Comptes Rendus Chimie p. 482 - 492 (2012)
Update date:2022-08-11
Topics:
Dakkach, Mohamed
Atlamsani, Ahmed
Sebti, Sa?d
In this work, we have studied the catalytic oxidative cleavage of C-C bonds of cycloalkanones and α-ketols, in the presence of natural phosphate (NP) type fluorapatite, Ca10(PO4)6F2, and dioxygen. The aim was to find a heterogeneous system clean and efficient alternative to the industrial oxidation of cyclohexanone to adipic acid with nitric acid. The modification of the NP by vanadium leads to the preparation of a new catalyst V/PN. The latter was characterized by: XRD, FTIR, SEM and BET. It appears that vanadium is well dispersed on the surface of the NP. Using 2-methylcyclohexanone as model substrate, we optimized the conditions of reaction in order to make the system 'V/PN/O2' more performance. The comparative study between the two catalytic systems 'PN/O2' and 'V/PN/O2' shows that the latter is more active. Finally, the system 'V/PN/O2' has been recycled but low leaching of vanadium was observed in the first use of the catalyst.
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