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Journal articles
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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
Kingsport Celebrates Its Centennial, Paper360º November/Dec

Kingsport Celebrates Its Centennial, Paper360º November/December 2016

Journal articles
Magazine articles
Best Practices for Wastewater Treatment and Management, Pape

Best Practices for Wastewater Treatment and Management, Paper360º November/December 2016

Journal articles
Magazine articles
Extending Its Reach, Paper360º, July/August 2017

Extending Its Reach, Paper360º, July/August 2017

Journal articles
Open Access
Guest Editorial: TAPPIâ??s 2013 PEERS Conference: Pulp manufacturing highlights, TAPPI JOURNAL March 2014

Guest Editorial: TAPPI’s 2013 PEERS Conference: Pulp manufacturing highlights, TAPPI JOURNAL March 2014

Journal articles
Coated Papers in Asia Pacific, Paper360º May/June 2014

Coated Papers in Asia Pacific, Paper360º May/June 2014

Journal articles
Over the Wire: AROUND the industry 14SEPPA10

Over the Wire, Paper360º September/October 2014

Journal articles
The Challenge of Coal Ash, Paper360° September/October 2014

The Challenge of Coal Ash, Paper360º September/October 2014

Journal articles
TechLink: Inside Tappi Journal

TAPPI JOURNAL Summaries, Paper360º September/October 2014

Journal articles
Managing the Risk of Fire and explosion in the Pulp and Paper Industry, Paper360° May/June 2013

Managing the Risk of Fire and explosion in the Pulp and Paper industry, Paper360º May/June 2013

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