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Journal articles
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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
Magazine articles
TAPPI Journal Summaries, Paper360º September/October 2019

TAPPI Journal Summaries, Paper360º September/October 2019

Journal articles
Duplex stainless steel digesters: A better choice?, Solution

Duplex stainless steel digesters: A better choice?, Solutions!, Online Exclusives, April 2003

Journal articles
Open Access
Data for better maintenance plans and investments policy, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (354KB)

Data for better maintenance plans and investments policy, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (354KB)

Journal articles
Supplier partnering-Keep your profits up and costs down, Sol

Supplier partnering-Keep your profits up and costs down, Solutions!, Online Exclusives, December 2003

Journal articles
Open Access
Internet based, interactive simulation: the concept and an evaporator example, TAPPI JOURNAL, February 2003, Vol. 2(2) (147KB)

Internet based, interactive simulation: the concept and an evaporator example, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (147KB)

Journal articles
Trends and ideas, Solutions!, Online Exclusives, February 20

Trends and ideas, Solutions!, Online Exclusives, February 2003

Journal articles
CTR improves business performance, Solutions!, Online Exclus

CTR improves business performance, Solutions!, Online Exclusives, February 2003

Journal articles
Three easy steps for gathering intelligence at trade shows,

Three easy steps for gathering intelligence at trade shows, Solutions!, Online Exclusives, July 2003

Journal articles
Thailand cooks up a big fish, Solutions!, Online Exclusives,

Thailand cooks up a big fish, Solutions!, Online Exclusives, July 2003

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