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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
Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)

Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)

Journal articles
Open Access
Modifying boiler operation to reduce primary air port cracking in a recovery boiler, TAPPI JOURNAL, December 2003 (732KB)

Modifying boiler operation to reduce primary air port cracking in a recovery boiler, Solutions! & TAPPI JOURNAL, December 2003 (732KB)

Journal articles
Open Access
Paper properties and swelling properties of ozone-based ECF bleached softwood kraft pulps, TAPPI JOURNAL, FEB 2003 (92KB)

Paper properties and swelling properties of ozone-based ECF bleached softwood kraft pulps, Solutions! & TAPPI JOURNAL, FEB 2003 (92KB)

Journal articles
Open Access
Recovery boiler furnace as concentrated NCG incinerator, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (29KB)

Recovery boiler furnace as concentrated NCG incinerator, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (29KB)

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
Open Access
Economic benefits achieved from an odor reduction project, Solutions! & TAPPI JOURNAL, January 2003 (531KB)

Economic benefits achieved from an odor reduction project, Solutions! & TAPPI JOURNAL, January 2003 (531KB)

Journal articles
Open Access
FT-Raman spectroscopy for direct measurement of lignin concentrations in kraft pulps, TAPPI JOURNAL, January 2003 (561KB)

FT-Raman spectroscopy for direct measurement of lignin concentrations in kraft pulps, Solutions! & TAPPI JOURNAL, January 2003 (561KB)

Journal articles
Open Access
Breakup Mechanisms of Brittle Deposits in Kraft Recovery Boilers â?¢ A Fundamental Study, TAPPI JOURNAL September 2009

Breakup Mechanisms of Brittle Deposits in Kraft Recovery Boilers • A Fundamental Study, TAPPI JOURNAL September 2009

Journal articles
Open Access
Effects of debonding agents and refining on the properties of deinked pulp, TAPPI JOURNAL, July 2008

Effects of debonding agents and refining on the properties of deinked pulp, TAPPI JOURNAL, July 2008

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