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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
Open Access
Online measurement of bulk, tensile, brightness, and ovendry content of bleached chemithermomechanical pulp using visible and near infrared spectroscopy, TAPPI JOURNAL April 2018

Online measurement of bulk, tensile, brightness, and ovendry content of bleached chemithermomechanical pulp using visible and near infrared spectroscopy, TAPPI JOURNAL April 2018

Journal articles
Magazine articles
Open Access
Enzymatic treated viscose fibers functionalized by chitosan, TAPPI JOURNAL August 2018

Enzymatic treated viscose fibers functionalized by chitosan, TAPPI JOURNAL August 2018

Journal articles
Open Access
Improvement in the Fock test for determining the reactivity of dissolving pulp, TAPPI JOURNAL November 2013

Improvement in the Fock test for determining the reactivity of dissolving pulp, TAPPI JOURNAL November 2013

Journal articles
Open Access
The effect of introducing ozone in elemental chlorine free bleaching of eucalyptus kraft pulp, TAPPI JOURNAL November 2013

The effect of introducing ozone in elemental chlorine free bleaching of eucalyptus kraft pulp, TAPPI JOURNAL November 2013

Journal articles
Open Access
Elemental chlorine-free bleaching of North American hardwood kraft pulps: Evaluation of oxidant-reinforced extraction variables on overall bleaching optimization, TAPPI JOURNAL October 2013

Elemental chlorine-free bleaching of North American hardwood kraft pulps: Evaluation of oxidant-reinforced extraction variables on overall bleaching optimization, TAPPI JOURNAL October 2013

Journal articles
Open Access
Co-firing black liquor and biomass in a laboratory single droplet reactor â?¢ effects on emissions and combustion characteristics, TAPPI JOURNAL September 2010

Co-firing black liquor and biomass in a laboratory single droplet reactor • effects on emissions and combustion characteristics, TAPPI JOURNAL September 2010

Journal articles
Open Access
Global survey on lime kiln operation, energy consumption, and alternative fuel usage, TAPPI JOURNAL August 2011

Global survey on lime kiln operation, energy consumption, and alternative fuel usage, TAPPI JOURNAL August 2011

Journal articles
Open Access
Selectivity of oxygen delignification for southern softwood kraft pulps with high lignin content, TAPPI JOURNAL August 2011

Selectivity of oxygen delignification for southern softwood kraft pulps with high lignin content, TAPPI JOURNAL August 2011

Journal articles
Open Access
Pretreatment to improve adsorption and effectiveness of wet end chemicals for a bleached chemithermomechanical pulp, TAPPI JOURNAL August 2011

Pretreatment to improve adsorption and effectiveness of wet end chemicals for a bleached chemithermomechanical pulp, TAPPI JOURNAL August 2011

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