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Over the Wire, Paper360º March/April 2021
Over the Wire, Paper360º March/April 2021
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Planning ´Sharpens the Axe’, Paper360º March/April 2021
Planning ´Sharpens the Axe’, Paper360º March/April 2021
Journal articles
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What is Our Industry’s Most Critical Workforce Need?, Paper360º March/April 2021
What is Our Industry’s Most Critical Workforce Need?, Paper360º March/April 2021
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Build from Strength, Paper360º March/April 2021
Build from Strength, Paper360º March/April 2021
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How Surface Design of Suction and Press Rolls Affects Dewatering, Paper360º March/April 2021
How Surface Design of Suction and Press Rolls Affects Dewatering, Paper360º March/April 2021
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TAPPI Journal Summaries, Paper360º March/April 2021
TAPPI Journal Summaries, Paper360º March/April 2021
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As Companies Abandon WFH Trend, Will Printing and Writing Bounce Back?, Paper360º March/April 2021
As Companies Abandon WFH Trend, Will Printing and Writing Bounce Back?, Paper360º March/April 2021
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TAPPI News, Paper360º March/April 2021
TAPPI News, Paper360º March/April 2021
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ASPI News, Paper360º March/April 2021
ASPI News, Paper360º March/April 2021
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Magazine articles
Peracetate/singlet oxygen chemistry used in post-bleaching of kraft pulp as a practical oxidant for paper machines, TAPPI Journal May 2021
ABSTRACT: The use of a novel sodium peracetate/singlet oxygen chemistry for brightening bleached kraft pulp shows exciting potential for technical performance, supply logistics, safety, and cost reduction. Potential chemical carryover to the paper machine raises questions about whether peracetate will impact paper machine performance, such as metal corrosion, useful press felt life, and interference with existing biocide programs or paper machine chemistry. Sodium peracetate/singlet oxygen chemistry can be used in high-density storage chests for brightening/whitening and to increase color stability. Any oxidant used directly before the paper machine has the possibility of impacting paper machine operations. Traditional oxidants used in bleaching, such as chlorine dioxide and hydrogen peroxide, are known to cause corrosion on machinery metals and press felts. Hydrogen peroxide residuals can interfere with common biocide programs. Traditional oxidants used in biocide treatments themselves significantly degrade press felt life when the rule-of-thumb concentration thresholds are exceeded. Sodium peracetate is evaluated in this paper for its impact on nylon press felt fiber degradation, metal corrosion, and interference with typical biocide programs.Laboratory results indicate that sodium peracetate/singlet oxygen chemistry is less corrosive than chlorine, bromine, and hydrogen peroxide on press felt nylon fiber and can therefore be used at higher levels than those chemistries to increase brightness without increasing negative downstream impact. Sodium peracetate can also be used with current biocide programs without negative impacts such as consumptive degradation. Higher residuals of peracetate going to the paper machine may be useful as a biocide itself and can complement existing programs, allowing those programs to stay within their safe operating levels and thereby extend press felt useful life.