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Mechanism and kinetics of the CoCl 2 ‐catalyzed esterification reaction of castor oil with oleic acid
Author(s) -
ErdemŞenatalar A.,
Erencek E.,
Erciyes A. T.
Publication year - 1995
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/bf02542066
Subject(s) - oleic acid , catalysis , chemistry , castor oil , yield (engineering) , kinetics , reaction rate constant , reaction mechanism , chloride , organic chemistry , thermodynamics , biochemistry , physics , quantum mechanics
The apparent orders of the Lewis acid‐catalyzed esterification reactions between castor oil and oleic acid are known to change with the catalyst used and with the reaction temperature. A mechanism is proposed in this study to explain the variations (with temperature) in the apparent orders of the cobalt chloride‐catalyzed esterification reaction between castor oil and oleic acid. According to the proposed mechanism, an acid‐catalyst intermediate forms in an initial, fast quasi‐equilibrium step, and this intermediate then reacts with the oil to yield the products and to regenerate the catalyst in the rate‐determining second step. A general rate expression, with an acid concentration term and a temperature‐dependent constant in the denominator, is derived from the proposed mechanism and is verified with data obtained at different temperatures.