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Cadmium compounds as catalysts for biodiesel production / Melquizedeque B. Alves in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp.7176–7182 Titre : Cadmium compounds as catalysts for biodiesel production Type de document : texte imprimé Auteurs : Melquizedeque B. Alves, Auteur ; Fernando C. M. Medeiros, Auteur ; Paulo A. Z. Suarez, Auteur Année de publication : 2010 Article en page(s) : pp.7176–7182 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalysts  Biodiesel Résumé : Divalent cadmium compounds, particularly CdO, were used as Lewis-acid catalysts in the hydrolysis, esterification, and transesterification of pure triacylglycerides or fatty acids obtained from neutralized soybean oil, as well as mixtures of these substrates. In more than one step, reaction yields of up to 98% in fatty acids or fatty acid methyl esters were achieved. To study the use of these reactions for the development of technologies for biodiesel production from low-grade starting materials, a study was also carried out using a real sample with a high content of free fatty acids from the Brazilian savanna palm-tree oil called Macauba (Acrocomia sclerocarpa M.). Using multistep, sequential, or combined (one-pot) reaction processes, it was possible to obtain an overall reaction yield of up to 98% in methyl esters. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100172u [article] Cadmium compounds as catalysts for biodiesel production [texte imprimé] / Melquizedeque B. Alves, Auteur ; Fernando C. M. Medeiros, Auteur ; Paulo A. Z. Suarez, Auteur . - 2010 . - pp.7176–7182. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp.7176–7182 Mots-clés : Catalysts  Biodiesel Résumé : Divalent cadmium compounds, particularly CdO, were used as Lewis-acid catalysts in the hydrolysis, esterification, and transesterification of pure triacylglycerides or fatty acids obtained from neutralized soybean oil, as well as mixtures of these substrates. In more than one step, reaction yields of up to 98% in fatty acids or fatty acid methyl esters were achieved. To study the use of these reactions for the development of technologies for biodiesel production from low-grade starting materials, a study was also carried out using a real sample with a high content of free fatty acids from the Brazilian savanna palm-tree oil called Macauba (Acrocomia sclerocarpa M.). Using multistep, sequential, or combined (one-pot) reaction processes, it was possible to obtain an overall reaction yield of up to 98% in methyl esters. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100172u

Epoxidation of methyl oleate using heterogeneous catalyst / Paulo A. Z. Suarez in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3268–3270 Titre : Epoxidation of methyl oleate using heterogeneous catalyst Type de document : texte imprimé Auteurs : Paulo A. Z. Suarez, Auteur ; Mírian S. C. Pereira, Auteur ; Kenneth M. Doll, Auteur Année de publication : 2009 Article en page(s) : pp. 3268–3270 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Alumina  Catalytic  activity  Methyl  oleate  Hydrogen  peroxide  solution Résumé : In this work, we studied the catalytic activity of commercial alumina, and laboratory-synthesized alumina doped with Lewis acid metals, in the epoxidation of methyl oleate with aqueous hydrogen peroxide. It was observed that the reaction yields increased when the amount of catalyst, the quantity of hydrogen peroxide, the concentration of the hydrogen peroxide solution, or the surface area of the catalyst was increased. Reaction yields decreased when the surface acidity of the alumina was modified by doping with Lewis acid metals. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801635b [article] Epoxidation of methyl oleate using heterogeneous catalyst [texte imprimé] / Paulo A. Z. Suarez, Auteur ; Mírian S. C. Pereira, Auteur ; Kenneth M. Doll, Auteur . - 2009 . - pp. 3268–3270. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3268–3270 Mots-clés : Alumina  Catalytic  activity  Methyl  oleate  Hydrogen  peroxide  solution Résumé : In this work, we studied the catalytic activity of commercial alumina, and laboratory-synthesized alumina doped with Lewis acid metals, in the epoxidation of methyl oleate with aqueous hydrogen peroxide. It was observed that the reaction yields increased when the amount of catalyst, the quantity of hydrogen peroxide, the concentration of the hydrogen peroxide solution, or the surface area of the catalyst was increased. Reaction yields decreased when the surface acidity of the alumina was modified by doping with Lewis acid metals. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801635b