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Journal articles
Open Access
Image analytical monitoring of paper quality - a feasibility

Image analytical monitoring of paper quality - a feasibility study, TAPPI JOURNAL, November 2006

Journal articles
Open Access
Use of enzymes for reduction in refining energy - laboratory

Use of enzymes for reduction in refining energy - laboratory studies, TAPPI JOURNAL, November 2006

Journal articles
Open Access
Dispersion of pulp slurries using carboxymethylcellulose, TAPPI JOURNAL, October 2000, Vol. 83(10)

Dispersion of pulp slurries using carboxymethylcellulose, TAPPI JOURNAL, October 2000, Vol. 83(10)

Journal articles
Open Access
Infrared analysis for process control in the pulp and paper industry, TAPPI JOURNAL, October 2000, Vol. 83(10)

Infrared analysis for process control in the pulp and paper industry, TAPPI JOURNAL, October 2000, Vol. 83(10)

Journal articles
Open Access
Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Subscription Access
Case study: power company operates Alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Case study: power company operates alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Journal articles
Magazine articles
Open Access
Editorial: 2018 TAPPI Journal features diverse content, TAPPI Journal November 2018

Editorial: 2018 TAPPI Journal features diverse content, TAPPI Journal November 2018

Journal articles
Open Access
Life-cycle thinking in the pulp and paper industry, Part I: Current practices and most promising avenues, TAPPI JOURNAL, July 2007

Life-cycle thinking in the pulp and paper industry, Part I: Current practices and most promising avenues, TAPPI JOURNAL, July 2007

Journal articles
Open Access
Treatment of Bleaching Effluent From the Pulp and Paper Industry by Photcatalytic Oxidation, TAPPI JOURNAL, June 2007

Treatment of Bleaching Effluent From the Pulp and Paper Industry by Photcatalytic Oxidation, TAPPI JOURNAL, June 2007

Journal articles
Magazine articles
Open Access
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.

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