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Maleinization of Soybean Oil Glycerides Obtained from Biodiesel‐Derived Crude Glycerol
Author(s) -
Echeverri David A.,
Perez William A.,
Rios Luis A.
Publication year - 2013
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-013-2341-x
Subject(s) - glyceride , maleic anhydride , chemistry , glycerol , acid value , catalysis , monoglyceride , organic chemistry , titration , biodiesel , copolymer , fatty acid , biochemistry , polymer
Glycerides obtained from the glycerolysis of soybean oil with crude glycerol were acylated with maleic anhydride at 80–100 °C. Both uncatalyzed and catalyzed reactions with 2‐methylimidazole (2‐MI) were evaluated. Formation of maleated glycerides was confirmed by 1 H‐NMR and FTIR analyses. Consumption of maleic anhydride as a function of time was followed by acid value titration. High conversion (ca. 95 %) of hydroxyl groups was obtained at 90 °C in 60 min without catalyst. Under these conditions, a product with 1.9 maleate moieties per glyceride molecule was obtained. Catalyzed reactions afforded lower conversions of hydroxyl groups and lower maleate yields compared to uncatalyzed reactions.