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Journal articles
Open Access
Hydrogen peroxide and caustic soda: Dancing with a dragon while bleaching,TAPPI Journal December 2024

Peter W. Hart, Carl Houtman, and Kilby Hirth | TAPPI J. 12(7): 59(2013) - ABSTRACT: When hydrogen peroxide is mixed with caustic soda, an auto-accelerating reaction can lead to generation of significant amounts of heat and oxygen. On the basis of experiments using typical pulp mill process concentration and temperatures, a relatively simple kinetic model has been developed. Evaluation of these model results reveals that hydrogen peroxide-caustic soda systems are extremely sensitive to hydrogen peroxide:caustic soda ratio, transition metal contamination, and temperature. Small changes in initial conditions can result in a closed system becoming explosive. Analysis of model results was used to develop guidelines for safer application of hydrogen peroxide in a mill setting.

Journal articles
Open Access
Production of high yield bleached hardwood kraft pulp: Breaking the kraft pulp yield barrier,TAPPI Journal December 2024

Author: Peter W. Hart | TAPPI J. 10(9): 37(2011) - ABSTRACT: A modified kraft pulping process has been developed that successfully breaks the traditional hard-wood kraft pulp yield barrier. The process produces fully bleached, high brightness hardwood kraft pulp with a yield of greater than 53% on wood. Details of the development and processing steps, along with various recovery cycle impacts, are discussed.

Journal articles
Open Access
Medium Consistency Oxygen Delignification Performed with a Controlled Cavitation Reactor, TAPPI JOURNAL, February 2006, Vol. 5(2) (376 KB)

Medium Consistency Oxygen Delignification Performed with a Controlled Cavitation Reactor, TAPPI JOURNAL, February 2006, Vol. 5(2) (376 KB)

Journal articles
Open Access
A Low-Temperature, Black Liquor Gasifier Model for Use in WinGEMS, TAPPI JOURNAL, February 2006, Vol. 5(2) (242 KB)

A Low-Temperature, Black Liquor Gasifier Model for Use in WinGEMS, TAPPI JOURNAL, February 2006, Vol. 5(2) (242 KB)

Journal articles
Open Access
Polarized light reflectometry for studies of paper coating s

Polarized light reflectometry for studies of paper coating structure - Part I. Method and instrumentation, TAPPI JOURNAL, July 2006, Vol. 5(7)

Journal articles
Open Access
Mineral Scale Management - Part II. Fundamental Chemistry, T

Mineral Scale Management - Part II. Fundamental Chemistry, TAPPI JOURNAL, July 2006, Vol. 5(7)

Journal articles
Open Access
Mineral Scale Management, Part I. Case Studies, TAPPI JOURNA

Mineral Scale Management, Part I. Case Studies, TAPPI JOURNAL, June 2006, Vol. 5(6) (192 KB)

Journal articles
Open Access
Operational Evaluation of Rotary Drum Vacuum Filters for Brownstock Washing Using Basic Filtration Parameters, TAPPI JOURNAL, March 2006, Vol. 5(3) (267KB)

Operational Evaluation of Rotary Drum Vacuum Filters for Brownstock Washing Using Basic Filtration Parameters, TAPPI JOURNAL, March 2006, Vol. 5(3) (267KB)

Journal articles
Open Access
Toner Particle Comminution in Office Paper Dispersion , TAPP

Toner Particle Comminution in Office Paper Dispersion , TAPPI JOURNAL, May 2006, Vol. 5(5) (833 KB)

Journal articles
Open Access
Purification of Peroxide-Bleached TMP Waterby Dissolved Air

Purification of Peroxide-Bleached TMP Waterby Dissolved Air Flotation, TAPPI JOURNAL, May 2006, Vol. 5(5) (395 KB)

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