Oxidation of Fully Bleached Paper-grade Kraft Pulps with H2O2 Activated by Cu(Phen) and the Effect of the Final pH

被引：0
|
作者：
Vera-Loor, Andrea [1 ]
Walger, Elsa [1 ]
Mortha, Gerard [1 ]
Marlin, Nathalie [1 ]
机构：
[1] Univ Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
来源：
BIORESOURCES | 2023年 / 18卷 / 03期
关键词：
Cellulose oxidation; Hydrogen peroxide; Copper phenanthroline; Fully bleached paper grade pulp; Cotton linters; Dissolving ability; Cellulose depolymerization;
D O I：
10.15376/biores.18.3.5222-5241
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Hydrogen peroxide is an environmentally friendly bleaching chemical that is widely used in alkaline media in the pulp and paper industry. In this study, unconventional reaction conditions of the conventional bleaching P-stage were performed to evaluate its effect on cellulose. The objective was to "tailor" the cellulose degradation according to different applications, such as dissolving pulps. Different operating conditions were studied: pH variation (alkaline or acidic medium), as well as the addition of Cu(II) or the Cu(II)-phenanthroline complex. The hypotheses considered were (1) Using H2O2 in unconventional conditions will favor hemicelluloses removal after depolymerization and will lead to the desired cellulose degradation, and (2) H2O2 oxidation carried out under unconventional conditions will favor the dissolving ability of cellulose.
引用
收藏
页码：5222 / 5241
页数：20
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