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6 results on '"Chiker, F."'

1. Preparation characterization and catalytic activity of new bifunctional Ti-AlSBA15 materials. Application to a 'one pot' green synthesis of adipic acid from cyclohexanone and organic hydroperoxides

Author

Lapisardi F. Chiker F. Launay J.P. Nogier J.L. Bonardet, G., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Published
2005

2. Activité catalytique de matériaux mésoporeux structurés bifonctionnels Ti-AlSBA15: application à l'ouverture oxydante du cyclohéxène

Author

Chiker, F., Launay, Franck, Nogier, J. Ph., Bonardet, J.L., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis
Published
2004

3. Catalyseurs bifonctionnels TiAlSBA15: préparation, caractérisation et activité catalytique dans l'ouverture oxydante du cyclohéxène

Author

Chiker, F., Launay, Franck, Nogier, J. Ph., Bonardet, J.L., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis
Published
2004

4. Optimisation of gas phase deposition of titanium on mesoporous silica SBA15: active site counting and catalytic

Author

Chiker, F., Nogier, J. Ph., Launay, Franck, Bonardet, J.L., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Mesoporous catalyst, Titanium, SBA15, [CHIM.CATA]Chemical Sciences/Catalysis
Abstract

International audience; New structured mesoporous catalysts TiSBA15 were synthesised by grafting titanium atoms on the pore surface of various SBA15 materials by means of titanium tetrachloride in the gas phase. Site counting allowed us to optimise the experimental conditions in order to get the best selectivity and reactivity in the epoxidation of alkenes by various hydroperoxides in mild conditions (343–353 K). The silica based materials lead, in any case, to the selective formation of the epoxides with a high level of conversion over four catalytic runs.

Published
2004

5. New efficient catalysts Ti-SBA15 and Ti-ALSBA15 for green chemistry application to selective oxidation of alkenes

Author

Chiker, F., Launay, Franck, Nogier, J. Ph., Gedeon, A., Bonardet, J.L., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis
Abstract

International audience; New structured mesoporous catalysts TiSBA15 and Ti-AlSBA15 were synthesized by grafting titanium on the pore internal surface of various SBA15 and Al-SBA15 materials by means of titanium tetrachloride in the gas phase. These catalysts were tested in the oxidn. of alkenes by alkyl hydroperoxides in mild conditions (343-353 K). The silica based materials lead, in any case, to the selective formation of the epoxides with a high level of conversion over four catalytic runs. Al-based supports afford an efficient acid-catalyzed ring opening of oxiranes and allow the direct conversion of cyclohexene to adipic acid with a yield of 80%.

Published
2004

6. Green and selective epoxidation of alkenes catalyzed by new TiO2-SiO2 SBA solids

Author

Chiker, F., Launay, Franck, Nogier, J. Ph., Bonardet, J.L., Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis
Abstract

International audience; New catalysts TiO2–SiO2 (Ti–SBA) with pore sizes of 37 and 65 have been synthesized by grafting titanium on a structured mesoporous SBA15 (SBA for Santa BArbara and 15 for hexagonal structure) by means of titanium tetrachloride in the gas phase. These catalysts have been tested in the selective epoxidation of cyclooctene, cyclohexene, (R)-limonene and -pinene. Whatever the oxidant, hydrogen peroxide (H2O2), tert-butyl hydroperoxide (TBHP) or cumyl hydroperoxide (CHP), the selectivity is 100%. However, the yield is low with H2O2 and the catalyst is partially leached out. In the case of TBHP and CHP the epoxide yields can reach practically 100% and no leaching of titanium is observed after four successive reaction cycles. An effect of pore size on the epoxidation kinetics of -pinene and cyclooctene has been found.

Published
2003

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