Abstract
Transesterification of soybean oil (SBO) and other triglycerides with alcohols, in the presence of a catalyst, yields fatty esters and glycerol. Di- and monoglycerides are intermediates. Reactions are consecutive and reversible. Rate constants have been determined for each reaction with a computerized kinetic program. The effects of the type of alcohol, 1-butanol or methanol (MeOH); molar ratio of alcohol to SBO; type and amount of catalyst; and reaction temperature on rate constants and kinetic order were examined. Forward reactions appear to be pseudo-first order or second order depending upon conditions used. Reverse reactions appear to be second order. At a molar ratio of MeOH/SBO of 6:1, a shunt reaction was observed. Energy of activation was determined for all forward and reverse reactions under a variety of experimental conditions from plots of log k vs 1/T. Values ranged from 8–20 kcal/mol.
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1Presented at the AOCS meeting in Philadelphia, PA, May, 1985.
2 Deceased.
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Freedman, B., Butterfield, R.O. & Pryde, E.H. Transesterification kinetics of soybean oil 1. J Am Oil Chem Soc 63, 1375–1380 (1986). https://doi.org/10.1007/BF02679606
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DOI: https://doi.org/10.1007/BF02679606