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Study of ClO 2 generation reaction via experimental data of aqueous mixed electrolyte solutions: HClO 4 –NaCLO 3 –H 2 O and HCLO4–NaCl–H 2 O
Author(s) -
Tran F.,
Rouleau D.,
Couillard D.
Publication year - 1990
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280470302
Subject(s) - chemistry , chlorate , aqueous solution , electrolyte , inorganic chemistry , chlorine , chlorine dioxide , ternary operation , chloride , ternary numeral system , electrode , organic chemistry , computer science , programming language , phase (matter)
A new model for mixtures (two and more solutes) of aqueous electrolyte solutions was found to be as accurate as other models, or more accurate, in prediction of new experimental results of the ternary systems HClO 4 –NaClO 3 –H 2 O and HClO 4 –NaCl–H 2 O. The water activity values are then used to study the mechanism of the chloride–chlorate reaction, generating chlorine dioxide: 2H + + ClO − 3 + Cl − → ClO 2 + 1/2Cl 2 + H 2 O Spectrophotometric measurements of the production rate of ClO 2 have confirmed that the intermediary species in the proposed equilibrium H + ( m H 2 O) → H + ( m‐n )H 2 O + n H 2 O Is actually H(H 2 0) + m‐n . The final kinetic expression for the reaction rate of chlorine dioxide generation, used in pulp bleaching, is then derived to explain the high order with respect to acid concentration.