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Journal articles
Open Access
The hyperbolic theory of light scattering, tensile strength, and density in paper, TAPPI JOURNAL November 2011

The hyperbolic theory of light scattering, tensile strength, and density in paper, TAPPI JOURNAL November 2011

Journal articles
Open Access
Cavitation-jet deinking: A new technology for deinking of recovered paper, TAPPI JOURNAL September 2014

Cavitation-jet deinking: A new technology for deinking of recovered paper, TAPPI JOURNAL September 2014

Journal articles
Open Access
89JUN163

The influence of chlorine ratio and oxygen bleaching on the formation of PCDFs and PCDDs in pulp bleaching - Part 2: a full mill study, TAPPI JOURNAL June 1989

Journal articles
Open Access
Facile preparation of nanofiller-paper using mixed office paper without deinking, TAPPI JOURNAL 2015 March - 15MAR167

Facile preparation of nanofiller-paper using mixed office paper without deinking, TAPPI JOURNAL March 2015

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
Anthraquinone pulping of kudzu (pueraria lobata), TAPPI Journal December 2024

Authors: Peter W. Hart, Brian N. Brogdon, and Jeffrey S. Hsieh | TAPPI J. 76(4): 162(1993) - ABSTRACT: Kudzu was pulped underpulping conditions for kraft, kraft-AQ, soda, and soda-AQ processes. Anthraquinone addition increlased the carbohydrate content of the brownstock pulp for all cooks. Anthraquinone addition lowered the broumrtock kappa number while reducing the chemical demand. Brownstock ~om selected pulping sequences was tested to determine tear strength, tensile strength, burst strength, and~eeness. The broumstock was also subjected to a CED bleaching sequence. For the bleached pulps, viscosity and average fiber length were determined.

Journal articles
Open Access
Reducing aox by increasing oxidation potential in the first

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.

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