A Rh/Al system with rhodium nanocrystals was prepared by reducing rhodium trichloride supported on silica with lithium aluminum hydride at low temperature in THF. After pretreatment in Ar and in CO/H-2 the system was found to be an active catalyst of vapour phase propene hydroformylation at atmospheric pressure. The nature and composition of the active surface was studied by X-ray diffraction, X-ray photoemission spectroscopy (XPS) and Fourier transform-IR spectroscopy. Regioselectivity and chemoselectivity data are correlated to the proposed nature and morphology of the active sites of the catalyst derived from spectroscopic data. The Rh/Al system is compared with the Rh/B system we described in preceding papers.
VAPOR-PHASE PROPENE HYDROFORMYLATION CATALYZED BY THE RH/AL SYSTEM ON SILICA / Lenarda, M; Ganzerla, R; Enzo, Stefano; Storaro, L; Zanoni, R; RI Zanoni Robertino/A 1742, 2008. - In: JOURNAL OF MOLECULAR CATALYSIS. - ISSN 0304-5102. - 80:1(1993), pp. 105-116. [10.1016/0304-5102(93)87113-M]
VAPOR-PHASE PROPENE HYDROFORMYLATION CATALYZED BY THE RH/AL SYSTEM ON SILICA
ENZO, Stefano;
1993-01-01
Abstract
A Rh/Al system with rhodium nanocrystals was prepared by reducing rhodium trichloride supported on silica with lithium aluminum hydride at low temperature in THF. After pretreatment in Ar and in CO/H-2 the system was found to be an active catalyst of vapour phase propene hydroformylation at atmospheric pressure. The nature and composition of the active surface was studied by X-ray diffraction, X-ray photoemission spectroscopy (XPS) and Fourier transform-IR spectroscopy. Regioselectivity and chemoselectivity data are correlated to the proposed nature and morphology of the active sites of the catalyst derived from spectroscopic data. The Rh/Al system is compared with the Rh/B system we described in preceding papers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
