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Acid-catalyzed oxidation of carboxymethyl cellulose polysaccharide by chromic acid in aqueous perchlorate solutions. A kinetics study

Paper ID Volume ID Publish Year Pages File Format Full-Text
51008 46825 2010 5 PDF Available
Title
Acid-catalyzed oxidation of carboxymethyl cellulose polysaccharide by chromic acid in aqueous perchlorate solutions. A kinetics study
Abstract

The acid-catalysis of chromic acid oxidation of carboxymethyl cellulose (CMC) as a polysaccharide in aqueous perchlorate solutions at a constant ionic strength of 2.0 mol dm−3 have been investigated spectrophotometrically. The experimental results showed first-order kinetics in chromic acid and fractional first-order dependence with respect to [CMC]. A kinetic evidence for the formation of 1:1 complex between chromic acid and CMC was revealed. The hydrogen ion dependence of the reaction rates showed that the oxidation process is acid-catalyzed. Induced polymerization of acrylonitrile indicated that the oxidation process proceeds by free-radical mechanism. The kinetic parameters have been evaluated and a tentative reaction mechanism consistent with the kinetic results is suggested.

Keywords
Catalysis; Carboxymethyl cellulose; Polysaccharides; Chromic acid; Oxidation; Kinetics
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Acid-catalyzed oxidation of carboxymethyl cellulose polysaccharide by chromic acid in aqueous perchlorate solutions. A kinetics study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 7, 10 March 2010, Pages 611–615
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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