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The [Bmim]4W10O23 catalyzed oxidation of 3,4-diaminofurazan to 3,4-dinitrofurazan in hydrogen peroxide / Hua-Ping Ren in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6615–6619 Titre : The [Bmim]4W10O23 catalyzed oxidation of 3,4-diaminofurazan to 3,4-dinitrofurazan in hydrogen peroxide Type de document : texte imprimé Auteurs : Hua-Ping Ren, Auteur ; Zhong-Wen Liu, Auteur ; Jian Lu, Auteur Année de publication : 2011 Article en page(s) : pp 6615–6619 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : catalyzed  oxidation  Hydrogen  Peroxide. Résumé : -Methyl-3-butylimidazolium decatungstate ([C8H15N2]4W10O23, [Bmim]4W10O23) was prepared from 1-butyl-3-methylimidazolium bromide and sodium tungstate in hydrochloric acid solution. With the use of [Bmim]4W10O23 as the catalyst and 50% H2O2 as the oxidant, 3,4-dinitrofurazan (, DNF) was synthesized from 3,4-diaminofurazan (, DAF) in concentrated H2SO4. At a temperature of 35 °C, this process significantly increased the DNF yield from 39% to 58%, when compared with that with the conventional Na2WO4·2H2O catalyst under the same conditions. The effects of catalyst, reaction time, and temperature were investigated. A maximum DNF yield of 58% was obtained under optimal reaction conditions: 0.03 g of [Bmim]4W10O23, H2O2/H2SO4 molar ratio of 1.5:1, temperature and reaction time of 35 °C and 210 min, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200009g [article] The [Bmim]4W10O23 catalyzed oxidation of 3,4-diaminofurazan to 3,4-dinitrofurazan in hydrogen peroxide [texte imprimé] / Hua-Ping Ren, Auteur ; Zhong-Wen Liu, Auteur ; Jian Lu, Auteur . - 2011 . - pp 6615–6619. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6615–6619 Mots-clés : catalyzed  oxidation  Hydrogen  Peroxide. Résumé : -Methyl-3-butylimidazolium decatungstate ([C8H15N2]4W10O23, [Bmim]4W10O23) was prepared from 1-butyl-3-methylimidazolium bromide and sodium tungstate in hydrochloric acid solution. With the use of [Bmim]4W10O23 as the catalyst and 50% H2O2 as the oxidant, 3,4-dinitrofurazan (, DNF) was synthesized from 3,4-diaminofurazan (, DAF) in concentrated H2SO4. At a temperature of 35 °C, this process significantly increased the DNF yield from 39% to 58%, when compared with that with the conventional Na2WO4·2H2O catalyst under the same conditions. The effects of catalyst, reaction time, and temperature were investigated. A maximum DNF yield of 58% was obtained under optimal reaction conditions: 0.03 g of [Bmim]4W10O23, H2O2/H2SO4 molar ratio of 1.5:1, temperature and reaction time of 35 °C and 210 min, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200009g