A Survey of Hydrogen Peroxide Bleaching and FAS Bleaching of Liquid Package Recycled Pulp

2014 ◽  
Vol 1081 ◽  
pp. 48-52
Author(s):  
Zong Juan Xu ◽  
Yu Liu ◽  
Zhen Wang
Keyword(s):  
Adverse Effect ◽  
Hydrogen Peroxide ◽  
Process Conditions ◽  
Pulp Fiber ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Bleached Pulp ◽  
Recycled Pulp

This document demonstrates how to affect the brightness of liquid package recycled pulp by hydrogen peroxide bleaching and FAS beaching. The optimum H2O2 bleaching process conditions: 8% H2O2, 4% NaOH, bleaching temperature 80 °C, bleaching time 1.5h. The best FAS bleaching conditions was FAS dosage of 0.5%, NaOH dosage of 0.25%, bleaching temperature at 80 °C, time for 30min. And bleaching had no adverse effect on the performance of bleached pulp fiber.

The Effect of Microwave Treatment on the Hydrogen Peroxide Bleaching of Soda-AQ Wheat Straw Pulp

2011 ◽  
Vol 236-238 ◽  
pp. 1307-1312
Author(s):  
Chao Jun Wu ◽  
Chuan Shan Zhao ◽  
Jun Li ◽  
Ke FU Chen
Keyword(s):  
Hydrogen Peroxide ◽  
Wheat Straw ◽  
Fiber Length ◽  
Weighted Average ◽  
Microwave Treatment ◽  
Arithmetic Average ◽  
Peroxide Bleaching ◽  
Bleached Pulp ◽  
Infra Red ◽  
Wheat Straw Pulp

In this paper, the effect of microwave treatment on the hydrogen peroxide bleaching of Soda-AQ wheat-straw pulp was investigated. The results showed that microwave treatment could increase the brightness of the hydrogen peroxide bleached pulp. The fiber coarseness of microwave enhancing peroxide bleached pulp was higher than that of the peroxide bleached pulp. However, the arithmetic average fiber length, the length weighted average fiber length and weight weighted average fiber length of the former was lower than that of the latter. Fourier transform infra-red spectroscopy (FTIR) and X-ray diffraction (XRD) spectra showed that CrI(%) crystallinity of microwave enhancing peroxide bleached pulp was similar as that of the peroxide bleached pulp but all higher than that of the Soda-AQ wheat-straw pulp. N·O′KI infra-red crystalline index of microwave enhancing peroxide bleached pulp were lower than that of the peroxide bleached pulp. The FTIR spectra of lignin showed that the microwave treatment had some influences on the methoxyl and phenolic group in lignin.

Study on Magnesium Hydroxide-Based Hydrogen Peroxide Bleaching Process of Nigra poplar CTMP

2011 ◽  
Vol 233-235 ◽  
pp. 1328-1331 ◽  
Author(s):  
Qiang Zhao ◽  
De Zhi Sun ◽  
Ming Yang Zhang ◽  
Su Min Kang
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Magnesium Hydroxide ◽  
High Yield ◽  
Pulp Yield ◽  
Pulp Bleaching ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Bleaching Condition ◽  
Pulp Consistency

The Mg(OH)2-based peroxide bleaching process of Nigra poplar CTMP pulp was confirmed. The optimal bleaching condition were as follows: 4% H2O2,1% Mg(OH)2, 15% pulp consistency, the reaction temperature was 80°C and the suitable reaction time was 2 hours. The Mg(OH)2-based bleaching process shows significant benefits over sodium hydroxide process. In contrast, magnesium hydroxide bleaching generates higher pulp yield and lower effluent COD at the same chemical dosage. The study shows peroxide bleaching of CTMP pulp with magnesium hydroxide as alkali source is to be an option for the high-yield pulp bleaching.

scholarly journals Kinetic study on iso-concentration hydrogen peroxide bleaching of poplar chemi-thermomechanical pulp by the process of continuous chemical supplement

BioResources ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. 5408-5415
Author(s):  
Xianqi Sun ◽  
Qingxi Hou ◽  
Haizhen Shi ◽  
Lichun Zhou
Keyword(s):  
Kinetic Model ◽  
Initial Phase ◽  
Reaction Rate ◽  
Reaction Order ◽  
Slow Phase ◽  
Thermomechanical Pulp ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Bleached Pulp ◽  
Continuous Chemical

In the authors’ previous studies, a bleaching process based on continuous chemical supplementation (CCS) was proposed to improve the effectiveness of peroxide bleaching of chemi-thermomechanical pulp (CTMP). In this study, the kinetic model of the CCS process of peroxide bleaching was applied to poplar CTMP to explore how the bleaching rate was affected. The model was based on the rate of chromophore elimination characterized by the brightness gains of bleached pulp. The reaction rate of chromophore destruction proceeded via a rapid initial phase followed by a slow phase. The equation of reaction rate was confirmed. The value of reaction order was -3.62, and the activation energy was 288.8 kJ/mol. The developed kinetic model was a good fit for the experimental results.

