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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
Open Access
Focused beam reflectant measurement as a tool to measure flocculation, TAPPI JOURNAL, December 2002, Vol. 1(10) (324KB)

Focused beam reflectant measurement as a tool to measure flocculation, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (324KB)

Journal articles
Open Access
Effects of temperature and moisture content on paper behavio

Effects of temperature and moisture content on paper behavior in the nip, TAPPI JOURNAL, December 2002, Vol. 1(10) (255KB)

Journal articles
Open Access
Effect of geometry and thermal boundary conditions on calend

Effect of geometry and thermal boundary conditions on calender roll thermal deformation, TAPPI JOURNAL, December 2002, Vol. 1(10) (247KB)

Journal articles
Open Access
Calendering model for CD control, TAPPI JOURNAL, December 2002, Vol. 1(10) (434KB)

Calendering model for CD control, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (434KB)

Journal articles
Open Access
The effect of slot shape on the performance of a pressure screen, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (1836KB)

The effect of slot shape on the performance of a pressure screen, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (1836KB)

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
Statistical modeling and sizing determination guides for dispersed rosin sizes, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (250KB)

Statistical modeling and sizing determination guides for dispersed rosin sizes, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (250KB)

Journal articles
Open Access
The mechanism of premixing rosin sizes for neutral-alkaline papermaking, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (152KB)

The mechanism of premixing rosin sizes for neutral-alkaline papermaking, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (152KB)

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