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Oxidation and oligomerization of ethyl linoleate under the influence of the combination of ascorbic acid 6-palmitate/iron-2-ethylhexanoate

Paper ID Volume ID Publish Year Pages File Format Full-Text
44283 46013 2006 8 PDF Available
Title
Oxidation and oligomerization of ethyl linoleate under the influence of the combination of ascorbic acid 6-palmitate/iron-2-ethylhexanoate
Abstract

In this paper we report the oxidation and oligomerization of ethyl linoleate (EL), a model compound for alkyd resins, under the influence of iron-2-ethylhexanoate (Fe-eh) in combination with ascorbic acid 6-palmitate (AsA6p) at different AsA6p/Fe-eh molar ratios (0/1–4/1). Reactions were studied in time by FT-IR, NMR, size exclusion chromatography (SEC) and peroxide amount determination. The oxidation and oligomerization of EL were accelerated by the combination of AsA6p and Fe-eh, and the catalytic properties of the catalysts were strongly dependent on the molar ratio AsA6p/Fe-eh. The molar ratio of 2/1 appeared to be optimal, at which both the oxidation and oligomerization of EL were the fastest. At molar ratio smaller than 2/1, or only in the presence of Fe-eh, the EL oxidation showed a time lag of up to 100 h; above the ratio 2/1 the rates of both EL oxidation and oligomerization decreased. Results are explained in terms of the multi-facet role played by AsA6p: its pro-oxidant or anti-oxidant properties, depending on the ratio of AsA6p/Fe-eh, and its effect on the Fe-eh complex.

Keywords
Ethyl linoleate; Iron; Ascorbic acid 6-palmitate; Oxidation
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Oxidation and oligomerization of ethyl linoleate under the influence of the combination of ascorbic acid 6-palmitate/iron-2-ethylhexanoate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 297, Issue 2, 6 January 2006, Pages 174–181
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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