoples R China Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China Tsing Hua UnivBeijing Peoples R China 100084 ng 100084, Peoples R China SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China SINOPEC Beijing Peoples R China 100083 , Beijing 100083, Peoples R China
Titolo Testata:
CATALYSIS TODAY
fascicolo: 2-4, volume: 63, anno: 2000,
pagine: 275 - 282
SICI:
0920-5861(200012)63:2-4<275:BFBROC>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLID-ACID CATALYSTS; SUPPORTED BORIA CATALYST; CAPROLACTAM; ZEOLITE;
Keywords:
pre-calcination temperature; catalyst preparation; B2O3/ZrO2; Beckmann rearrangement; cyclohexanone oxime;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Xu, BQ Tsing Hua Univ, State Key Lab Coordinat Chem, Beijing 100084, Peoples R China Tsing Hua Univ Beijing Peoples R China 100084 84, Peoples R China
Citazione:
B.Q. Xu et al., "B2O3/ZrO2 for Beckmann rearrangement of cyclohexanone oxime: optimizing ofthe catalyst and reaction atmosphere", CATAL TODAY, 63(2-4), 2000, pp. 275-282

Abstract

Optimization of zirconia-supported boria catalyst for the Beckmann rearrangement of cyclohexanone oxime was studied with the control of three preparation parameters: the temperature of support pre-calcination (PCT: 110-700 degreesC), the calcination temperature for the catalyst activation (CAT: 250-600 degreesC), and the load level of boria. When the CAT is limited no higher than 500 degreesC, the lactam yield increases with the PCT and shows maximum numbers with PCT = 350-500 degreesC. This effect of PCT seems not important for the catalyst preparation when the late catalyst activation is done with CAT as high as 600 degreesC. Catalyst preparations with CAT = 600 degreesC agrees with the model that the optimized catalyst has, on the average, about two surface overlayers of boria on the support. Another part of this work focused on effects of the reaction solvents and carrier gases. A remarkable benefit for the lactam synthesis is observed with proper combination of the solvents and carrier gases: (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 05:51:05