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Journal articles
Open Access
Fundamental study of screening hydraulics part 1: flow patterns at the feed-side surface of screen baskets; mechanism of fiber-mat formation and remixing, TAPPI JOURNAL, August 1994, Vol. 77(8)

Fundamental study of screening hydraulics part 1: flow patterns at the feed-side surface of screen baskets; mechanism of fiber-mat formation and remixing, TAPPI JOURNAL, August 1994, Vol. 77(8)

Journal articles
Open Access
Further Impressions of South America: A Continuation of One

Further Impressions of South America: A Continuation of One Participant's Impressions from the TAPPI South America Study Tour, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
Laja Mill a Modern Pioneer in Chile: Empresas CMPC is keepin

Laja Mill a Modern Pioneer in Chile: Empresas CMPC is keeping its oldest mill in peak condition, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
Santa Fe Pulp Mill - A Brief Profile: Pulping mill was one o

Santa Fe Pulp Mill - A Brief Profile: Pulping mill was one of three major projects completed in the early 1990s in Chile, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
State of the Paper Industry: Prospects brighten for U.S. pap

State of the Paper Industry: Prospects brighten for U.S. paper industry exports with the implementation of NAFTA and GATT, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
Communities benefit from bowater pocket wilderness program:

Communities benefit from bowater pocket wilderness program: set-aside areas help public appreciate nature and company's efforts, TAPPI JOURNAL, March 1994, Vol. 77(3)

Journal articles
Open Access
Industry, school, government cooperate in model training for

Industry, school, government cooperate in model training for operators: mills and workers benefit from specialized educational program, TAPPI JOURNAL, March 1994, Vol. 77(3)

Journal articles
Open Access
Anthraquinone pulping of kudzu (pueraria lobata), TAPPI JOUR

Author: Peter W. Hart | 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
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
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.

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