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Autoxidation of fatty acid esters in the presence of a heavy metal catalyst “Salcomine” (Co[II]‐bissalicylalethylenedi‐imine): I. Effect of catalyst upon rate of consumption of oxygen and decomposition of hydroperoxide
Author(s) -
Jarvi Pentti K.
Publication year - 1972
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533241
Subject(s) - autoxidation , chemistry , catalysis , decomposition , oxygen , induction period , metal , fatty acid , imine , arrhenius equation , organic chemistry , inorganic chemistry , activation energy
The autoxidation of fatty acid esters in the presence of a heavy metal chelate, “Salcomine” (Co[II]‐bissalicylalethylenedi‐imine), has been studied. Both antioxidative and prooxidative effects have been observed. When the concentration of the catalyst is decreased or the temperature is increased, the induction period becomes shorter and under some conditions disappears. It was shown that the decomposition of hydroperoxides is affected by salcomine; a first order reaction is involved with Arrhenius parameters E=21,000 cal, and A=8.99×10 10 sec −1 . The solubility of oxygen in fatty acid esters above 30 C, with and without salcomine, is the same. Theoretical aspects of the reaction mechanism, that are consistent with the experimental results, are proposed.