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Dimerization of fatty acid methyl ester using Brönsted - Lewis acidic ionic liquid as catalyst / Shiwei Liu in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011) 

Public ISBD [article]  in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.396–399 Titre : Dimerization of fatty acid methyl ester using Brönsted - Lewis acidic ionic liquid as catalyst Type de document : texte imprimé Auteurs : Shiwei Liu, Auteur ; Hongxia Zhou, Auteur ; Shitao Yu, Auteur Année de publication : 2012 Article en page(s) : pp.396–399 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Brönsted  –  Lewis  acidic  ionic  liquid  Fatty  acid  methyl  esters  Dimerization  Catalysis Résumé : The dimerization of fatty acid methyl ester was investigated using Brönsted–Lewis acidic ionic liquids (ILs) as catalysts. It is found that IL (3-sulfonic acid)-propyl-triethylammonium chlorozincinate [HO3S–(CH2)3–NEt3]Cl–ZnCl2 (x = 0.64, x: molar fraction of ZnCl2, x = moles of ZnCl2/(moles of ZnCl2 + moles of ammonium salt) was of good catalytic performance. Under the optimum conditions m(biodiesel):m(IL) 15:1, biodiesel 15 g, reaction temperature 240 °C, and reaction time 5 h, the yield of product dimeric acid methyl ester was 96.8%. The reusability of IL was good and after it was used five times, the dimeric acid methyl ester yield was still more than 94%. Otherwise, a synergetic effect of Brönsted and Lewis acid sites enhanced the catalytic performance of the IL. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010758 [article] Dimerization of fatty acid methyl ester using Brönsted - Lewis acidic ionic liquid as catalyst [texte imprimé] / Shiwei Liu, Auteur ; Hongxia Zhou, Auteur ; Shitao Yu, Auteur . - 2012 . - pp.396–399. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.396–399 Mots-clés : Brönsted  –  Lewis  acidic  ionic  liquid  Fatty  acid  methyl  esters  Dimerization  Catalysis Résumé : The dimerization of fatty acid methyl ester was investigated using Brönsted–Lewis acidic ionic liquids (ILs) as catalysts. It is found that IL (3-sulfonic acid)-propyl-triethylammonium chlorozincinate [HO3S–(CH2)3–NEt3]Cl–ZnCl2 (x = 0.64, x: molar fraction of ZnCl2, x = moles of ZnCl2/(moles of ZnCl2 + moles of ammonium salt) was of good catalytic performance. Under the optimum conditions m(biodiesel):m(IL) 15:1, biodiesel 15 g, reaction temperature 240 °C, and reaction time 5 h, the yield of product dimeric acid methyl ester was 96.8%. The reusability of IL was good and after it was used five times, the dimeric acid methyl ester yield was still more than 94%. Otherwise, a synergetic effect of Brönsted and Lewis acid sites enhanced the catalytic performance of the IL. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010758