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Epoxidation of unsaturated FAMEs obtained from vegetable source over Ti(IV)-grafted silica catalysts: A comparison between ordered and non-ordered mesoporous materials |
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| Authors: | Matteo Guidotti Nicoletta Ravasio Rinaldo Psaro Enrica Gianotti Salvatore Coluccia Leonardo Marchese |
| Institution: | aCNR-ISTM, Centro CIMAINA and Dip. Chimica Inorganica, Metallorganica e Analitica, via G. Venezian 21, 20133 Milano, Italy bDipartimento di Chimica IFM, Università di Torino, via P. Giuria 7, 10125 Torino, Italy cDipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, via V. Bellini 25/G, 15100 Alessandria, Italy |
| Abstract: | The liquid-phase epoxidation of mixtures of fatty acid methyl esters (FAMEs) over titanium-containing silica materials, using tert-butylhydroperoxide (TBHP) as oxidant, is here reported. The mixtures were obtained from vegetable renewable source, i.e. from high-oleic sunflower oil, coriander oil, castor oil and soya-bean oil. The influence of the nature and the position of functional groups on the C-18 chain of the FAMEs was studied. Very high activity and selectivity were obtained in the epoxidation of castor and soya-bean oil methyl esters in a reaction medium free from organic acids. Ti–MCM-41 (an ordered mesoporous titanium-grafted silica) displayed in this case, for the first time, superior performances, from a synthetic point of view, with respect to non-ordered mesoporous titanosilicates. |
| Keywords: | Catalytic epoxidation Fatty acid methyl ester Mesoporous solids Renewable raw materials Titanium catalysts |
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