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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
Preparation and characterization of cellulose nanofibers from bleached pulp using a mechanical treatment method, TAPPI JOURNAL May 2014

Preparation and characterization of cellulose nanofibers from bleached pulp using a mechanical treatment method, TAPPI JOURNAL May 2014

Journal articles
Open Access
Comparative annual cost efficiency between thermal and chemical oxidation of TRS in kraft mills, TAPPI JOURNAL, July 2005, Vol. 4(7) (200 KB)

Comparative annual cost efficiency between thermal and chemical oxidation of TRS in kraft mills, TAPPI JOURNAL, July 2005, Vol. 4(7) (200 KB)

Journal articles
Magazine articles
Open Access
In-process detection of fiber cutting in low consistency ref

In-process detection of fiber cutting in low consistency refining based on measurement of forces on refiner bars, TAPPI JOURNAL April 2017

Journal articles
Magazine articles
Open Access
Understanding conductivity and soda loss

Understanding conductivity and soda loss

Journal articles
Open Access
Effects of creping conditions on surface softness of tissue paper - application of sled method, TAPPI JOURNAL, December 2000, Vol. 83(12)

Effects of creping conditions on surface softness of tissue paper - application of sled method, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Direct causticization of kraft black liquor solids with tio2 in a fluidized bed, TAPPI JOURNAL, December 2000, Vol. 83(12)

Direct causticization of kraft black liquor solids with tio2 in a fluidized bed, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
The influence of formation on tensile strength of paper made from mechanical pulps, TAPPI JOURNAL, December 2000, Vol. 83(12)

The influence of formation on tensile strength of paper made from mechanical pulps, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Organizing for speed: an essential component for value delivery, TAPPI JOURNAL, December 2000, Vol. 83(12)

Organizing for speed: an essential component for value delivery, TAPPI JOURNAL, December 2000, Vol. 83(12)

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