CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
? Preparation and evaluation of Rh-CoMo6 anderson phases supported on porous heterostructured clays for clean oxidation of diphenilsulfide
Autor/es:
E. PUELLO POLO, L. LAPUENTE, G. BERTOLINI, M. MUÑOZ, G. ROMANELLI, I. BOTTO AND C. CABELLO.
Lugar:
Cancun
Reunión:
Congreso; XX International. Materials Research Congress.; 2011
Resumen:
Clay minerals from Argentinian deposits were characterized and chemically modified by
conventional methods to obtain porous heterostructured supports (PCH). Then, PCH was
functionalized with an amino-silane agent in order to obtain appropriate surface for the
adsorption of HPOMs Anderson type [MMo6O24H6]3- with M= Co (III) and Rh (III) and a
structural derivate, [Co2Mo10H4O38]6-. The characterization of the modified and
impregnated materials was carried out by XRD, ESEM-EDS, Raman, AAS and SBET. The
results of chemical analysis by AAS showed a concentration between 8 and 14 % of Mo
adsorbed on the catalysts. The analysis by physico-chemical techniques revealed an
interaction between Mo=O groups (active catalytic sites) and the surface of PCH. The
catalytic evaluation showed selectivity to sulfone (> 90 %). The CoMo6 system was
selective to sulfoxide (83 % selectivity) only in the first stage of the process. The activity
was correlated with presence of noble metal in the system containing Rh (III) and with
less symmetries of the molecule in Co2Mo10 system which its higher catalytic activity is
associated to the active sites availability.