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Chitosan supported palladium catalyst. VI. Nitroaniline degradation
Author(s) -
Vincent Thierry,
Peirano Francisco,
Guibal Eric
Publication year - 2004
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.21051
Subject(s) - catalysis , palladium , chitosan , sodium formate , formate , chemistry , degradation (telecommunications) , glutaraldehyde , polymer chemistry , nuclear chemistry , inorganic chemistry , materials science , chemical engineering , organic chemistry , telecommunications , computer science , engineering
A chitosan‐supported palladium catalyst was prepared by immobilization of palladium on glutaraldehyde crosslinked chitosan followed by in situ chemical reduction. This catalyst was successfully used for the degradation of 4‐nitroaniline (4‐NA) in the presence of sodium formate, used as the hydrogen donor. The reaction product was 1,4‐phenylenediamine. The degradation was favored by acidic pH. A 10 to 15 excess of formate (compared to 4‐NA) is required to achieve complete degradation of the substrate. The reaction appears to be limited to the external layers of the catalyst: small particle size is required to optimize the degradation kinetics. Alternatively, an increase of catalyst dosage is required to increase kinetic rates but at the expense of palladium consumption. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1634–1642, 2004