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Regioselective mononitration of aromatic compounds using keggin heteropolyacid anion based bronsted acidic ionic salts / Hongwei Yang in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11440-11444 Titre : Regioselective mononitration of aromatic compounds using keggin heteropolyacid anion based bronsted acidic ionic salts Type de document : texte imprimé Auteurs : Hongwei Yang, Auteur ; Xiufang Qi, Auteur ; Liang Wen, Auteur Année de publication : 2011 Article en page(s) : pp. 11440-11444 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : 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 [article] Regioselective mononitration of aromatic compounds using keggin heteropolyacid anion based bronsted acidic ionic salts [texte imprimé] / Hongwei Yang, Auteur ; Xiufang Qi, Auteur ; Liang Wen, Auteur . - 2011 . - pp. 11440-11444. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11440-11444 Mots-clés : 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