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Influence of H2O2 on a chloride-dependent reaction path to chlorine dioxide

✍ Scribed by Brian Crump; William R. Ernst; H. M. Neumann

Publisher: American Institute of Chemical Engineers
Year: 1998
Tongue: English
Weight: 633 KB
Volume: 44
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690441116

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✦ Synopsis

Reaction paths governing chlorine dioxide formation from solutions of sodium chlorate, sulfiric acid, hydrogen peroxide and sodium chloride at 25°C were examined. Chlorine dioxide was formed by two paths: the reduction of chlorate by hydrogen peroxide and the reduction of chlorate by chloride. A t conditions of this study, the rate of the chloride-chlorate path predominated and was enhanced by hydrogen peroxide, reaching an upper limit as hydrogen peroxide concentration was increased. A mechanism was proposed that explains the obserued behavior. It is based on existing theory, but includes a new step: the rapid reaction of hydrogen peroxide with an intermediate, CI, 0,. It was shown also that chloride was not required to sustain chlorine dioxide formation in the hydrogen peroxide-chlorate path.

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