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Kinetics of oxirane cleavage in epoxidized soybean oil
Author(s) -
Zaher F. A.,
ElMallah M. H.,
ElHefnawy M. M.
Publication year - 1989
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/bf02669955
Subject(s) - epoxidized soybean oil , epoxide , acetic acid , kinetics , activation energy , chemistry , yield (engineering) , cleavage (geology) , order of reaction , reaction rate constant , kinetic energy , organic chemistry , catalysis , materials science , raw material , physics , quantum mechanics , fracture (geology) , composite material , metallurgy
Abstract The kinetics of oxirane ring cleavage in epoxidized soybean oil have been studied using glacial acetic acid at 60, 70, 80 and 90°C. It was shown that the reaction can be successfully modelled as first order with respect to the epoxide concentration and second order with respect to acetic acid. The reaction velocity constant at 70°C was found to be 2 × 10 −3 1 −3 hr −1 mol −2 , the frequency factor, A, = 2.321 × 10 7 hr −1 and the energy of activation, E a = 15.84 k cal mol −1 . The effects of the concentration of acetic acid and the temperature on the net yield of epoxides by in situ epoxidation were also studied on the basis of the predicted kinetic parameters of the reaction system.