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Titolo:
Carbonylation of tert-butyl alcohol over H-zeolites
Autore:
Xu, Q; Inoue, S; Tsumori, N; Mori, H; Kameda, M; Tanaka, M; Fujiwara, M; Souma, Y;
Indirizzi:
Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan Natl Inst AdvInd Sci & Technol Ikeda Osaka Japan 5638577 5638577, Japan
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
fascicolo: 1-2, volume: 170, anno: 2001,
pagine: 147 - 153
SICI:
1381-1169(20010514)170:1-2<147:COTAOH>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONCENTRATED SULFURIC-ACID; SOLID-STATE NMR; CARBON-MONOXIDE; CATALYTIC DEHYDRATION; AMORPHOUS ALUMINOSILICATE; SULFATED ZIRCONIA; PORE CONFINEMENT; ISOBUTYL ALCOHOL; CARBOXYLIC-ACIDS; H-ZSM-5 ZEOLITE;
Keywords:
carbonylation; alcohols; solid acids; zeolites; carboxylic acids;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Xu, Q Natl Inst Adv Ind Sci & Technol, 1-8-31 Midorigaoka, Ikeda, Osaka 5638577,Japan Natl Inst Adv Ind Sci & Technol 1-8-31 Midorigaoka Ikeda Osaka Japan 5638577
Citazione:
Q. Xu et al., "Carbonylation of tert-butyl alcohol over H-zeolites", J MOL CAT A, 170(1-2), 2001, pp. 147-153

Abstract

The Koch-type carbonylation of tert-butyl alcohol was studied over H-type zeolites. It was found that the catalytic carbonylation of a large amount of tert-butyl alcohol relative to the acidic sites of the H-zeolites in organic solvents requires an elevated temperature and CO pressure, although previous solid state NMR studies have revealed that the transformation of tert-butyl alcohol of an amount comparable to the acidic sites into 2,2-dimethylpropanoic acid proceeds just upon the CO co-adsorption in the H-zeolites at room temperature and atmospheric pressure. The catalytic performance of different H-zeolites and the influence of CO pressure, H2O addition and solvent effects on the carbonylation of tert-butyl alcohol have been investigated. H-ZSM-5 gives the highest selectivity for 2,2-dimethylpropanoic acid due to its adequate pore dimensions. The present work indicates the possible industrial application of solid acids as carbonylation catalysts instead ofLiquid acids for the Koch reaction to produce tert-carboxylic acids. (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 09/04/20 alle ore 19:53:39