| Titre : | Ionic liquid as catalyst for solid-Liquid Phase transfer catalyzed synthesis of p-Nitrodiphenyl ether (2009) |
| Auteurs : | Ganapati D. Yadav, Auteur ; Bhavana G. Motirale, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 N° 23, Décembre 2008) |
| Article en page(s) : | p. 9081–9089 |
| Note générale : | Chemistry engineering |
| Langues : | Anglais |
| Tags : | Synthesis of p-Nitrodiphenyl Ethe |
| Résumé : | The novelties of solid−liquid phase transfer catalyzed synthesis of p-nitrodiphenyl ether from p-nitrochlorobenzene and potassium phenoxide were studied in detail with ionic liquids as phase transfer catalysts among others. Tetradecyl(trihexyl)phosphonium bromide was found to be the best catalyst leading to 100% selectivity toward the desired product p-nitrodiphenyl ether. Ionic liquids offer excellent conversions and selectivity, stability at high temperatures, and reusability in this reaction. A mathematical model was developed to study the kinetics of the reaction and used to extract both the rate constant and ion-exchange equilibrium constant. The contribution of the uncatalyzed reaction was also considered in this model. The activation energy and Gibb’s free energy for a combined ion exchange were also calculated. Microwave irradiation was also employed as an effective alternative to conventional heating. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie800340j |
