| Titre : | Regioselective mononitration of aromatic compounds using keggin heteropolyacid anion based bronsted acidic ionic salts (2011) |
| Auteurs : | Hongwei Yang, Auteur ; Xiufang Qi, Auteur ; Liang Wen, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 19, Octobre 2011) |
| Article en page(s) : | pp. 11440-11444 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Aromatic compounds Acidic ionic salts |
| Résumé : | Novel Keggin heteropolyacid anion based Brønsted acidic ionic salts [SO3H(CH2)4Mim]nH3–nPMo12O40 (n = 1, 2, 3) were synthesized and used as catalysts in the nitration of aromatic compound in HNO3 (67%). The catalytic activity was in the order of [(CH2)4SO3HMim]3PMo12O40 > [(CH2)4SO3HMim]2HPMo12O40 > [(CH2)4SO3HMim]H2PMo12O40. The effect of catalyst loading, quantity of nitro acid and temperature on nitration of toluene was discussed, and 87.7% yield and good para selectivity with 1.19 ratio of ortho to para can be obtained with optimized catalyst [(CH2)4SO3HMim]3PMo12O40. The catalyst can be easily separated from the products and recycled for three times without significant loss of activity. |
| DEWEY : | 660 |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie201028d |
