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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.

Magazine articles
Open Access
Deinking Difficulties Related to Ink Formulation, Printing P

Deinking Difficulties Related to Ink Formulation, Printing Process and Type of Paper

Journal articles
Open Access
Practical windows and inhibitors for grade 2 titanium use in alkaline peroxide bleach solutions, TAPPI JOURNAL, November 1995, Vol. 78(11)

Practical windows and inhibitors for grade 2 titanium use in alkaline peroxide bleach solutions, TAPPI JOURNAL, November 1995, Vol. 78(11)

Journal articles
Open Access
Some fundamental aspects of wood chipping, TAPPI JOURNAL, October 1995, Vol. 78(10)

Some fundamental aspects of wood chipping, TAPPI JOURNAL, October 1995, Vol. 78(10)

Journal articles
Open Access
Steam drying and fluidized-bed calcination of lime mudâ??results of extended pilot studies, TAPPI JOURNAL, September 1995, Vol. 78(9)

Steam drying and fluidized-bed calcination of lime mud—results of extended pilot studies, TAPPI JOURNAL, September 1995, Vol. 78(9)

Magazine articles
Open Access
Factors affecting the fabrication of corrosion barriers for rp equipment in bleaching environments, TAPPI JOURNAL, September 1995, Vol. 78(9)

Factors affecting the fabrication of corrosion barriers for rp equipment in bleaching environments, TAPPI JOURNAL, September 1995, Vol. 78(9)

Journal articles
Open Access
Laboratory kraft pulping of juvenile tropical pines: pinus patula, p. tecunumanii, p. maximinoi, and p. chiapensis, TAPPI JOURNAL, April 1996, Vol. 79(4)

Laboratory kraft pulping of juvenile tropical pines: pinus patula, p. tecunumanii, p. maximinoi, and p. chiapensis, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
The effect of pulp fiber properties on the tearing work of paper, TAPPI JOURNAL, April 1996, Vol. 79(4)

The effect of pulp fiber properties on the tearing work of paper, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
Improvements in ecf bleaching: use of activated oxygen species and xylanase, TAPPI JOURNAL, April 1996, Vol. 79(4)

Improvements in ecf bleaching: use of activated oxygen species and xylanase, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
Enzymes improve the bleachability of bagasse mechanical pulp, TAPPI JOURNAL, August 1996, Vol.79(8)

Enzymes improve the bleachability of bagasse mechanical pulp, TAPPI JOURNAL, August 1996, Vol.79(8)

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