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Titolo:
A comparison between [Ti]-MCM-41 and amorphous mesoporous silica-titania as catalysts for the epoxidation of bulky unsaturated alcohols
Autore:
Berlini, C; Ferraris, G; Guidotti, M; Moretti, G; Psaro, R; Ravasio, N;
Indirizzi:
Ctr CNR, CSSCMTBSO, Dipartimento Chim Inorgan Metallorgan & Anali, I-20133Milan, Italy Ctr CNR Milan Italy I-20133 gan Metallorgan & Anali, I-20133Milan, Italy Ctr CNR, SACSO, Dipartimento Chim, I-00185 Rome, Italy Ctr CNR Rome Italy I-00185 SACSO, Dipartimento Chim, I-00185 Rome, Italy
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
, volume: 44, anno: 2001,
pagine: 595 - 602
SICI:
1387-1811(200106)44:<595:ACB[AA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
TERT-BUTYL HYDROPEROXIDE; TI-CONTAINING MCM-41; MOLECULAR-SIEVES; HYDROGEN-PEROXIDE; BETA CATALYST; OXIDATION; ALKENES; OLEFINS; SPECTROSCOPIES; REFLECTANCE;
Keywords:
epoxidation; heterogeneous titanium catalyst; terpene oxides; mesoporous titania-silica; tert-butyl hydroperoxide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Guidotti, M Ctr CNR, CSSCMTBSO, Dipartimento Chim Inorgan Metallorgan & Anali, Via Venezian 21, I-20133 Milan, Italy Ctr CNR Via Venezian 21 Milan Italy I-20133 0133 Milan, Italy
Citazione:
C. Berlini et al., "A comparison between [Ti]-MCM-41 and amorphous mesoporous silica-titania as catalysts for the epoxidation of bulky unsaturated alcohols", MICROP M M, 44, 2001, pp. 595-602

Abstract

The preparation of a new amorphous mesoporous silica-titania (MST) is herereported. Following a modification of the standard procedure employed in the preparation of TS-1, a material showing a narrow pore size distribution in the mesopore region (approximate to 30 A mean pore diameter) is obtained. The catalytic features, tested in the epoxidation of a series of unsaturated terpenic alcohols, were compared with those of an ordered mesoporous material as Ti-containing MCM-41. MST displayed mainly a higher activity than[Ti]-MCM-41 and a progressive increase in epoxidation rate was observed passing from bishomoallylic to allylic alcohols. Under these conditions, a global improvement in alkene conversion was achieved using methylacetate as solvent, without a remarkable loss in epoxide selectivity. During repeated recycles no significant changes in both catalytic performances and active metal content were recorded. (C) 2001 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 14/07/20 alle ore 04:37:47