Study on TCF Bleaching of Reed Displacement Cooking Pulp

2013 ◽  
Vol 726-731 ◽  
pp. 543-547
Author(s):  
Ting Ting Fan ◽  
Ying Han ◽  
Guang Wei Sun ◽  
Jing Hui Zhou
Keyword(s):  
Hydrogen Peroxide ◽  
Peracetic Acid ◽  
Optimal Conditions ◽  
Experimental Conditions ◽  
Environment Friendly ◽  
Bleaching Process ◽  
Paper Making ◽  
Bleached Pulp ◽  
Method Yield ◽  
Temperature Time

With the improvement of environmental protection requirements, paper-making enterprises are imperative to eliminate pollution directly in production. This paper aims to adopt environment-friendly bleaching method, yield good quality pulp products. Op-Pa-P bleaching process of reed displacement cooking pulp is studied in this paper (O-oxygen, P-hydrogen peroxide, Pa-peracetic acid ). The experimental conditions of Op and Pa stage were optimized respectively. It included oxygen pressure, temperature, time in Op stage and charge of peracetic acid, temperature, time in Pa stage. The results show that the optimal technological conditions of Op are: 0.9Mpa, 100°C, 70min, Op stage can make brightness increase by 57.3%, viscosity decrease by 25% and KMnO4 number reduce to 2.6. Pa stage optimal conditions are Pa charge 1.5%, 70°C, 75min, brightness reached to 79.1 %ISO, KMnO4 number to 1.0, viscosity to 631mL.g-1. The brightness of P bleached pulp reached to 84.8%ISO, viscosity 601 mL.g-1, KMnO4 number 0.8.

Hydrogen Peroxide Bleaching to Wine Corks with a Novel Catalyst

2013 ◽  
Vol 734-737 ◽  
pp. 2282-2286 ◽  
Author(s):  
Li Liu ◽  
Shu Ling Cui
Keyword(s):  
Hydrogen Peroxide ◽  
Cork Stopper ◽  
Capillary Effect ◽  
Sewage Disposal ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Novel Catalyst

A novel catalyst CF-R for hydrogen peroxide bleaching to wine cork stopper was chosen to substitute the traditional imported item, and the corresponding bleaching process was studied. The influence of catalyst CF-R dosage, H2O2 concentration, bleaching temperature and time on cork whiteness and capillary effect were discussed. The optimized bleaching process for wine corks was obtained as follows: H2O2 concentration 14%, catalyst CF-R dosage 80g/L, bleaching temperature 70°Cand bleaching time 60 min. Comparing with the expensive imported catalyst, the amount of catalyst CF-R is greatly decreased, as is significant for not only cutting down the expenditure of chemicals, but also minimizing the burden on bleaching sewage disposal.

New evidence for the role of the borohydride pretreatment on the hydrogen peroxide bleaching of kraft pulp

RSC Advances ◽  
2015 ◽  
Vol 5 (119) ◽  
pp. 98067-98074 ◽  
Author(s):  
Jing Li ◽  
Huichao Hu ◽  
Yanting Song ◽  
Xin-Sheng Chai
Keyword(s):  
Hydrogen Peroxide ◽  
Kraft Pulp ◽  
Carbonyl Groups ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Chemical Pulps ◽  
New Evidence ◽  
Lignin Structure

New evidences for the role of borohydride pretreatment in hydrogen peroxide bleaching process of eucalyptus chemical pulps were provided, i.e., suppressing the catalysis effect of Fe(iii), decreasing carbonyl groups, and constituent lignin structure.

Low Temperature Bleaching of Cotton with a Novel Cationic Activator

2012 ◽  
Vol 608-609 ◽  
pp. 1391-1394
Author(s):  
Yan Li Li ◽  
Zhen Dong Liu ◽  
Xiao Ning Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Low Temperature ◽  
Experimental Method ◽  
Dwell Time ◽  
Bleaching Process ◽  
Fiber Damage ◽  
Peroxide Bleaching ◽  
Bleach Activator ◽  
Fabric Strength ◽  
Activated Peroxide System

A new cationic bleach activator (CBA) N-[4-pyridmoniomethyl)benzoyl]caprolactam bromide (PBCB) was synthesized and evaluated in a hot peroxide bleaching process. The effects of time, temperature and the concentrations of hydrogen peroxide and activator on the bleaching of cotton fabric were investigated using an orthogonal experimental method. The optimal bleaching process of PBCB-activated peroxide system was 5g/L H2O2, 0.5g/L CBA, 40°Cand 45min dwell time under neutral pH, with which a whiteness equivalent to that of the conventional-bleaching system was achieved, but the PBCB system resulted in almost no fiber damage based on fabric strength.

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