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Kinetic study on peroxidation of benzaldehyde by polymer‐immobilized cobalt‐EDTA complex
Author(s) -
Wang ChengChien,
Li WenSam,
Cheng ShihKai,
Chen ChuhYean,
Chen ChuhYung,
Kuo JenFeng
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.2183
Subject(s) - benzaldehyde , chemistry , cobalt , methacrylic acid , selectivity , nuclear chemistry , acrylonitrile , polymer chemistry , yield (engineering) , ethylenediamine , catalysis , polymer , copolymer , inorganic chemistry , organic chemistry , materials science , metallurgy
Polymer‐immobilized cobalt‐EDTA complex was prepared by grafted copolymerization of methacrylic acid (MAA) and acrylonitrile (AN initiated by redox initiation of EDTA‐2Na (Ethylenediamine tetraacetic acid disodium salt) with ceric ion (Ce 2+ )). High yield and selectivity for peroxidation of benzaldehyde were obtained when using the polymer‐immobilized cobalt‐EDTA complex as a catalyst. With the concentration of benzaldehyde increasing, the concentration of perbenzoic acid was increased from 0.38 M to 0.98 M, but yield of perbenzoic acid decreased from 0.76 M to 0.65 M. With the amount of the polymer support increased, the yield of perbenzoic acid increased from 70% to 82%. The selectivity remained about 82% in the various amounts of the polymer support. The activation energy of peroxidation of benzaldehyde was 43.4 KJ/mole. The expression of the reaction rate was: r i = k[ RCHO ] 1.0 o [polymer support ] 0.5 . A mechanism for peroxidation of benzaldhyde catalysed by polymer‐immobilized cobalt‐EDTA complex was proposed in this investigation. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 3248–3257, 2001