INVESTIGADORES
DE MIGUEL sergio Ruben
artículos
Título:
Effect of lithium addition upon -Al2O3 for isopropanol dehydration
Autor/es:
SERGIO R. DE MIGUEL; ALFONSO CABALLERO MARTINEZ; ALBERTO A. CASTRO; OSVALDO A. SCELZA
Revista:
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Editorial:
SCI
Referencias:
Año: 1996 vol. 65 p. 131 - 136
ISSN:
0268-2575
Resumen:
The effect of lithium addition to -Al2O3 on the acidity and on the catalytic behaviour in the isopropanol dehydration reaction is studied. Results show that there is an important blocking or poisoning effect of lithium on the Lewis Al3+ sites of the alumina surface; these sites play an important role in the isopropanol dehydration reaction to di-isopropylether and propylene. The di-isopropylether formation is drastically reduced by lithium addition, while the propylene formation can be maintained, even at a high lithium content, by increasing the reaction temperature. Results are interpreted by considering that the ether would be produced by a concerted mechanism (E2), and the olefin formation could be carried out by both E2 or E1 mechanisms.
