Issue 9, 2015
From the journal:

RSC Advances

Preparation and characterization of activated montmorillonite clay supported 11-molybdo-vanado-phosphoric acid for cyclohexene oxidation

S. Boudjema,a   E. Vispe,b   A. Choukchou-Braham,*a   J. A. Mayoral,b   R. Bachira  and  J. M. Fraileb  

* Corresponding authors

a Laboratoire de Catalyse et Synthèse en Chimie Organique, Faculté des Sciences, Université de Tlemcen, Algeria
E-mail: cba@mail.univ-tlemcen.dz

b Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, Pedro Cerbuna, 12, E-50009 Zaragoza, Spain

Abstract

A new heterogeneous catalyst (PVMo/bentonite), consisting of vanadium substituted polyphosphomolybdate with Keggin structure H4[PVMo11O40]·13H2O (PVMo) supported on acid activated bentonite (clay from Hammam Boughrara, Maghnia, Algeria), was prepared by witness impregnation and characterized by X-ray diffraction, BET, Fourier-transformed infrared spectroscopy, 31P NMR, UV-vis diffuse reflectance spectroscopy and thermogravimetric & differential thermal analysis (TG-DTA). X-ray diffraction indicated that PVMo was properly loaded on bentonite as a support. Heterogenization of homogenous catalysts is really interesting, as heterogeneous catalysts are recoverable. Therefore, the synthesized materials can be used as efficient heterogeneous catalysts for epoxidation of cyclohexene. The obtained results showed that a better catalytic activity can be obtained with PVMo/bentonite (81.5% of conversion), by drop addition of H2O2, for 3 hours.

Graphical abstract: Preparation and characterization of activated montmorillonite clay supported 11-molybdo-vanado-phosphoric acid for cyclohexene oxidation

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Article information

DOI
https://doi.org/10.1039/C4RA13604G
Article type
Paper
Submitted
01 Nov 2014
Accepted
10 Dec 2014
First published
12 Dec 2014

RSC Adv., 2015,5, 6853-6863

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Preparation and characterization of activated montmorillonite clay supported 11-molybdo-vanado-phosphoric acid for cyclohexene oxidation

S. Boudjema, E. Vispe, A. Choukchou-Braham, J. A. Mayoral, R. Bachir and J. M. Fraile, RSC Adv., 2015, 5, 6853 DOI: 10.1039/C4RA13604G

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