INVESTIGADORES
VAZQUEZ Patricia Graciela
artículos
Título:
"Tungstophosphoric and Molybdophosphoric Acids Supported on Zirconia as Esterification Catalysts"
Autor/es:
LUIS PIZZIO; PATRICIA VÁZQUEZ; CARMEN CÁCERES; MIRTA BLANCO
Revista:
CATALYSIS LETTERS
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2001 vol. 77 p. 233 - 239
ISSN:
1011-372X
Resumen:
The preparation and characterization of supported acid catalysts, based on tungstophosphoric (TPA) or molybdophosphoric (MPA) acidsusing ZrO2 as support, are presented. ZrO2 was prepared from zirconium oxychloride aqueous solutions by adding ammonium hydroxidesolution. Two different techniques were used to obtain the catalysts, equilibrium adsorption and incipient wetness impregnation. Thecatalyst characterization allowed us to determine the species present on the carrier surface and their acidic properties. The catalytic activityfor esterification of acetic acid with isoamyl alcohol of the zirconia-supported TPA catalysts was greater than that corresponding to thosebased on MPA. Moreover, in the preparative conditions used, the incipient wetness impregnation led to heteropolyacids supported on ZrO2with better catalytic performance.
