H2O2 oxidation of lignin model dimers catalyzed by copper(II)– phenanthroline

Halma, Matilte; Lachenal, Dominique; Marlin, Nathalie; Deronzier, Alain; Brochier, Marie Christine; Zarubin, M. Ya.

doi:10.1016/j.indcrop.2015.05.026

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…However, cleavage of the C-O bonds in these model compounds usually requires more harsh conditions such as use of oxygen (O2) 42 or hydrogen peroxide (H2O2). [43][44] Two more complicated dimeric model compounds 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)propane-1,2-diol (DMPD) and guaiacylgly-cerol-guaiacyl ether (GGE) were also studied (Table S5). For the DMPD substrate, conversion cannot be detected at 150°C using air as oxidant under otherwise same conditions used for MPP-ol (Table S5, entry 1 vs Table 1, entry 17).…”

Section: Catalytic Oxidation Of Other Lignin Model Compoundsmentioning

confidence: 99%

Oxidative cleavage of β-O-4 bonds in lignin model compounds with a single-atom Co catalyst

et al. 2019

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Section: Catalytic Oxidation Of Other Lignin Model Compoundsmentioning

confidence: 99%

Oxidative cleavage of β-O-4 bonds in lignin model compounds with a single-atom Co catalyst

et al. 2019

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“…It has been effectively shown that HOO − is effective in lignin depolymerisation through a study on lignin model compounds. The proposed mechanism involves, at first, the oxidation of the alcohol group in the C-α position into a carbonyl group; the second step is the cleavage of the β- O -4 linkage by a series of nucleophilic attacks initiated by the reaction of the perhydroxyl anion on the carbonyl group [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Controlling the Molecular Weight of Lignosulfonates by an Alkaline Oxidative Treatment at Moderate Temperatures and Atmospheric Pressure: A Size-Exclusion and Reverse-Phase Chromatography Study

Guizani

Lachenal

2017

IJMS

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The molecular weights of lignosulfonates (LSs) are modified by a rather simple process involving an alkaline oxidative treatment at moderate temperatures (70–90 °C) and atmospheric pressure. Starting from LSs with an average molecular weight of 90,000 Da, and using such a treatment, one can prepare controlled molecular weight LSs in the range of 30,000 to 3500 Da based on the average mass molecular weight. The LS depolymerisation was monitored via reverse-phase and size-exclusion chromatography. It has been shown that the combination of O2, H2O2 and Cu as a catalyst in alkaline conditions at 80 °C induces a high LS depolymerisation. The depolymerisation was systemically accompanied by a vanillin production, the yields of which reached 1.4 wt % (weight percentage on LS raw basis) in such conditions. Also, the average molecular weight and vanillin concentration were correlated and depended linearly on the temperature and reaction duration.

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“…Some studies have investigated the use of H 2 O 2 with additives for purposes other than bleaching [14][15][16][17]. Walger et al (2017) studied the hydrogen peroxide-copper phenanthroline system in neutral and alkaline pH to strip the colors of recycled fibers.…”

Section: Conditions Classical P Stage (Po) or (Op) Stagementioning

confidence: 99%

“…The decomposing products lead to the introduction of hydrophilic carboxyl groups in the pulp, the cleavage of different types of bonds, and the dissolution of lignin. Some studies have investigated the use of H₂O₂ with additives for purposes other than bleaching [14][15][16][17]. Walger et al (2017) studied the hydrogen peroxide-copper phenanthroline system in neutral and alkaline pH to strip the colors of recycled fibers.…”

Section: Conditions Classical P Stage (Po) or (Op) Stagementioning

confidence: 99%

Oxidation Treatments Using Hydrogen Peroxide to Convert Paper-Grade Eucalyptus Kraft Pulp into Dissolving-Grade Pulp

Vera-Loor,

Rigou,

Mortha

et al. 2023

Molecules

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Converting paper-grade bleached Kraft pulp into dissolving pulp using eco-friendly chemicals on-site at the mill is a challenge for the pulp industry. In this study, two oxidation systems are evaluated: the first one is based on the use of hydrogen peroxide at various levels of alkalinity; the second one investigates the use of sodium periodate followed by hydrogen peroxide to convert aldehydes into carboxyls and enhance their hemicelluloses removal. Our results have shown that when using only peroxide, the removal of hemicelluloses was not sufficient to improve the pulp’s dissolving ability. Conversely, the periodate–peroxide system proved to be more efficient. Results regarding the pulp purity, solubility, degradation (pulp viscosity and cellulose molecular mass distribution), brightness, and its potential applications were discussed.

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H2O2 oxidation of lignin model dimers catalyzed by copper(II)– phenanthroline

Cited by 12 publications

References 17 publications

Oxidative cleavage of β-O-4 bonds in lignin model compounds with a single-atom Co catalyst

Oxidative cleavage of β-O-4 bonds in lignin model compounds with a single-atom Co catalyst

Controlling the Molecular Weight of Lignosulfonates by an Alkaline Oxidative Treatment at Moderate Temperatures and Atmospheric Pressure: A Size-Exclusion and Reverse-Phase Chromatography Study

Oxidation Treatments Using Hydrogen Peroxide to Convert Paper-Grade Eucalyptus Kraft Pulp into Dissolving-Grade Pulp

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