Medium Consistency Ozone Bleaching Plants

2017 ◽  
Vol 71 (2) ◽  
pp. 164-171 ◽  
Author(s):  
Takanori Miyanishi
Keyword(s):  
Ozone Bleaching

Achievements in Industrial Ozone Bleaching

2011 ◽  
Vol 65 (8) ◽  
pp. 780-787 ◽  
Author(s):  
Emil Germer ◽  
Alexis Métais ◽  
Jean-Christophe Hostachy
Keyword(s):  
Ozone Bleaching

Improving cellulose viscosity protection and delignification in ozone bleaching of low-consistency pulp with water-soluble chitosan

2021 ◽  
Vol 171 ◽  
pp. 113862
Author(s):  
Tian He ◽  
Lixue Hang ◽  
Mingyou Liu ◽  
Haiyu Liu ◽  
Lu Wang ◽  
...  
Keyword(s):  
Water Soluble ◽  
Ozone Bleaching

scholarly journals Ozone bleaching of cellulose

2017 ◽  
Vol 254 (8) ◽  
pp. 082009 ◽  
Author(s):  
H A Eren ◽  
S Eren
Keyword(s):  
Ozone Bleaching

The Role of Oxalic Acid in the Ozone Bleaching Kinetics of an Xo-Kraft Pulp

2000 ◽  
Vol 20 (2) ◽  
pp. 147-167 ◽  
Author(s):  
M. Blanca Roncero ◽  
José F. Colom ◽  
Teresa Vidal ◽  
M. [Agrave]ngels Queral
Keyword(s):  
Oxalic Acid ◽  
Kraft Pulp ◽  
Kinetics Of ◽  
Ozone Bleaching

Initiating ECF bleaching sequences of eucalyptus kraft pulps with Z/D and Z/E stages

Holzforschung ◽  
2010 ◽  
Vol 64 (1) ◽  
Author(s):  
Juan C. García ◽  
Francisco López ◽  
Antonio Pérez ◽  
M. Angels Pèlach ◽  
Pere Mutjé ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Chlorine Dioxide ◽  
Ecological Impact ◽  
Substantial Reduction ◽  
Reference Sequence ◽  
Kraft Pulps ◽  
Eucalyptus Kraft Pulp ◽  
The Impact ◽  
Ecf Bleaching ◽  
Ozone Bleaching

Abstract Ozone bleaching is a common practice in pulping, and also of eucalyptus, where it is usually applied in combination with bleaching sequences based on oxygen, hydrogen peroxide, or chlorine dioxide. Ozone has been proven to be a highly efficient and competitive bleaching chemical in terms of delignification efficiency, low costs, and reducing ecological impact. The objective of the present work was to evaluate technology with ozone/alkaline extraction (Z/E) and ozone/chlorine dioxide (Z/D) for bleaching of eucalyptus kraft pulp. Primarily, the impact of these bleaching steps on refinability and quality of pulp should be investigated. As reference, the sequence D*(EP)D (hot chlorine dioxide, extraction in presence of hydrogen peroxide, chlorine dioxide) was selected, which is considered as the state-of-the-art bleaching in elemental chlorine free (ECF) bleaching technology. Various bleaching sequences with ozone in their first step (Z/D(EP)DP, Z/D(EP)DD, Z/EDP, Z/EDD and A*Z/EDP) were found to provide kraft pulps of similar brightness and in similar yield as the reference sequence D*(EP)D. The kappa number, viscosity, and the contents of glucose and xylose, and hexenuronic acid of the pulps were also similar. In addition, the Z sequences resulted in a substantial reduction of the total chlorine dioxide consumption (more than 30.3% in all cases). The A*Z/EDP sequence, which proved to be the most efficient, yielded 87.5% ClO2 reduction. The studied bleaching sequences also resulted in substantially improved brightness reversal with regard to the reference sequence. The sequence A*Z/EDP was also the most efficient as regards the removal or organochlorines (OX) from the pulp and their reduction in the effluents (AOX). Ozone bleaching sequences improved paper strength, especially with the A*Z/EDP sequence.

Application of an Experimental Design to Modeling of Ozone Bleaching Stage in TCF Processes

2004 ◽  
Vol 26 (5) ◽  
pp. 443-451 ◽  
Author(s):  
A. L. Torres ◽  
M. B. Roncero ◽  
J. F. Colom ◽  
J. A. Martínez ◽  
T. Vidal
Keyword(s):  
Experimental Design ◽  
Ozone Bleaching

Effect of Hydroxyl Radicals on Cellulose and Pulp and their Occurrence During Ozone Bleaching

Holzforschung ◽  
1997 ◽  
Vol 51 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Christine Chirat ◽  
Dominique Lachenal
Keyword(s):  
Hydroxyl Radicals ◽  
Ozone Bleaching
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