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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
Magazine articles
TAPPI Journal Summaries, Paper360º September/October 2019

TAPPI Journal Summaries, Paper360º September/October 2019

Journal articles
Open Access
Heat integration opportunities in an average Scandinavian fine paper mill: Model study and comparison with a market pulp mill, TAPPI JOURNAL February 2008

Heat integration opportunities in an average Scandinavian fine paper mill: Model study and comparison with a market pulp mill, TAPPI JOURNAL February 2008

Journal articles
Sampling the Process - Part 1, Frontline Focus, Volume 4, Issue 2

Frontline Focus, February 2008

Journal articles
Papermaking is sexy! (part 1), Frontline Focus, Volume 4, Issue 7

Frontline Focus, July 2008

Journal articles
Four Equipment Upgrade Projects Reduce System Energy Losses at Augusta Newsprint (part 1), Frontline Focus, Volume 4, Issue 9

Frontline Focus, September 2008

Journal articles
Improving Paper Machine Efficiency (part 1), Frontline Focus, Volume 4, Issue 11

Frontline Focus, November 2008

Implementation of New 500tpd Chemical Bagasse Pulp Line, 2013 PEERS Conference

Could biomass-fueled boilers be operated at higher steam temperatures? 3. Initial analysis of costs and benefits., 2013 PEERS Conference

Full Scale Application of Ozone for Bulking Control at a Pulp & Paper Facility, 2013 PEERS Conference

Full Scale Application of Ozone for Bulking Control at a Pulp & Paper Facility, 2013 PEERS Conference

Bagasse Handling Challenges-Mill Experiences, 2013 PEERS Conference

Bagasse Handling Challenges-Mill Experiences, 2013 PEERS Conference

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