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Oxidation of hydroquinone to p ‐benzoquinone catalyzed by Cu(II) supported on chitosan flakes
Author(s) -
Guibal Eric,
Vincent Thierry,
Touraud Evelyne,
Colombo Simon,
Ferguson Andrew
Publication year - 2006
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.23702
Subject(s) - oxidizing agent , hydroquinone , hydrogen peroxide , benzoquinone , catalysis , chemistry , chitosan , substrate (aquarium) , peroxide , copper , inorganic chemistry , polymer chemistry , organic chemistry , geology , oceanography
Copper (sorbed on chitosan flakes) was used as a catalyst for the oxidation of hydroquinone, with dioxygen (from air) and hydrogen peroxide as oxidizing agents. The supported catalyst was very efficient at oxidizing hydroquinone into p ‐benzoquinone. With hydrogen peroxide at pH 5.8, drastic oxidizing conditions led to the formation of subproducts. With a short contact time, together with the use of a low hydrogen peroxide concentration and a small amount of the catalyst, the formation of subproducts could be minimized. The influence of the catalyst/substrate and hydrogen peroxide/substrate ratios was investigated to determine optimum experimental conditions for a high initial oxidation rate and a high production of p ‐benzoquinone. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3034–3043, 2006