Abstract

Acidic lanthanum and aluminum diphosphates were prepared and characterized (surface area, XRD, FT-IR, 31P-NMR and 27Al-NMR). These materials were used as catalyst for the esterification of oleic acid and transesterification of soybean oil. Under optimized conditions the methyl and ethyl ester yields were above 95%. Although the catalysts are recyclable, they slowly lost their catalytic activities, due to leaching of the phosphate.

Recommended Citation

Marciniuk, Letícia Ledo; Garcia, Camila Martins; Muterle, Roberto Bineli; and Schuchardt, Ulf (2009) "Bioenergy II: Acid Diphosphates as Catalysts for the Production of Methyl and Ethyl Esters from Vegetable Oils," International Journal of Chemical Reactor Engineering: Vol. 7: A44.
Available at: http://www.bepress.com/ijcre/vol7/A44