CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
capítulos de libros
Título:
Polymer-immobilized aluminium or copper tungstophosphates and tungstosilicates as new catalysts in anisole acylation
Autor/es:
V. FUCHS; L. R. PIZZIO; MIRTA NOEMÍ BLANCO
Libro:
Studies in Surface Science and Catalysis. Scientific bases for the preparation of heterogeneous catalysts
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2006; p. 793 - 800
Resumen:
New materials with spherical shape were obtained from aluminium or copper salts of tungstophosphoric and tungstosilicic acids immobilized in a polymeric blend prepared with polyvinyl alcohol and polyethylene glycol by the freeze-thawing method. It is observed that the salts retain the Keggin structure of the heteropolyanions during their synthesis and immobilization. There is an almost constant distribution of the salts along the sphere width when they are included in the PVA-PEG blend. Also, the immobilized salts present very strong acid sites. The catalytic activity in the anisole acylation of the immobilized aluminium salts was higher than that of the catalysts obtained from the copper salts.
rds']