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Magazine articles
Emerging pulping and chlorine-free bleaching technologies: in search of the ideal pulp mill, TAPPI JOURNAL, July 1991, Vol. 74(7)
Emerging pulping and chlorine-free bleaching technologies: in search of the ideal pulp mill, TAPPI JOURNAL, July 1991, Vol. 74(7)
Magazine articles
Corrosion of metallic and nonmetallic piping for bleach-plant d-stage filtrate, TAPPI JOURNAL, June 1991, Vol. 74(6)
Corrosion of metallic and nonmetallic piping for bleach-plant d-stage filtrate, TAPPI JOURNAL, June 1991, Vol. 74(6)
Magazine articles
Advanced controls reduce recovery boiler emissions and increase throughput at mead, escanaba, TAPPI JOURNAL, September 1992, Vol. 75(9)
Advanced controls reduce recovery boiler emissions and increase throughput at mead, escanaba, TAPPI JOURNAL, September 1992, Vol. 75(9)
Magazine articles
The 1992 international chemical recovery conference, TAPPI JOURNAL, September 1992, Vol. 75(9)
The 1992 international chemical recovery conference, TAPPI JOURNAL, September 1992, Vol. 75(9)
Magazine articles
Hot-melt adhesive development and the proliferation of raw materials, TAPPI JOURNAL, September 1991, Vol. 74(9)
Hot-melt adhesive development and the proliferation of raw materials, TAPPI JOURNAL, September 1991, Vol. 74(9)
Magazine articles
Alberta newsprint and alberta research council bring deinking pilot plant on-stream, TAPPI JOURNAL, December 1992, Vol. 75(12)
Alberta newsprint and alberta research council bring deinking pilot plant on-stream, TAPPI JOURNAL, December 1992, Vol. 75(12)
Journal articles
Magazine articles
The solubility of calcium carbonate in green liquor handling systems, TAPPI Journal October 2019
ABSTRACT: The formation of hard calcite (CaCO3) scale in green liquor handling systems is a persistent problem in many kraft pulp mills. CaCO3 precipitates when its concentration in the green liquor exceeds its solubility. While the solubility of CaCO3 in water is well known, it is not so in the highly alkaline green liquor environment. A systematic study was conducted to determine the solubility of CaCO3 in green liquor as a function of temperature, total titratable alkali (TTA), causticity, and sulfidity. The results show that the solubility increases with increased temperature, increased TTA, decreased causticity, and decreased sulfidity. The new solubility data was incorporated into OLI (a thermodynamic simulation program for aqueous salt systems) to generate a series of CaCO3 solubility curves for various green liquor conditions. The results help explain how calcite scale forms in green liquor handling systems.
Magazine articles
A waste management program for paper mill sludge high in ash, TAPPI JOURNAL, April 1990, Vol. 73(4)
A waste management program for paper mill sludge high in ash, TAPPI JOURNAL, April 1990, Vol. 73(4)
Magazine articles
A visit to mount st. helens; meta lake illustrates natural recovery following volcanic eruption, TAPPI JOURNAL, April 1994, Vol. 77(4)
A visit to mount st. helens; meta lake illustrates natural recovery following volcanic eruption, TAPPI JOURNAL, April 1994, Vol. 77(4)
Journal articles
Magazine articles
A new method of studying the fundamental mechanisms involved in pigment liberation from recycle papers, TAPPI Journal October 2022
ABSTRACT: Deinking flotation is the most efficient and widely used method of removing ink particles from printed papers to improve the recyclability. A prerequisite for successful deinking flotation is detachment of pigments from paper fibers, a subprocess known as liberation. The degree of liberation is usually determined via hyperwashing tests, which are costly and time consuming. Furthermore, they provide no information on the fundamental mechanisms controlling liberation. In the present work, we developed a new method in which ?-potentials of the particles in a pulp are measured and analyzed. If pigments are not liberated from paper fibers, a frequency distribution plot gives a single peak, while two peaks appear when they are liberated. One can readily determine the degrees of liberation from the peak positions and peak heights. In addition, the ?-potential data can be used to construct disjoining pressure isotherms using the DLVO theory that are useful to better understand the fundamental mechanisms involved and the roles of different reagents used to improve pigment liberation.