Oxygen Delignification of Acid Sulfite and Bisulfite Softwood Pulps
BioResources, 2015 This study discusses alternatives for the production of sulfite pulps cooked to high kappa numbers, and a subsequent oxygen treatment by using the same cation in the cooking and in the oxygen stages. Magnesium was used as a cation during both the cooking
Niklas Kvarnlöf, Ulf Germgård
doaj +4 more sources
On the nature of the selectivity of oxygen delignification
Nordic Pulp and Paper Research JournalAbstract This work has focused on oxygen’s role in the delignification process within the context of pulp production. We have investigated the role of oxygen in a complex set of chemical reactions taking place during this process, including both oxidative and non-oxidative reactions.
Mikael E Lindstrom +2 more
exaly +4 more sources
FORMATION OF VANILLIN AND SYRINGALDEHYDE IN AN OXYGEN DELIGNIFICATION PROCESS
BioResources, 2010 The formation of vanillin and syringaldehyde during an oxygen delignification process was evaluated. The cleavage of conjugated Cα-Cβ bonds in phenolic lignin caused by the attack of oxygen leads to the formation of aromatic aldehydes and ketones.
Zhaojiang Wong, Kefu Chen, Jun Li
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The Dual Effect of Ionic Liquid Pretreatment on the Eucalyptus Kraft Pulp during Oxygen Delignification Process [PDF]
Polymers, 2021 Oxygen delignification presents high efficiency but causes damage to cellulose, therefore leading to an undesired loss in pulp strength. The effect of ionic liquid pretreatment of [BMIM][HSO4] and [TEA][HSO4] on oxygen delignification of the eucalyptus ...
Letian Qi, Guihua Yang, Jiachuan Chen
exaly +3 more sources
Evaluating the Potential to Modify Pulp and Paper Properties through Oxygen Delignification [PDF]
ACS Omega, 2020 The potential to modify pulp and paper properties by oxygen delignification was assessed by looking beyond the ordinary purpose of oxygen delignification.
Cláudia S. V. G. Esteves +3 more
doaj +3 more sources
High Selectivity Oxygen Delignification [PDF]
, 2005 Project Objective: The objectives of this project are as follows: (1) Examine the physical and chemical characteristics of a partner mill pre- and post-oxygen delignified pulp and compare them to lab generated oxygen delignified pulps; (2) Apply the chemical selectivity enhancement system to the partner pre-oxygen delignified pulps under mill ...
Arthur Ragauskas +2 more
core +6 more sources
The Influence of Alkalinity in Oxygen Delignification of Soda/AQ Pulp From Old Corrugated Container [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2011 The influence of oxygen delignification as an environmental friendly process, was investigated on Soda/AQ pulp from Old Corrugated Container (OCC) fibers.
Mohammad ali Azad far +2 more
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Dimensionless Parameter Approach For Oxygen Delignification Kinetics
Industrial & Engineering Chemistry Research, 2008 In this study, the kinetic analysis of oxygen delignification of Turkish southern hardwood Kraft pulp was carried out. The kinetic rate data were collected in a high pressure batch reactor at industrially significant conditions of temperature, alkali charge, and oxygen partial pressure.
Dogan, Ismail, Gueruez, Gueniz
openaire +3 more sources
Boosting Oxygen Delignification of Poplar Kraft Pulp by Xylanase Pretreatment
BioResources, 2015 Enhancement of oxygen delignification is critical to improve subsequent bleaching efficiency while being environmentally compatible. In the present study, xylanase was used to improve the delignification process of poplar kraft pulp.
Xingxiang Ji +5 more
doaj +2 more sources
Influence of xylan content on the oxygen delignification performance of eucalypt kraft pulps as studied using prehydrolysis and xylanase treatments [PDF]
BioResources, 2012 Common metrics for evaluating the efficiency of oxygen delignification include the kappa number and Klason lignin content. As a change in xylan content often leads to a change in HexA content, the kappa number must be corrected for the HexA contribution ...
Helena Wedin +3 more
doaj +2 more sources