Alkali-induced decomposition of hydrogen peroxide

Galbács, Zoltán; Csányi, László J.

doi:10.1039/dt9830002353

Cited by 81 publications

(70 citation statements)

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“…In the presence of transition metal ions which can catalyse peroxide decomposition we might expect the steady state concentrations of free radical species would be increased, and this has indeed been observed (42). Furthermore, it has been found that the position of the maximum rate occurs at a pH which depends on the metal present under both homogeneous (1 1) and heterogeneous (46,47) conditions.…”

Section: Hobbs and Abbotmentioning

confidence: 85%

Peroxide Bleaching Reactions Under Alkaline and Acidic Conditions

Hobbs

Abbot

1991

Journal of Wood Chemistry and Technology

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An examination of previously reported kinetic expressions describing peroxide bleaching of wood pulp under alkaline conditions reveals that the overall process can be considered as a combination of two parallel reaction routes. The first route corresponds to a reaction involving direct participation of the perhydroxyl anion in chromophore elimination. This mechanism can be identified with the classical explanation for peroxide bleaching. The second route can be associated with reactions in which chromophores are eliminated through the action of free radical intermediate species. New experimental evidence is presented to show that processes catalysed by transition metal ions can lead to enhancement of bleaching.A two stage peroxide bleaching sequence, initially under acidic conditions in the presence of chromium, followed by alkaline conditions produces an acceleration in bleaching rate, without significant additional consumption of peroxide.

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Section: Hobbs and Abbotmentioning

confidence: 85%

Peroxide Bleaching Reactions Under Alkaline and Acidic Conditions

Hobbs

Abbot

1991

Journal of Wood Chemistry and Technology

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“…In alkaline solutions, hydrogen peroxide decomposition has been described as a base catalyzed reaction [16,17] involving its reaction with perhydroxyl ion (HO À 2 ) as shown in the following equation:…”

Section: Introductionmentioning

confidence: 99%

A study of hydrogen peroxide decomposition in ammonia-peroxide mixtures (APM)

Siddiqui

Keswani

Brooks

et al. 2013

Microelectronic Engineering

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“…The decomposition reaction was found to be of first order [4]. The secondorder reaction was shown by the addition of complexing agents which reduce the activity of the metal ion contamination [6,7].…”

Section: Introductionmentioning

confidence: 95%

Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal‐heterocyclic complexes

El‐Safty

Elsheikh

Salem

et al. 2001

Int J of Chemical Kinetics

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The heterocyclic compounds piperidine (Pip), piperazine (Pz), morpholine (Morph), and N-methyl piperazine (N-MPz) were used as ligands to form transition metal complexes with Ni(II), Cu(II), and Co(II) ions. These complexes were supported on Dowex-50W resin so as to form new potential active catalysts for H 2 O 2 decomposition in an aqueous medium. In all cases the reaction showed a first-order kinetics with respect to H 2 O 2 concentration, except with Co(II) complexes, the reaction showed a second-order kinetics with 2% divinyl benzene (DVB) (50-100 mesh and 200-400 mesh). The rate constant k (per gram dry resin) was evaluated with a resin of cross-linkage 2 and 8% DVB (50-100 mesh) and 2% DVB (200-400 mesh) over temperature range 25-40 • C. With a given resin cross-linkage, the rate constant has the following order: Ni(II) complexes < Co(II) complexes < Cu(II) complexes. With Pz ligand, k increased in the following sequence: Ni(II) complexes < Cu(II) complexes < Co(II) complexes. The reaction mechanisms of the fi rst-and second-order kinetics were discussed and the activation parameters were deduced.

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Alkali-induced decomposition of hydrogen peroxide

Cited by 81 publications

References 0 publications

Peroxide Bleaching Reactions Under Alkaline and Acidic Conditions

Peroxide Bleaching Reactions Under Alkaline and Acidic Conditions

A study of hydrogen peroxide decomposition in ammonia-peroxide mixtures (APM)

Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal‐heterocyclic complexes

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