Documents disponibles écrits par cet auteur

Catalytic hydrogenation of dimethyl itaconate in a water-cyclohexane-triton X-100 microemulsion in comparison to a biphasic system / Juan S. Milano-Brusco in Industrial & engineering chemistry research, Vol. 47 N°20 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7586-7592 Titre : Catalytic hydrogenation of dimethyl itaconate in a water-cyclohexane-triton X-100 microemulsion in comparison to a biphasic system Type de document : texte imprimé Auteurs : Juan S. Milano-Brusco, Editeur scientifique ; Michael Schwarze, Editeur scientifique ; M'hamed Djennad, Editeur scientifique Année de publication : 2008 Article en page(s) : P. 7586-7592 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Catalytic  hydrogenation  Dimethyl  itaconate  (DMI) Résumé : The kinetics of the catalytic hydrogenation of dimethyl itaconate (DMI) was studied in a biphasic cyclohexane−water system and in a [Triton X-100/1-pentanol]/cyclohexane/water microemulsion, in both cases using the water-soluble catalyst complex Rh−TPPTS. The reaction was carried out at a pressure of 1.1 bar and in the temperature range 298−308 K. A typical profile of a zero-order reaction was observed in the case of the biphasic system. Against that the reaction order for DMI changed to 1 in a microemulsion. A rate law based on an Osborn−Wilkinson-like kinetics was used to describe the experimental results which were governed by the irreversible attack of free DMI at the rhodium complex. The activation energy of the rate-determining step is 53 kJ mol−1 and is similar in both systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800190g [article] Catalytic hydrogenation of dimethyl itaconate in a water-cyclohexane-triton X-100 microemulsion in comparison to a biphasic system [texte imprimé] / Juan S. Milano-Brusco, Editeur scientifique ; Michael Schwarze, Editeur scientifique ; M'hamed Djennad, Editeur scientifique . - 2008 . - P. 7586-7592. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7586-7592 Mots-clés : Catalytic  hydrogenation  Dimethyl  itaconate  (DMI) Résumé : The kinetics of the catalytic hydrogenation of dimethyl itaconate (DMI) was studied in a biphasic cyclohexane−water system and in a [Triton X-100/1-pentanol]/cyclohexane/water microemulsion, in both cases using the water-soluble catalyst complex Rh−TPPTS. The reaction was carried out at a pressure of 1.1 bar and in the temperature range 298−308 K. A typical profile of a zero-order reaction was observed in the case of the biphasic system. Against that the reaction order for DMI changed to 1 in a microemulsion. A rate law based on an Osborn−Wilkinson-like kinetics was used to describe the experimental results which were governed by the irreversible attack of free DMI at the rhodium complex. The activation energy of the rate-determining step is 53 kJ mol−1 and is similar in both systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800190g

Catalytic reactions in surfactant systems / Juan S. Milano-Brusco in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1098–1104 Titre : Catalytic reactions in surfactant systems : product isolation and catalyst recycling Type de document : texte imprimé Auteurs : Juan S. Milano-Brusco, Auteur ; Henriette Nowothnick, Auteur ; Michael Schwarze, Auteur Année de publication : 2010 Article en page(s) : pp. 1098–1104 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Catalytic--Surfactant--Systems--SurfactanIsolation--Catalyst--Recycling--  Reactions Résumé : The potential of surfactant based reaction media was studied with different homogeneous catalytic reactions. Micellar systems with the surfactants (p-tert-octylphenoxy) polyethoxyethanol (Triton X-100) and dodecyl sulfate sodium salt were used as reaction media for the enantioselective catalytic hydrogenation of dimethyl itaconate (DMI) with the Rh catalyst complexed with the chiral ligand (2S,4S)-1-tert-butoxycarbonyl-4-diphenylphosphino-2-(diphenylphosphinometyl)-pyrrolidine (BPPM) at 30 °C and 1.1 bar, obtaining an enantiomeric excess (ee) of up to 69%. After complete hydrogenation was achieved, micellar enhanced ultrafiltration (MEUF) was used to recycle the catalyst achieving up to 95% retention. A microemulsion system stabilized with the surfactant Triton X-100 was used as alternative reaction media for the hydrogenation of DMI with a Rh catalyst complexed with the water-soluble tris(3-sulfophenyl)phosphine trisodium salt (TPPTS) at 50 °C and 1.1 bar. With the Triton X-100 system, phase separation by temperature induced separation allowed for up to four repetitive batches of DMI hydrogenations, resulting in a TON of 1530. Suzuki coupling for the synthesis of 4′-methyl-2-biphenylcarbonitrile proceeded faster in a narrow range alkylpolyglycol ether (Novel 8 = Novel 1216CO-8 Ethoxylate) three-phase system than in an dioctyl sulfosuccinate sodium salt (AOT) two-phase system, demonstrating the retarding effect of the salinization on the reaction rate. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900753t [article] Catalytic reactions in surfactant systems : product isolation and catalyst recycling [texte imprimé] / Juan S. Milano-Brusco, Auteur ; Henriette Nowothnick, Auteur ; Michael Schwarze, Auteur . - 2010 . - pp. 1098–1104. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1098–1104 Mots-clés : Catalytic--Surfactant--Systems--SurfactanIsolation--Catalyst--Recycling--  Reactions Résumé : The potential of surfactant based reaction media was studied with different homogeneous catalytic reactions. Micellar systems with the surfactants (p-tert-octylphenoxy) polyethoxyethanol (Triton X-100) and dodecyl sulfate sodium salt were used as reaction media for the enantioselective catalytic hydrogenation of dimethyl itaconate (DMI) with the Rh catalyst complexed with the chiral ligand (2S,4S)-1-tert-butoxycarbonyl-4-diphenylphosphino-2-(diphenylphosphinometyl)-pyrrolidine (BPPM) at 30 °C and 1.1 bar, obtaining an enantiomeric excess (ee) of up to 69%. After complete hydrogenation was achieved, micellar enhanced ultrafiltration (MEUF) was used to recycle the catalyst achieving up to 95% retention. A microemulsion system stabilized with the surfactant Triton X-100 was used as alternative reaction media for the hydrogenation of DMI with a Rh catalyst complexed with the water-soluble tris(3-sulfophenyl)phosphine trisodium salt (TPPTS) at 50 °C and 1.1 bar. With the Triton X-100 system, phase separation by temperature induced separation allowed for up to four repetitive batches of DMI hydrogenations, resulting in a TON of 1530. Suzuki coupling for the synthesis of 4′-methyl-2-biphenylcarbonitrile proceeded faster in a narrow range alkylpolyglycol ether (Novel 8 = Novel 1216CO-8 Ethoxylate) three-phase system than in an dioctyl sulfosuccinate sodium salt (AOT) two-phase system, demonstrating the retarding effect of the salinization on the reaction rate. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900753t

