Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Journal articles
Magazine articles
Understanding the risks and rewards of using 50% vs. 10% strength peroxide in pulp bleach plants, TAPPI Journal November 2018
Authors: Alan W. Rudie and Peter W. Hart | ABSTRACT: The use of 50% concentration and 10% concentration hydrogen peroxide were evaluated for chemical and mechanical pulp bleach plants at storage and at point of use. Several dangerous occurrences have been documented when the supply of 50% peroxide going into the pulping process was not stopped during a process failure. Startup conditions and leaking block valves during maintenance outages have also contributed to explosions. Although hazardous events have occurred, 50% peroxide can be stored safely with proper precautions and engineering controls. For point of use in a chemical bleach plant, it is recommended to dilute the peroxide to 10% prior to application, because risk does not outweigh the benefit. For point of use in a mechanical bleach plant, it is recommended to use 50% peroxide going into a bleach liquor mixing system that includes the other chemicals used to maintain the brightening reaction rate. When 50% peroxide is used, it is critical that proper engineering controls are used to mitigate any risks.
Journal articles
Magazine articles
Using multistage models to evaluate how pulp washing after the first extraction stage impacts elemental chlorine-free bleach demand, TAPPI Journal November 2018
Using multistage models to evaluate how pulp washing after the first extraction stage impacts elemental chlorine-free bleach demand, TAPPI Journal November 2018
Journal articles
Magazine articles
Are North American Kraft Pulp Mills at Risk?, Paper360º November/December 2018
Are North American Kraft Pulp Mills at Risk?, Paper360º November/December 2018
Journal articles
Neutral to Alkaline Rosin Sizing Using Polyethyleneimine-Epichlorohydrin (PEI-epi) as a Mordant, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 2 FEBRUARY 2002 [02FEBJP39.pdf]
Neutral to alkaline rosin sizing using polyethyleneimine-epichlorohydrin (pei-epi) as a mordant, Journal of Pulp and Paper Science, February 2002, Vol. 28(2) (173KB)
Journal articles
Catalyzed interstage sulfonation CTMP process of aspen wood, Solutions!, February 2002, Vol. 85(2) (189KB)
Catalyzed interstage sulfonation CTMP process of aspen wood, Solutions!, February 2002, Vol. 85(2) (189KB)
Journal articles
Effect of stripper off-gas burning on NOx emissions, Solutions!, January 2002, Vol. 85(1) (94KB)
Effect of stripper off-gas burning on NOx emissions, Solutions!, January 2002, Vol. 85(1) (94KB)
Journal articles
Vibration analysis applied to low-speed machines in the pulp and paper industry, Solutions!, January 2002, Vol. 85(1) (516KB)
Vibration analysis applied to low-speed machines in the pulp and paper industry, Solutions!, January 2002, Vol. 85(1) (516KB)
Journal articles
Practical Solutions: Better capital allocation decisions, July 2002 SOLUTIONS! [02JULSO50.pdf]
Better capital allocation decisions, Solutions!, July 2002, Vol. 85(7) (236KB)
Journal articles
Nutrient limited biofilm pretreatment - an efficient way to upgrade activated sludge plants, TAPPI JOURNAL, June 2002 (131KB)
Nutrient limited biofilm pretreatment - an efficient way to upgrade activated sludge plants, Solutions! & TAPPI JOURNAL, June 2002 (131KB)
Journal articles
ASIAN OUTLOOK: EUROPEANS EUROPEANS LOOK EAST for the long term, June 2002 SOLUTIONS! [02JUNSO59.pdf]
Europeans look east for the long term, Solutions!, June 2002, Vol. 85(6) (159KB)