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Synthesis and characterization of mono‐acylglycerols through the glycerolysis of methyl esters obtained from linseed oil
Author(s) -
Schulz Gracélie A. S.,
da Silveira Kelly C.,
Libardi Daniela B.,
Peralba Maria do Carmo R.,
Samios Dimitrios
Publication year - 2011
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.201100079
Subject(s) - transesterification , biodiesel , glyceride , linseed oil , glycerol , chemistry , catalysis , yield (engineering) , biodiesel production , organic chemistry , reagent , molar ratio , vegetable oil , nuclear chemistry , materials science , fatty acid , metallurgy
Here we investigate the production and characterization of mono‐acylglycerols through the glycerolysis of biodiesel, a methyl ester mixture, obtained from linseed oil. The biodiesel employed was derived from linseed oil through transesterification according to transesterification double step process 1. The efficiency of H 2 SO 4 , CaO, and NaOH as catalysts was evaluated for the production of mono‐acylglycerols. The glycerolysis reactions were performed by varying the molar ratio of the reagents (biodiesel:glycerol), the type and amount of catalyst, reaction time and temperature. Systematic evaluation of reaction yield is shown as a function of these parameters. Reaction products were characterized through IR spectroscopy, hydrogen NMR, and the GC techniques. The study of three different catalysts indicated that the most efficient was 5% NaOH in a 1:5 biodiesel–glycerol molar ratio with 10 h reaction time. The reaction reached a maximum of 85% biodiesel conversion with a mono‐acylglycerol yield of 72% at 130°C.