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Journal articles
Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989
Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989
Journal articles
Determining the basic density of wood chips, TAPPI JOURNAL, April 1990, Vol. 73(4)
Determining the basic density of wood chips, TAPPI JOURNAL, April 1990, Vol. 73(4)
Journal articles
Biotechnology in the pulp and paper industry: a review - part 1: tree improvement, pulping and bleaching, and dissolving pulp applications, TAPPI JOURNAL, April 1990, Vol. 73(4)
Biotechnology in the pulp and paper industry: a review - part 1: tree improvement, pulping and bleaching, and dissolving pulp applications, TAPPI JOURNAL, April 1990, Vol. 73(4)
Journal articles
NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)
NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)
Journal articles
Converted bleach sequence improves pulp quality, TAPPI JOURNAL, July 1990, Vol. 73(7)
Converted bleach sequence improves pulp quality, TAPPI JOURNAL, July 1990, Vol. 73(7)
Journal articles
A new wet-end control system with on-line sensors, TAPPI JOURNAL, July 1990, Vol. 73(7)
A new wet-end control system with on-line sensors, TAPPI JOURNAL, July 1990, Vol. 73(7)
Journal articles
Pulping of southern pine under low water, alkaline conditions using supercritical carbon dioxide-sulfur dioxide mixtures, TAPPI JOURNAL, July 1990, Vol. 73(7)
Pulping of southern pine under low water, alkaline conditions using supercritical carbon dioxide-sulfur dioxide mixtures, TAPPI JOURNAL, July 1990, Vol. 73(7)
Journal articles
Hydrogen-peroxide-reinforced oxygen delignification of southern pine kraft pulp and short sequence bleaching, TAPPI JOURNAL, July 1990, Vol. 73(7)
Hydrogen-peroxide-reinforced oxygen delignification of southern pine kraft pulp and short sequence bleaching, TAPPI JOURNAL, July 1990, Vol. 73(7)
Magazine articles
Measuring customer perception of print quality, TAPPI JOURNAL, March 1990, Vol. 73(3)
Measuring customer perception of print quality, TAPPI JOURNAL, March 1990, Vol. 73(3)
Journal articles
Magazine articles
Critical parameters for tall oil separation I: The importance of ration of fatty acids to rosin acids, TAPPI Journal September 2019
ABSTRACT: Tall oil is a valuable byproduct in chemical pulping of wood, and its fractions have a large spectrum of applications as chemical precursors, detergents, and fuel. High recovery of tall oil is important for the economic and environmental profile of chemical pulp mills. The purpose of this study was to investigate critical parameters of tall oil separation from black liquor. To investigate this in a controlled way, we developed a model test system using a “synthetic” black liquor (active cooking chemicals OH- and HS- ions), a complete process for soap skimming, and determination of recovered tall oil based on solvent extraction and colorimetric analysis, with good reproducibility. We used the developed system to study the effect of the ratio of fatty acids to rosin acids on tall oil separation. When high amounts of rosin acids were present, tall oil recovery was low, while high content of fatty acids above 60% significantly promoted tall oil separation. Therefore, manipulating the content of fatty acids in black liquor before the soap skimming step can significantly affect the tall oil solubility, and hence its separation. The findings open up chemical ways to improve the tall oil yield.