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Journal articles
Open Access
Reducing aox by increasing oxidation potential in the first caustic extraction stage, TAPPI Journal December 2024

Authors: Peter W. Hart and Jeffrey S. Hsieh | Tappi J. 74(11): 117(1991) - ABSTRACT: An increase in the standard oxidation potential of the reinforcing agent in the first caustic extraction stage will reduce the amount of AOX in the stage's effluent. A chlorinated broumstock pulp was treated alternatively in a basic caustic extraction (E) stage, an oxygen-reinforced caustic extraction (EO) stage, and an extraction stage reinforced with oxygen and peroxide (EOP). An AOX reduction of up to 30% was obtained in the effluent from the peroxide-reinforced extraction stage. In addition to the brownstock work, using two different model lignin compounds, we ran tests using oxyen, potassium permanganate, hydrogen peroxide with oxygen, and ozone with oxygen-reinforced caustic stages. In all cases, increasing the oxidation potential of the reinforcing agent decreased the amount of AOX detected in the effluent.

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
Differences in bleaching responses from fungal- versus bacterial-derived enzymes, TAPPI JOURNAL March 2012

Differences in bleaching responses from fungal- versus bacterial-derived enzymes, TAPPI JOURNAL March 2012

Journal articles
Open Access
Reductive degradation of residual chromophores in kraft pulp with sodium dithionite, TAPPI JOURNAL March 2012

Reductive degradation of residual chromophores in kraft pulp with sodium dithionite, TAPPI JOURNAL March 2012

Journal articles
Magazine articles
Open Access
Guest Editorial: Terry Bliss: Editorial board member "extrem

Guest Editorial: Terry Bliss: Editorial board member "extreme", TAPPI JOURNAL May 2012

Journal articles
Open Access
Two-sided drainage handsheet machine, TAPPI JOURNAL May 2012

Two-sided drainage handsheet machine, TAPPI JOURNAL May 2012

Journal articles
Open Access
Characterization of printed offset ink layers on printing papers using fractal analysis, TAPPI JOURNAL May 2012

Characterization of printed offset ink layers on printing papers using fractal analysis, TAPPI JOURNAL May 2012

Journal articles
Open Access
Optical and photocatalytic properties of photoactive paper with polycrystalline TiO2 nanopigment for optimal product design, TAPPI JOURNAL May 2012

Optical and photocatalytic properties of photoactive paper with polycrystalline TiO2 nanopigment for optimal product design, TAPPI JOURNAL May 2012

Journal articles
Open Access
An activity-based cost calculation for a kraft pulp mill, TAPPI JOURNAL September 2012

An activity-based cost calculation for a kraft pulp mill, TAPPI JOURNAL September 2012

Journal articles
Open Access
Measuremets of sootblower jet strength in kraft recovery boilers â?¢ Part II: Results of the third and fourth field trials, TAPPI JOURNAL September 2012

Measuremets of sootblower jet strength in kraft recovery boilers • Part II: Results of the third and fourth field trials, TAPPI JOURNAL September 2012

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