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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
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.

Journal articles
Open Access
Response of bagasse and wheat straw recycled pulps to refining, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (349KB)

Response of bagasse and wheat straw recycled pulps to refining, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (349KB)

Journal articles
Open Access
Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)

Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)

Journal articles
Open Access
Reducing shives level in nonwood chemithermomechanical pulp, TAPPI JOURNAL, August 2005, Vol. 4(8) (200 KB)

Reducing shives level in nonwood chemithermomechanical pulp, TAPPI JOURNAL, August 2005, Vol. 4(8) (200 KB)

Journal articles
Open Access
Steps to increase profits through operations improvementâ??Part 1, TAPPI JOURNAL, August 2001, Vol. 84(8)

Steps to increase profits through operations improvement—Part 1, TAPPI JOURNAL, August 2001, Vol. 84(8)

Journal articles
Open Access
Deinking recycled paper with a high flexographic ink content, TAPPI JOURNAL, August 2001, Vol. 84(8)

Deinking recycled paper with a high flexographic ink content, TAPPI JOURNAL, August 2001, Vol. 84(8)

Journal articles
Open Access
A novel multiport cylinder dryer, TAPPI JOURNAL, February 2001, Vol. 84(2)

A novel multiport cylinder dryer, TAPPI JOURNAL, February 2001, Vol. 84(2)

Journal articles
Open Access
Comparative papermaking properties of oil-palm empty fruit bunch, TAPPI JOURNAL, January 2001, Vol. 84(1)

Comparative papermaking properties of oil-palm empty fruit bunch, TAPPI JOURNAL, January 2001, Vol. 84(1)

Journal articles
Open Access
Arundo donax l. reed: new perspectives for pulping and bleaching 1. raw material characterisation, TAPPI JOURNAL, January 2001, Vol. 84(1)

Arundo donax l. reed: new perspectives for pulping and bleaching 1. raw material characterisation, TAPPI JOURNAL, January 2001, Vol. 84(1)

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