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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
Magazine articles
Laboratory method for determining the source of brightness loss at a southern United States bleached paperboard mill, TAPPI Journal October 2018
Laboratory method for determining the source of brightness loss at a southern United States bleached paperboard mill, TAPPI Journal October 2018
Journal articles
Factors contributing to improved environmental performance in the Finnish kraft pulping industry, TAPPI JOURNAL, September 2007
Factors contributing to improved environmental performance in the Finnish kraft pulping industry, TAPPI JOURNAL, September 2007
Journal articles
HEADBOX ...latest industry news, Paper360° September 2007 07SEPPA06
HEADBOX: …Latest industry news, Paper360º September 2007
Journal articles
Smartmill, PREvIEw, EPE Conference will spotlight bio-energy, sustainability, cost reduction breakthroughs, Paper360° September 2007 07SEPPA15
EPE Conference will spotlight bio-energy, sustainability, cost reduction break throughs, Paper360º September 2007
Journal articles
Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt DOEOPD1 Kraft Pulps
Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt D0EOPD1 kraft pulps, TAPPI JOURNAL, August 2008
Journal articles
Components Removal in Flotation Deinking, Progress in Paper Recycling, Vol. 17, No. 4, August 2008
Components Removal in Flotation Deinking, Progress in Paper Recycling, Vol. 17, No. 4, August 2008
Journal articles
Conference Review - PAPTAC 94th Annual Meeting, Progress in Paper Recycling, Vol. 17, No. 4, August 2008
Conference Review - PAPTAC 94th Annual Meeting, Progress in Paper Recycling, Vol. 17, No. 4, August 2008