Catalytic reactions in surfactant systems / Juan S. Milano-Brusco in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1098–1104 Titre : Catalytic reactions in surfactant systems : product isolation and catalyst recycling Type de document : texte imprimé Auteurs : Juan S. Milano-Brusco, Auteur ; Henriette Nowothnick, Auteur ; Michael Schwarze, Auteur Année de publication : 2010 Article en page(s) : pp. 1098–1104 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Catalytic--Surfactant--Systems--Isolation--Product--Catalyst  Recycling Résumé : The potential of surfactant based reaction media was studied with different homogeneous catalytic reactions. Micellar systems with the surfactants (p-tert-octylphenoxy) polyethoxyethanol (Triton X-100) and dodecyl sulfate sodium salt were used as reaction media for the enantioselective catalytic hydrogenation of dimethyl itaconate (DMI) with the Rh catalyst complexed with the chiral ligand (2S,4S)-1-tert-butoxycarbonyl-4-diphenylphosphino-2-(diphenylphosphinometyl)-pyrrolidine (BPPM) at 30 °C and 1.1 bar, obtaining an enantiomeric excess (ee) of up to 69%. After complete hydrogenation was achieved, micellar enhanced ultrafiltration (MEUF) was used to recycle the catalyst achieving up to 95% retention. A microemulsion system stabilized with the surfactant Triton X-100 was used as alternative reaction media for the hydrogenation of DMI with a Rh catalyst complexed with the water-soluble tris(3-sulfophenyl)phosphine trisodium salt (TPPTS) at 50 °C and 1.1 bar. With the Triton X-100 system, phase separation by temperature induced separation allowed for up to four repetitive batches of DMI hydrogenations, resulting in a TON of 1530. Suzuki coupling for the synthesis of 4′-methyl-2-biphenylcarbonitrile proceeded faster in a narrow range alkylpolyglycol ether (Novel 8 = Novel 1216CO-8 Ethoxylate) three-phase system than in an dioctyl sulfosuccinate sodium salt (AOT) two-phase system, demonstrating the retarding effect of the salinization on the reaction rate. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900753t [article] Catalytic reactions in surfactant systems : product isolation and catalyst recycling [texte imprimé] / Juan S. Milano-Brusco, Auteur ; Henriette Nowothnick, Auteur ; Michael Schwarze, Auteur . - 2010 . - pp. 1098–1104. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1098–1104 Mots-clés : Catalytic--Surfactant--Systems--Isolation--Product--Catalyst  Recycling Résumé : The potential of surfactant based reaction media was studied with different homogeneous catalytic reactions. Micellar systems with the surfactants (p-tert-octylphenoxy) polyethoxyethanol (Triton X-100) and dodecyl sulfate sodium salt were used as reaction media for the enantioselective catalytic hydrogenation of dimethyl itaconate (DMI) with the Rh catalyst complexed with the chiral ligand (2S,4S)-1-tert-butoxycarbonyl-4-diphenylphosphino-2-(diphenylphosphinometyl)-pyrrolidine (BPPM) at 30 °C and 1.1 bar, obtaining an enantiomeric excess (ee) of up to 69%. After complete hydrogenation was achieved, micellar enhanced ultrafiltration (MEUF) was used to recycle the catalyst achieving up to 95% retention. A microemulsion system stabilized with the surfactant Triton X-100 was used as alternative reaction media for the hydrogenation of DMI with a Rh catalyst complexed with the water-soluble tris(3-sulfophenyl)phosphine trisodium salt (TPPTS) at 50 °C and 1.1 bar. With the Triton X-100 system, phase separation by temperature induced separation allowed for up to four repetitive batches of DMI hydrogenations, resulting in a TON of 1530. Suzuki coupling for the synthesis of 4′-methyl-2-biphenylcarbonitrile proceeded faster in a narrow range alkylpolyglycol ether (Novel 8 = Novel 1216CO-8 Ethoxylate) three-phase system than in an dioctyl sulfosuccinate sodium salt (AOT) two-phase system, demonstrating the retarding effect of the salinization on the reaction rate. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900753t