| Titre : | Catalytic hydrogenation of dimethyl itaconate in a water-cyclohexane-triton X-100 microemulsion in comparison to a biphasic system (2008) |
| Auteurs : | Juan S. Milano-Brusco, Éditeur scientifique ; Michael Schwarze, Éditeur scientifique ; M'hamed Djennad, Éditeur scientifique |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 N°20, Octobre 2008) |
| Article en page(s) : | P. 7586-7592 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 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 |
